[1] Which of the following is biode-gradable?
A.
Paper
B.
D.D.T.
C.
Aluminium
D.
Plastic
Ans:
Paper
Explanation :
Paper is produced by pressing together moist fibers, typically cellulose pulp derived from wood, rags or grasses, and drying them into flexible sheets.
[2] The ‘Green House effect' is produced due to the presence of excess amount of –
A.
Sulphur dioxide
B.
Nitrogen dioxide
C.
Carbon monoxide
D.
Methane
Ans:
Methane
Explanation :
By their percentage contribution to the greenhouse effect on Earth the four major gases are: Water vapour (36-70%), Carbon dioxide (9-26%), Methane (4-9%) and Ozone (3-7%).
[3] Which of the following acids serves as an electrolyte in a lead storage battery?
A.
Sulphuric acid
B.
Lactic acid
C.
Hydrochloric acid
D.
Nitric acid
Ans:
Sulphuric acid
Explanation :
Dilute sulfuric acid (H2SO4) serves as the electrolyte in a lead-acid battery. Dilute sulfuric acid used for lead acid battery has ratio (to water) of 3:1 other components of the battery include: Lead peroxide (PbO2) and Sponge lead (Pb).
[4] Which of the following is a natural polymer?
A.
Bakelite
B.
Nylon
C.
Polythene
D.
Starch
Ans:
Starch
Explanation :
Cotton, starch, cellulose and rubber are some of the naturally occurring polymers. Starch is a condensation polymer made up of hundreds of glucose monomers, which split out water molecules as they chemically combine. Starch is a member of the basic food group carbohydrates and is fourid in cereal grains and potatoes. It is also referred to as a polysaccharide, because it is a polymer of the monosaccharide glucose.
[5] Which one of the following nonmetals shows allotropy in the liguid state?
A.
Carbon
B.
Sulphur
C.
Phosphorous
D.
Bromine
Ans:
Sulphur
Explanation :
Sulphur is a non-metal that shows allotropy in the liquid state. If sulphur is heated slowly the changes between the different forms can be observed. These changes are in the form of colour and viscosity (thickness) of the liquid. If the dark brown liquid sulphur is poured into a beaker of cold water, plastic sulphur is formed. This is an elastic, rubber-like form of sulphur.
[6] Atoms of same element having different mass numbers are Called _.
A.
Isobars
B.
Isotopes
C.
Isotones
D.
Isomers
Ans:
Isotopes
Explanation :
Atoms that have the same atomic number but different atomic masses are called isotopes. The difference in mass arises due to the atoms containing a different number of neutrons for the same number of protons. For example, carbon-12, carbon-13 and carbon-14 are three isotopes of the element carbon with mass numbers 12, 13 and 14 respectively.
[7] Bee sting contains -
A.
An acidic liquid
B.
asalt solution
C.
an alkaline liquid
D.
acorrosive liquid
Ans:
An acidic liquid
Explanation :
A bee sting is a sting from a bee (honey bee, bumblebee, sweat bee, etc.). Bee stings are acidic. So its effects can be neutralized with bicarbonate of soda or alkali and this reaction reduces the pain.
[8] The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called -
A.
Nuclear fusion
B.
Nuclear fission
C.
Nuclear reaction
D.
Fast breeding
Ans:
Nuclear fission
Explanation :
Nuclear fission is a process used to create energy. It is when an atom splits apart into smaller atoms. The process gives off a lot of energy, and is used in nuclear weapons and nuclear reactors.
[9] Which element found in all organic compounds?
A.
carbon
B.
nitrogen
C.
calcium
D.
none of them
Ans:
carbon
Explanation :
Carbon is found in all organic matter, but NOT in inorganic matter organic means chemical compounds with carbon in them. In a more general sense, organic refers to living things.
[10] J. B. Sumner isolated first enzyme from Jackbeans as-
A.
amylase
B.
trypsin
C.
urease
D.
renin
Ans:
urease
Explanation :
James Batcheller Sumner (November 19, 1887 – August 12, 1955) was an American chemist. He discovered that enzymes can be crystallized.
[11] Highest percentage of carbon is found in which form of coal?
A.
Anthracite
B.
Bituminous
C.
Peat
D.
Lignite
Ans:
Anthracite
Explanation :
Anthracite is the highest rank of coal since it has a carbon content of over 87% on a dry ash-free basis. Anthracite coal generally has the highest heating value per ton on a mineral-matter-free basis. It has a bright luster and breaks with a semi-conchoidal. fracture.
[12] The chemical that is used to ripen mangoes is -
A.
Calcium sulphide
B.
Calcium carbide
C.
Calcium carbonate
D.
Calcium chloride
Ans:
Calcium carbide
Explanation :
Calcium carbide is used for artificially ripening fruit. When calcium carbide comes in contact with moisture, it produces acetylene gas, which is quite similar in reaction to the natural ripening agent ethylene. Acetylene acts like ethylene and accelerates the ripening process.
[13] Which of the following is not a nitrogenous fetiliser?
A.
Ammonium sulphate
B.
Urea
C.
Ammonium nitrate
D.
Superphosphate
Ans:
Superphosphate
Explanation :
Superphosphateis a common synthetic phosphorus fertilizer. It contains phosphorus and sulphur in a ratio of 1 to 1.22. It is produced by treatment of "phosphate rock" with acids such as sulphuric acid. Superphosphate is the principal carrier of phosphate, the form of phosphorus usable by plants, and is one of the world's most important fertilizers.
[14] Bauxite is used as raw material by which industry?
A.
Aluminium
B.
Iron
C.
Steel
D.
Gold
Ans:
Aluminium
Explanation :
Bauxite is the principal ore of aluminium. Bauxite is not a mineral. It is a rock formed from a laterite soil that has been severely leached of silica and other soluble materials in a wet tropical or subtropical climate. Aluminium is extracted from bauxite using the Bayer process.
[15] Which of the following is not a natural source of hydrocarbon?
A.
Natural Gas
B.
Coal
C.
Petroleum
D.
Mica
Ans:
Mica
Explanation :
There are three main natural sources of hydrocarbons: natural gas, petroleum and coal. Mica is a natural occurring mineral that is based on a collection of silicate minerals and composed of varying amounts of potassium, iron, aluminum, magnesium and water. It is widely used in the electrical industry.
[16] An acid having basicity one is -
A.
Sodium dihydrogen phosphate
B.
Disodium hydrogen phosphate
C.
Sodium phosphate
D.
Phosphoric acid
Ans:
Disodium hydrogen phosphate
Explanation :
The basicity of an acid is the number of hydrogen ions (H+) which can be produced by the ionization of one molecule of the acid in aqueous solution. For ex-ample, the basicity of hydrochloric acid is 1 since one molecule of HCl produces one H+ ion in solution. Similarly, the basicity of Disodium phosphate (Na2HPO4) is one since it has one H+ displaceable ion.
[17] Which one of the following vegetable oils is used in the manufacture of paints?
A.
Palm oil
B.
Sunflower oil
C.
Linseed oil
D.
Cottonseed oil
Ans:
Cottonseed oil
Explanation :
Linseed oil and castor oils are used mainly as drying agents in paints and varnishes. Linseed oil is generally used in the manufacture of oil paints, drying oil finish or varnish in wood finishing, as a pigment binder in oil paints, as a plasticizer and in the manufacture of linoleum.
[18] Dry ice is the solid form of :
A.
Air 7
B.
Carbon dioxide
C.
Nitrogen
D.
Water
Ans:
Carbon dioxide
Explanation :
Dry ice, sometimes referred to as "cardice," is the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and not leaving any residue. It is useful for preserving frozen foods, ice cream, etc., where mechanical cooling is unavailable.
[19] The common name of sodium bicarbonate is -
A.
Soda ash
B.
Baking soda
C.
Soda lime
D.
Baking powder
Ans:
Baking soda
Explanation :
Sodium bicarbonate (NaHCO3) is also known as baking soda, bread soda, cooking soda, and bicarbonate of soda. It is primarily used in cooking (baking), as a leavening agent. It reacts with acidic, components in batters, releasing carbon dioxide, which causes expansion of the batter and forms the characteristic texture and grain in pancakes, cakes, quick breads, etc.
[20] Which element behaves chemically both as metal and nonmetal?
A.
Argon
B.
Boron
C.
Xenon
D.
Carbon
Ans:
Boron
Explanation :
Some elements behave chemically both as metals and nonmetals, and are called metalloids. Their examples include Boron, Silicon, Germanium and Antimony. Elements which are neither metals nor non-metals are called Noble Gases.
[21] The amount of oxygen in the atmosphere remains relatively constant because it is given off by -
A.
Oceans
B.
Animals
C.
Rocks
D.
Plants
Ans:
Plants
Explanation :
Just as water moves from the sky to the earth and back in the hydrologic cycle, oxygen is also cycled through the environment. Plants mark the beginning of the oxygen cycle. They use the energy of sunlight to convert carbon dioxide and water into carbohydrates and oxygen in a process called photosynthesis.
[22] Which one of the following mineral does not contain oxygen?
A.
Haematite
B.
Bauxite
C.
Cryolite
D.
Calcite
Ans:
Cryolite
Explanation :
Cryolite (Na3AlF6), sodium hexafluoroaluminate) does not contain oxygen. It occurs as glassy, colorless, white-reddish to gray-black prismatic monoclinic crystals. Cryolite is used as an insecticide and a pesticide. It is also used to give fireworks a yellow color.
[23] Biogas majorly contains?
A.
Ethane
B.
Methane
C.
Hydrogen
D.
CO
Ans:
Methane
Explanation :
Biogas is a mixture of different gases, major portion in biogas being methane (CH4) and carbon dioxide (CO2). It also contains traces of other gases like hydrogen (H2), Moisture (H2O), hydrogen sulphide (H2S) etc.
[24] The scientific name for common salt is -
A.
Sodium hydroxide
B.
Sodium chloride
C.
Ammonium chloride
D.
Sodium hydrogencarbonate
Ans:
Sodium chloride
Explanation :
Common salt is known as sodium chloride. It is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda etc.
[25] Which of the following is a noble gas -
A.
Argon
B.
Hydrogen
C.
Oxygen
D.
Nitrogen
Ans:
Argon
Explanation :
Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Explanation :
Paper is produced by pressing together moist fibers, typically cellulose pulp derived from wood, rags or grasses, and drying them into flexible sheets.
[2] The ‘Green House effect' is produced due to the presence of excess amount of –
A.
Sulphur dioxide
B.
Nitrogen dioxide
C.
Carbon monoxide
D.
Methane
Ans:
Methane
Explanation :
By their percentage contribution to the greenhouse effect on Earth the four major gases are: Water vapour (36-70%), Carbon dioxide (9-26%), Methane (4-9%) and Ozone (3-7%).
[3] Which of the following acids serves as an electrolyte in a lead storage battery?
A.
Sulphuric acid
B.
Lactic acid
C.
Hydrochloric acid
D.
Nitric acid
Ans:
Sulphuric acid
Explanation :
Dilute sulfuric acid (H2SO4) serves as the electrolyte in a lead-acid battery. Dilute sulfuric acid used for lead acid battery has ratio (to water) of 3:1 other components of the battery include: Lead peroxide (PbO2) and Sponge lead (Pb).
[4] Which of the following is a natural polymer?
A.
Bakelite
B.
Nylon
C.
Polythene
D.
Starch
Ans:
Starch
Explanation :
Cotton, starch, cellulose and rubber are some of the naturally occurring polymers. Starch is a condensation polymer made up of hundreds of glucose monomers, which split out water molecules as they chemically combine. Starch is a member of the basic food group carbohydrates and is fourid in cereal grains and potatoes. It is also referred to as a polysaccharide, because it is a polymer of the monosaccharide glucose.
[5] Which one of the following nonmetals shows allotropy in the liguid state?
A.
Carbon
B.
Sulphur
C.
Phosphorous
D.
Bromine
Ans:
Sulphur
Explanation :
Sulphur is a non-metal that shows allotropy in the liquid state. If sulphur is heated slowly the changes between the different forms can be observed. These changes are in the form of colour and viscosity (thickness) of the liquid. If the dark brown liquid sulphur is poured into a beaker of cold water, plastic sulphur is formed. This is an elastic, rubber-like form of sulphur.
[6] Atoms of same element having different mass numbers are Called _.
A.
Isobars
B.
Isotopes
C.
Isotones
D.
Isomers
Ans:
Isotopes
Explanation :
Atoms that have the same atomic number but different atomic masses are called isotopes. The difference in mass arises due to the atoms containing a different number of neutrons for the same number of protons. For example, carbon-12, carbon-13 and carbon-14 are three isotopes of the element carbon with mass numbers 12, 13 and 14 respectively.
[7] Bee sting contains -
A.
An acidic liquid
B.
asalt solution
C.
an alkaline liquid
D.
acorrosive liquid
Ans:
An acidic liquid
Explanation :
A bee sting is a sting from a bee (honey bee, bumblebee, sweat bee, etc.). Bee stings are acidic. So its effects can be neutralized with bicarbonate of soda or alkali and this reaction reduces the pain.
[8] The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called -
A.
Nuclear fusion
B.
Nuclear fission
C.
Nuclear reaction
D.
Fast breeding
Ans:
Nuclear fission
Explanation :
Nuclear fission is a process used to create energy. It is when an atom splits apart into smaller atoms. The process gives off a lot of energy, and is used in nuclear weapons and nuclear reactors.
[9] Which element found in all organic compounds?
A.
carbon
B.
nitrogen
C.
calcium
D.
none of them
Ans:
carbon
Explanation :
Carbon is found in all organic matter, but NOT in inorganic matter organic means chemical compounds with carbon in them. In a more general sense, organic refers to living things.
[10] J. B. Sumner isolated first enzyme from Jackbeans as-
A.
amylase
B.
trypsin
C.
urease
D.
renin
Ans:
urease
Explanation :
James Batcheller Sumner (November 19, 1887 – August 12, 1955) was an American chemist. He discovered that enzymes can be crystallized.
[11] Highest percentage of carbon is found in which form of coal?
A.
Anthracite
B.
Bituminous
C.
Peat
D.
Lignite
Ans:
Anthracite
Explanation :
Anthracite is the highest rank of coal since it has a carbon content of over 87% on a dry ash-free basis. Anthracite coal generally has the highest heating value per ton on a mineral-matter-free basis. It has a bright luster and breaks with a semi-conchoidal. fracture.
[12] The chemical that is used to ripen mangoes is -
A.
Calcium sulphide
B.
Calcium carbide
C.
Calcium carbonate
D.
Calcium chloride
Ans:
Calcium carbide
Explanation :
Calcium carbide is used for artificially ripening fruit. When calcium carbide comes in contact with moisture, it produces acetylene gas, which is quite similar in reaction to the natural ripening agent ethylene. Acetylene acts like ethylene and accelerates the ripening process.
[13] Which of the following is not a nitrogenous fetiliser?
A.
Ammonium sulphate
B.
Urea
C.
Ammonium nitrate
D.
Superphosphate
Ans:
Superphosphate
Explanation :
Superphosphateis a common synthetic phosphorus fertilizer. It contains phosphorus and sulphur in a ratio of 1 to 1.22. It is produced by treatment of "phosphate rock" with acids such as sulphuric acid. Superphosphate is the principal carrier of phosphate, the form of phosphorus usable by plants, and is one of the world's most important fertilizers.
[14] Bauxite is used as raw material by which industry?
A.
Aluminium
B.
Iron
C.
Steel
D.
Gold
Ans:
Aluminium
Explanation :
Bauxite is the principal ore of aluminium. Bauxite is not a mineral. It is a rock formed from a laterite soil that has been severely leached of silica and other soluble materials in a wet tropical or subtropical climate. Aluminium is extracted from bauxite using the Bayer process.
[15] Which of the following is not a natural source of hydrocarbon?
A.
Natural Gas
B.
Coal
C.
Petroleum
D.
Mica
Ans:
Mica
Explanation :
There are three main natural sources of hydrocarbons: natural gas, petroleum and coal. Mica is a natural occurring mineral that is based on a collection of silicate minerals and composed of varying amounts of potassium, iron, aluminum, magnesium and water. It is widely used in the electrical industry.
[16] An acid having basicity one is -
A.
Sodium dihydrogen phosphate
B.
Disodium hydrogen phosphate
C.
Sodium phosphate
D.
Phosphoric acid
Ans:
Disodium hydrogen phosphate
Explanation :
The basicity of an acid is the number of hydrogen ions (H+) which can be produced by the ionization of one molecule of the acid in aqueous solution. For ex-ample, the basicity of hydrochloric acid is 1 since one molecule of HCl produces one H+ ion in solution. Similarly, the basicity of Disodium phosphate (Na2HPO4) is one since it has one H+ displaceable ion.
[17] Which one of the following vegetable oils is used in the manufacture of paints?
A.
Palm oil
B.
Sunflower oil
C.
Linseed oil
D.
Cottonseed oil
Ans:
Cottonseed oil
Explanation :
Linseed oil and castor oils are used mainly as drying agents in paints and varnishes. Linseed oil is generally used in the manufacture of oil paints, drying oil finish or varnish in wood finishing, as a pigment binder in oil paints, as a plasticizer and in the manufacture of linoleum.
[18] Dry ice is the solid form of :
A.
Air 7
B.
Carbon dioxide
C.
Nitrogen
D.
Water
Ans:
Carbon dioxide
Explanation :
Dry ice, sometimes referred to as "cardice," is the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and not leaving any residue. It is useful for preserving frozen foods, ice cream, etc., where mechanical cooling is unavailable.
[19] The common name of sodium bicarbonate is -
A.
Soda ash
B.
Baking soda
C.
Soda lime
D.
Baking powder
Ans:
Baking soda
Explanation :
Sodium bicarbonate (NaHCO3) is also known as baking soda, bread soda, cooking soda, and bicarbonate of soda. It is primarily used in cooking (baking), as a leavening agent. It reacts with acidic, components in batters, releasing carbon dioxide, which causes expansion of the batter and forms the characteristic texture and grain in pancakes, cakes, quick breads, etc.
[20] Which element behaves chemically both as metal and nonmetal?
A.
Argon
B.
Boron
C.
Xenon
D.
Carbon
Ans:
Boron
Explanation :
Some elements behave chemically both as metals and nonmetals, and are called metalloids. Their examples include Boron, Silicon, Germanium and Antimony. Elements which are neither metals nor non-metals are called Noble Gases.
[21] The amount of oxygen in the atmosphere remains relatively constant because it is given off by -
A.
Oceans
B.
Animals
C.
Rocks
D.
Plants
Ans:
Plants
Explanation :
Just as water moves from the sky to the earth and back in the hydrologic cycle, oxygen is also cycled through the environment. Plants mark the beginning of the oxygen cycle. They use the energy of sunlight to convert carbon dioxide and water into carbohydrates and oxygen in a process called photosynthesis.
[22] Which one of the following mineral does not contain oxygen?
A.
Haematite
B.
Bauxite
C.
Cryolite
D.
Calcite
Ans:
Cryolite
Explanation :
Cryolite (Na3AlF6), sodium hexafluoroaluminate) does not contain oxygen. It occurs as glassy, colorless, white-reddish to gray-black prismatic monoclinic crystals. Cryolite is used as an insecticide and a pesticide. It is also used to give fireworks a yellow color.
[23] Biogas majorly contains?
A.
Ethane
B.
Methane
C.
Hydrogen
D.
CO
Ans:
Methane
Explanation :
Biogas is a mixture of different gases, major portion in biogas being methane (CH4) and carbon dioxide (CO2). It also contains traces of other gases like hydrogen (H2), Moisture (H2O), hydrogen sulphide (H2S) etc.
[24] The scientific name for common salt is -
A.
Sodium hydroxide
B.
Sodium chloride
C.
Ammonium chloride
D.
Sodium hydrogencarbonate
Ans:
Sodium chloride
Explanation :
Common salt is known as sodium chloride. It is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda etc.
[25] Which of the following is a noble gas -
A.
Argon
B.
Hydrogen
C.
Oxygen
D.
Nitrogen
Ans:
Argon
Explanation :
Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Explanation :
Dilute sulfuric acid (H2SO4) serves as the electrolyte in a lead-acid battery. Dilute sulfuric acid used for lead acid battery has ratio (to water) of 3:1 other components of the battery include: Lead peroxide (PbO2) and Sponge lead (Pb).
[4] Which of the following is a natural polymer?
A.
Bakelite
B.
Nylon
C.
Polythene
D.
Starch
Ans:
Starch
Explanation :
Cotton, starch, cellulose and rubber are some of the naturally occurring polymers. Starch is a condensation polymer made up of hundreds of glucose monomers, which split out water molecules as they chemically combine. Starch is a member of the basic food group carbohydrates and is fourid in cereal grains and potatoes. It is also referred to as a polysaccharide, because it is a polymer of the monosaccharide glucose.
[5] Which one of the following nonmetals shows allotropy in the liguid state?
A.
Carbon
B.
Sulphur
C.
Phosphorous
D.
Bromine
Ans:
Sulphur
Explanation :
Sulphur is a non-metal that shows allotropy in the liquid state. If sulphur is heated slowly the changes between the different forms can be observed. These changes are in the form of colour and viscosity (thickness) of the liquid. If the dark brown liquid sulphur is poured into a beaker of cold water, plastic sulphur is formed. This is an elastic, rubber-like form of sulphur.
[6] Atoms of same element having different mass numbers are Called _.
A.
Isobars
B.
Isotopes
C.
Isotones
D.
Isomers
Ans:
Isotopes
Explanation :
Atoms that have the same atomic number but different atomic masses are called isotopes. The difference in mass arises due to the atoms containing a different number of neutrons for the same number of protons. For example, carbon-12, carbon-13 and carbon-14 are three isotopes of the element carbon with mass numbers 12, 13 and 14 respectively.
[7] Bee sting contains -
A.
An acidic liquid
B.
asalt solution
C.
an alkaline liquid
D.
acorrosive liquid
Ans:
An acidic liquid
Explanation :
A bee sting is a sting from a bee (honey bee, bumblebee, sweat bee, etc.). Bee stings are acidic. So its effects can be neutralized with bicarbonate of soda or alkali and this reaction reduces the pain.
[8] The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called -
A.
Nuclear fusion
B.
Nuclear fission
C.
Nuclear reaction
D.
Fast breeding
Ans:
Nuclear fission
Explanation :
Nuclear fission is a process used to create energy. It is when an atom splits apart into smaller atoms. The process gives off a lot of energy, and is used in nuclear weapons and nuclear reactors.
[9] Which element found in all organic compounds?
A.
carbon
B.
nitrogen
C.
calcium
D.
none of them
Ans:
carbon
Explanation :
Carbon is found in all organic matter, but NOT in inorganic matter organic means chemical compounds with carbon in them. In a more general sense, organic refers to living things.
[10] J. B. Sumner isolated first enzyme from Jackbeans as-
A.
amylase
B.
trypsin
C.
urease
D.
renin
Ans:
urease
Explanation :
James Batcheller Sumner (November 19, 1887 – August 12, 1955) was an American chemist. He discovered that enzymes can be crystallized.
[11] Highest percentage of carbon is found in which form of coal?
A.
Anthracite
B.
Bituminous
C.
Peat
D.
Lignite
Ans:
Anthracite
Explanation :
Anthracite is the highest rank of coal since it has a carbon content of over 87% on a dry ash-free basis. Anthracite coal generally has the highest heating value per ton on a mineral-matter-free basis. It has a bright luster and breaks with a semi-conchoidal. fracture.
[12] The chemical that is used to ripen mangoes is -
A.
Calcium sulphide
B.
Calcium carbide
C.
Calcium carbonate
D.
Calcium chloride
Ans:
Calcium carbide
Explanation :
Calcium carbide is used for artificially ripening fruit. When calcium carbide comes in contact with moisture, it produces acetylene gas, which is quite similar in reaction to the natural ripening agent ethylene. Acetylene acts like ethylene and accelerates the ripening process.
[13] Which of the following is not a nitrogenous fetiliser?
A.
Ammonium sulphate
B.
Urea
C.
Ammonium nitrate
D.
Superphosphate
Ans:
Superphosphate
Explanation :
Superphosphateis a common synthetic phosphorus fertilizer. It contains phosphorus and sulphur in a ratio of 1 to 1.22. It is produced by treatment of "phosphate rock" with acids such as sulphuric acid. Superphosphate is the principal carrier of phosphate, the form of phosphorus usable by plants, and is one of the world's most important fertilizers.
[14] Bauxite is used as raw material by which industry?
A.
Aluminium
B.
Iron
C.
Steel
D.
Gold
Ans:
Aluminium
Explanation :
Bauxite is the principal ore of aluminium. Bauxite is not a mineral. It is a rock formed from a laterite soil that has been severely leached of silica and other soluble materials in a wet tropical or subtropical climate. Aluminium is extracted from bauxite using the Bayer process.
[15] Which of the following is not a natural source of hydrocarbon?
A.
Natural Gas
B.
Coal
C.
Petroleum
D.
Mica
Ans:
Mica
Explanation :
There are three main natural sources of hydrocarbons: natural gas, petroleum and coal. Mica is a natural occurring mineral that is based on a collection of silicate minerals and composed of varying amounts of potassium, iron, aluminum, magnesium and water. It is widely used in the electrical industry.
[16] An acid having basicity one is -
A.
Sodium dihydrogen phosphate
B.
Disodium hydrogen phosphate
C.
Sodium phosphate
D.
Phosphoric acid
Ans:
Disodium hydrogen phosphate
Explanation :
The basicity of an acid is the number of hydrogen ions (H+) which can be produced by the ionization of one molecule of the acid in aqueous solution. For ex-ample, the basicity of hydrochloric acid is 1 since one molecule of HCl produces one H+ ion in solution. Similarly, the basicity of Disodium phosphate (Na2HPO4) is one since it has one H+ displaceable ion.
[17] Which one of the following vegetable oils is used in the manufacture of paints?
A.
Palm oil
B.
Sunflower oil
C.
Linseed oil
D.
Cottonseed oil
Ans:
Cottonseed oil
Explanation :
Linseed oil and castor oils are used mainly as drying agents in paints and varnishes. Linseed oil is generally used in the manufacture of oil paints, drying oil finish or varnish in wood finishing, as a pigment binder in oil paints, as a plasticizer and in the manufacture of linoleum.
[18] Dry ice is the solid form of :
A.
Air 7
B.
Carbon dioxide
C.
Nitrogen
D.
Water
Ans:
Carbon dioxide
Explanation :
Dry ice, sometimes referred to as "cardice," is the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and not leaving any residue. It is useful for preserving frozen foods, ice cream, etc., where mechanical cooling is unavailable.
[19] The common name of sodium bicarbonate is -
A.
Soda ash
B.
Baking soda
C.
Soda lime
D.
Baking powder
Ans:
Baking soda
Explanation :
Sodium bicarbonate (NaHCO3) is also known as baking soda, bread soda, cooking soda, and bicarbonate of soda. It is primarily used in cooking (baking), as a leavening agent. It reacts with acidic, components in batters, releasing carbon dioxide, which causes expansion of the batter and forms the characteristic texture and grain in pancakes, cakes, quick breads, etc.
[20] Which element behaves chemically both as metal and nonmetal?
A.
Argon
B.
Boron
C.
Xenon
D.
Carbon
Ans:
Boron
Explanation :
Some elements behave chemically both as metals and nonmetals, and are called metalloids. Their examples include Boron, Silicon, Germanium and Antimony. Elements which are neither metals nor non-metals are called Noble Gases.
[21] The amount of oxygen in the atmosphere remains relatively constant because it is given off by -
A.
Oceans
B.
Animals
C.
Rocks
D.
Plants
Ans:
Plants
Explanation :
Just as water moves from the sky to the earth and back in the hydrologic cycle, oxygen is also cycled through the environment. Plants mark the beginning of the oxygen cycle. They use the energy of sunlight to convert carbon dioxide and water into carbohydrates and oxygen in a process called photosynthesis.
[22] Which one of the following mineral does not contain oxygen?
A.
Haematite
B.
Bauxite
C.
Cryolite
D.
Calcite
Ans:
Cryolite
Explanation :
Cryolite (Na3AlF6), sodium hexafluoroaluminate) does not contain oxygen. It occurs as glassy, colorless, white-reddish to gray-black prismatic monoclinic crystals. Cryolite is used as an insecticide and a pesticide. It is also used to give fireworks a yellow color.
[23] Biogas majorly contains?
A.
Ethane
B.
Methane
C.
Hydrogen
D.
CO
Ans:
Methane
Explanation :
Biogas is a mixture of different gases, major portion in biogas being methane (CH4) and carbon dioxide (CO2). It also contains traces of other gases like hydrogen (H2), Moisture (H2O), hydrogen sulphide (H2S) etc.
[24] The scientific name for common salt is -
A.
Sodium hydroxide
B.
Sodium chloride
C.
Ammonium chloride
D.
Sodium hydrogencarbonate
Ans:
Sodium chloride
Explanation :
Common salt is known as sodium chloride. It is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda etc.
[25] Which of the following is a noble gas -
A.
Argon
B.
Hydrogen
C.
Oxygen
D.
Nitrogen
Ans:
Argon
Explanation :
Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Explanation :
Sulphur is a non-metal that shows allotropy in the liquid state. If sulphur is heated slowly the changes between the different forms can be observed. These changes are in the form of colour and viscosity (thickness) of the liquid. If the dark brown liquid sulphur is poured into a beaker of cold water, plastic sulphur is formed. This is an elastic, rubber-like form of sulphur.
[6] Atoms of same element having different mass numbers are Called _.
A.
Isobars
B.
Isotopes
C.
Isotones
D.
Isomers
Ans:
Isotopes
Explanation :
Atoms that have the same atomic number but different atomic masses are called isotopes. The difference in mass arises due to the atoms containing a different number of neutrons for the same number of protons. For example, carbon-12, carbon-13 and carbon-14 are three isotopes of the element carbon with mass numbers 12, 13 and 14 respectively.
[7] Bee sting contains -
A.
An acidic liquid
B.
asalt solution
C.
an alkaline liquid
D.
acorrosive liquid
Ans:
An acidic liquid
Explanation :
A bee sting is a sting from a bee (honey bee, bumblebee, sweat bee, etc.). Bee stings are acidic. So its effects can be neutralized with bicarbonate of soda or alkali and this reaction reduces the pain.
[8] The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called -
A.
Nuclear fusion
B.
Nuclear fission
C.
Nuclear reaction
D.
Fast breeding
Ans:
Nuclear fission
Explanation :
Nuclear fission is a process used to create energy. It is when an atom splits apart into smaller atoms. The process gives off a lot of energy, and is used in nuclear weapons and nuclear reactors.
[9] Which element found in all organic compounds?
A.
carbon
B.
nitrogen
C.
calcium
D.
none of them
Ans:
carbon
Explanation :
Carbon is found in all organic matter, but NOT in inorganic matter organic means chemical compounds with carbon in them. In a more general sense, organic refers to living things.
[10] J. B. Sumner isolated first enzyme from Jackbeans as-
A.
amylase
B.
trypsin
C.
urease
D.
renin
Ans:
urease
Explanation :
James Batcheller Sumner (November 19, 1887 – August 12, 1955) was an American chemist. He discovered that enzymes can be crystallized.
[11] Highest percentage of carbon is found in which form of coal?
A.
Anthracite
B.
Bituminous
C.
Peat
D.
Lignite
Ans:
Anthracite
Explanation :
Anthracite is the highest rank of coal since it has a carbon content of over 87% on a dry ash-free basis. Anthracite coal generally has the highest heating value per ton on a mineral-matter-free basis. It has a bright luster and breaks with a semi-conchoidal. fracture.
[12] The chemical that is used to ripen mangoes is -
A.
Calcium sulphide
B.
Calcium carbide
C.
Calcium carbonate
D.
Calcium chloride
Ans:
Calcium carbide
Explanation :
Calcium carbide is used for artificially ripening fruit. When calcium carbide comes in contact with moisture, it produces acetylene gas, which is quite similar in reaction to the natural ripening agent ethylene. Acetylene acts like ethylene and accelerates the ripening process.
[13] Which of the following is not a nitrogenous fetiliser?
A.
Ammonium sulphate
B.
Urea
C.
Ammonium nitrate
D.
Superphosphate
Ans:
Superphosphate
Explanation :
Superphosphateis a common synthetic phosphorus fertilizer. It contains phosphorus and sulphur in a ratio of 1 to 1.22. It is produced by treatment of "phosphate rock" with acids such as sulphuric acid. Superphosphate is the principal carrier of phosphate, the form of phosphorus usable by plants, and is one of the world's most important fertilizers.
[14] Bauxite is used as raw material by which industry?
A.
Aluminium
B.
Iron
C.
Steel
D.
Gold
Ans:
Aluminium
Explanation :
Bauxite is the principal ore of aluminium. Bauxite is not a mineral. It is a rock formed from a laterite soil that has been severely leached of silica and other soluble materials in a wet tropical or subtropical climate. Aluminium is extracted from bauxite using the Bayer process.
[15] Which of the following is not a natural source of hydrocarbon?
A.
Natural Gas
B.
Coal
C.
Petroleum
D.
Mica
Ans:
Mica
Explanation :
There are three main natural sources of hydrocarbons: natural gas, petroleum and coal. Mica is a natural occurring mineral that is based on a collection of silicate minerals and composed of varying amounts of potassium, iron, aluminum, magnesium and water. It is widely used in the electrical industry.
[16] An acid having basicity one is -
A.
Sodium dihydrogen phosphate
B.
Disodium hydrogen phosphate
C.
Sodium phosphate
D.
Phosphoric acid
Ans:
Disodium hydrogen phosphate
Explanation :
The basicity of an acid is the number of hydrogen ions (H+) which can be produced by the ionization of one molecule of the acid in aqueous solution. For ex-ample, the basicity of hydrochloric acid is 1 since one molecule of HCl produces one H+ ion in solution. Similarly, the basicity of Disodium phosphate (Na2HPO4) is one since it has one H+ displaceable ion.
[17] Which one of the following vegetable oils is used in the manufacture of paints?
A.
Palm oil
B.
Sunflower oil
C.
Linseed oil
D.
Cottonseed oil
Ans:
Cottonseed oil
Explanation :
Linseed oil and castor oils are used mainly as drying agents in paints and varnishes. Linseed oil is generally used in the manufacture of oil paints, drying oil finish or varnish in wood finishing, as a pigment binder in oil paints, as a plasticizer and in the manufacture of linoleum.
[18] Dry ice is the solid form of :
A.
Air 7
B.
Carbon dioxide
C.
Nitrogen
D.
Water
Ans:
Carbon dioxide
Explanation :
Dry ice, sometimes referred to as "cardice," is the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and not leaving any residue. It is useful for preserving frozen foods, ice cream, etc., where mechanical cooling is unavailable.
[19] The common name of sodium bicarbonate is -
A.
Soda ash
B.
Baking soda
C.
Soda lime
D.
Baking powder
Ans:
Baking soda
Explanation :
Sodium bicarbonate (NaHCO3) is also known as baking soda, bread soda, cooking soda, and bicarbonate of soda. It is primarily used in cooking (baking), as a leavening agent. It reacts with acidic, components in batters, releasing carbon dioxide, which causes expansion of the batter and forms the characteristic texture and grain in pancakes, cakes, quick breads, etc.
[20] Which element behaves chemically both as metal and nonmetal?
A.
Argon
B.
Boron
C.
Xenon
D.
Carbon
Ans:
Boron
Explanation :
Some elements behave chemically both as metals and nonmetals, and are called metalloids. Their examples include Boron, Silicon, Germanium and Antimony. Elements which are neither metals nor non-metals are called Noble Gases.
[21] The amount of oxygen in the atmosphere remains relatively constant because it is given off by -
A.
Oceans
B.
Animals
C.
Rocks
D.
Plants
Ans:
Plants
Explanation :
Just as water moves from the sky to the earth and back in the hydrologic cycle, oxygen is also cycled through the environment. Plants mark the beginning of the oxygen cycle. They use the energy of sunlight to convert carbon dioxide and water into carbohydrates and oxygen in a process called photosynthesis.
[22] Which one of the following mineral does not contain oxygen?
A.
Haematite
B.
Bauxite
C.
Cryolite
D.
Calcite
Ans:
Cryolite
Explanation :
Cryolite (Na3AlF6), sodium hexafluoroaluminate) does not contain oxygen. It occurs as glassy, colorless, white-reddish to gray-black prismatic monoclinic crystals. Cryolite is used as an insecticide and a pesticide. It is also used to give fireworks a yellow color.
[23] Biogas majorly contains?
A.
Ethane
B.
Methane
C.
Hydrogen
D.
CO
Ans:
Methane
Explanation :
Biogas is a mixture of different gases, major portion in biogas being methane (CH4) and carbon dioxide (CO2). It also contains traces of other gases like hydrogen (H2), Moisture (H2O), hydrogen sulphide (H2S) etc.
[24] The scientific name for common salt is -
A.
Sodium hydroxide
B.
Sodium chloride
C.
Ammonium chloride
D.
Sodium hydrogencarbonate
Ans:
Sodium chloride
Explanation :
Common salt is known as sodium chloride. It is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda etc.
[25] Which of the following is a noble gas -
A.
Argon
B.
Hydrogen
C.
Oxygen
D.
Nitrogen
Ans:
Argon
Explanation :
Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Explanation :
A bee sting is a sting from a bee (honey bee, bumblebee, sweat bee, etc.). Bee stings are acidic. So its effects can be neutralized with bicarbonate of soda or alkali and this reaction reduces the pain.
[8] The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called -
A.
Nuclear fusion
B.
Nuclear fission
C.
Nuclear reaction
D.
Fast breeding
Ans:
Nuclear fission
Explanation :
Nuclear fission is a process used to create energy. It is when an atom splits apart into smaller atoms. The process gives off a lot of energy, and is used in nuclear weapons and nuclear reactors.
[9] Which element found in all organic compounds?
A.
carbon
B.
nitrogen
C.
calcium
D.
none of them
Ans:
carbon
Explanation :
Carbon is found in all organic matter, but NOT in inorganic matter organic means chemical compounds with carbon in them. In a more general sense, organic refers to living things.
[10] J. B. Sumner isolated first enzyme from Jackbeans as-
A.
amylase
B.
trypsin
C.
urease
D.
renin
Ans:
urease
Explanation :
James Batcheller Sumner (November 19, 1887 – August 12, 1955) was an American chemist. He discovered that enzymes can be crystallized.
[11] Highest percentage of carbon is found in which form of coal?
A.
Anthracite
B.
Bituminous
C.
Peat
D.
Lignite
Ans:
Anthracite
Explanation :
Anthracite is the highest rank of coal since it has a carbon content of over 87% on a dry ash-free basis. Anthracite coal generally has the highest heating value per ton on a mineral-matter-free basis. It has a bright luster and breaks with a semi-conchoidal. fracture.
[12] The chemical that is used to ripen mangoes is -
A.
Calcium sulphide
B.
Calcium carbide
C.
Calcium carbonate
D.
Calcium chloride
Ans:
Calcium carbide
Explanation :
Calcium carbide is used for artificially ripening fruit. When calcium carbide comes in contact with moisture, it produces acetylene gas, which is quite similar in reaction to the natural ripening agent ethylene. Acetylene acts like ethylene and accelerates the ripening process.
[13] Which of the following is not a nitrogenous fetiliser?
A.
Ammonium sulphate
B.
Urea
C.
Ammonium nitrate
D.
Superphosphate
Ans:
Superphosphate
Explanation :
Superphosphateis a common synthetic phosphorus fertilizer. It contains phosphorus and sulphur in a ratio of 1 to 1.22. It is produced by treatment of "phosphate rock" with acids such as sulphuric acid. Superphosphate is the principal carrier of phosphate, the form of phosphorus usable by plants, and is one of the world's most important fertilizers.
[14] Bauxite is used as raw material by which industry?
A.
Aluminium
B.
Iron
C.
Steel
D.
Gold
Ans:
Aluminium
Explanation :
Bauxite is the principal ore of aluminium. Bauxite is not a mineral. It is a rock formed from a laterite soil that has been severely leached of silica and other soluble materials in a wet tropical or subtropical climate. Aluminium is extracted from bauxite using the Bayer process.
[15] Which of the following is not a natural source of hydrocarbon?
A.
Natural Gas
B.
Coal
C.
Petroleum
D.
Mica
Ans:
Mica
Explanation :
There are three main natural sources of hydrocarbons: natural gas, petroleum and coal. Mica is a natural occurring mineral that is based on a collection of silicate minerals and composed of varying amounts of potassium, iron, aluminum, magnesium and water. It is widely used in the electrical industry.
[16] An acid having basicity one is -
A.
Sodium dihydrogen phosphate
B.
Disodium hydrogen phosphate
C.
Sodium phosphate
D.
Phosphoric acid
Ans:
Disodium hydrogen phosphate
Explanation :
The basicity of an acid is the number of hydrogen ions (H+) which can be produced by the ionization of one molecule of the acid in aqueous solution. For ex-ample, the basicity of hydrochloric acid is 1 since one molecule of HCl produces one H+ ion in solution. Similarly, the basicity of Disodium phosphate (Na2HPO4) is one since it has one H+ displaceable ion.
[17] Which one of the following vegetable oils is used in the manufacture of paints?
A.
Palm oil
B.
Sunflower oil
C.
Linseed oil
D.
Cottonseed oil
Ans:
Cottonseed oil
Explanation :
Linseed oil and castor oils are used mainly as drying agents in paints and varnishes. Linseed oil is generally used in the manufacture of oil paints, drying oil finish or varnish in wood finishing, as a pigment binder in oil paints, as a plasticizer and in the manufacture of linoleum.
[18] Dry ice is the solid form of :
A.
Air 7
B.
Carbon dioxide
C.
Nitrogen
D.
Water
Ans:
Carbon dioxide
Explanation :
Dry ice, sometimes referred to as "cardice," is the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and not leaving any residue. It is useful for preserving frozen foods, ice cream, etc., where mechanical cooling is unavailable.
[19] The common name of sodium bicarbonate is -
A.
Soda ash
B.
Baking soda
C.
Soda lime
D.
Baking powder
Ans:
Baking soda
Explanation :
Sodium bicarbonate (NaHCO3) is also known as baking soda, bread soda, cooking soda, and bicarbonate of soda. It is primarily used in cooking (baking), as a leavening agent. It reacts with acidic, components in batters, releasing carbon dioxide, which causes expansion of the batter and forms the characteristic texture and grain in pancakes, cakes, quick breads, etc.
[20] Which element behaves chemically both as metal and nonmetal?
A.
Argon
B.
Boron
C.
Xenon
D.
Carbon
Ans:
Boron
Explanation :
Some elements behave chemically both as metals and nonmetals, and are called metalloids. Their examples include Boron, Silicon, Germanium and Antimony. Elements which are neither metals nor non-metals are called Noble Gases.
[21] The amount of oxygen in the atmosphere remains relatively constant because it is given off by -
A.
Oceans
B.
Animals
C.
Rocks
D.
Plants
Ans:
Plants
Explanation :
Just as water moves from the sky to the earth and back in the hydrologic cycle, oxygen is also cycled through the environment. Plants mark the beginning of the oxygen cycle. They use the energy of sunlight to convert carbon dioxide and water into carbohydrates and oxygen in a process called photosynthesis.
[22] Which one of the following mineral does not contain oxygen?
A.
Haematite
B.
Bauxite
C.
Cryolite
D.
Calcite
Ans:
Cryolite
Explanation :
Cryolite (Na3AlF6), sodium hexafluoroaluminate) does not contain oxygen. It occurs as glassy, colorless, white-reddish to gray-black prismatic monoclinic crystals. Cryolite is used as an insecticide and a pesticide. It is also used to give fireworks a yellow color.
[23] Biogas majorly contains?
A.
Ethane
B.
Methane
C.
Hydrogen
D.
CO
Ans:
Methane
Explanation :
Biogas is a mixture of different gases, major portion in biogas being methane (CH4) and carbon dioxide (CO2). It also contains traces of other gases like hydrogen (H2), Moisture (H2O), hydrogen sulphide (H2S) etc.
[24] The scientific name for common salt is -
A.
Sodium hydroxide
B.
Sodium chloride
C.
Ammonium chloride
D.
Sodium hydrogencarbonate
Ans:
Sodium chloride
Explanation :
Common salt is known as sodium chloride. It is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda etc.
[25] Which of the following is a noble gas -
A.
Argon
B.
Hydrogen
C.
Oxygen
D.
Nitrogen
Ans:
Argon
Explanation :
Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Explanation :
Carbon is found in all organic matter, but NOT in inorganic matter organic means chemical compounds with carbon in them. In a more general sense, organic refers to living things.
[10] J. B. Sumner isolated first enzyme from Jackbeans as-
A.
amylase
B.
trypsin
C.
urease
D.
renin
Ans:
urease
Explanation :
James Batcheller Sumner (November 19, 1887 – August 12, 1955) was an American chemist. He discovered that enzymes can be crystallized.
[11] Highest percentage of carbon is found in which form of coal?
A.
Anthracite
B.
Bituminous
C.
Peat
D.
Lignite
Ans:
Anthracite
Explanation :
Anthracite is the highest rank of coal since it has a carbon content of over 87% on a dry ash-free basis. Anthracite coal generally has the highest heating value per ton on a mineral-matter-free basis. It has a bright luster and breaks with a semi-conchoidal. fracture.
[12] The chemical that is used to ripen mangoes is -
A.
Calcium sulphide
B.
Calcium carbide
C.
Calcium carbonate
D.
Calcium chloride
Ans:
Calcium carbide
Explanation :
Calcium carbide is used for artificially ripening fruit. When calcium carbide comes in contact with moisture, it produces acetylene gas, which is quite similar in reaction to the natural ripening agent ethylene. Acetylene acts like ethylene and accelerates the ripening process.
[13] Which of the following is not a nitrogenous fetiliser?
A.
Ammonium sulphate
B.
Urea
C.
Ammonium nitrate
D.
Superphosphate
Ans:
Superphosphate
Explanation :
Superphosphateis a common synthetic phosphorus fertilizer. It contains phosphorus and sulphur in a ratio of 1 to 1.22. It is produced by treatment of "phosphate rock" with acids such as sulphuric acid. Superphosphate is the principal carrier of phosphate, the form of phosphorus usable by plants, and is one of the world's most important fertilizers.
[14] Bauxite is used as raw material by which industry?
A.
Aluminium
B.
Iron
C.
Steel
D.
Gold
Ans:
Aluminium
Explanation :
Bauxite is the principal ore of aluminium. Bauxite is not a mineral. It is a rock formed from a laterite soil that has been severely leached of silica and other soluble materials in a wet tropical or subtropical climate. Aluminium is extracted from bauxite using the Bayer process.
[15] Which of the following is not a natural source of hydrocarbon?
A.
Natural Gas
B.
Coal
C.
Petroleum
D.
Mica
Ans:
Mica
Explanation :
There are three main natural sources of hydrocarbons: natural gas, petroleum and coal. Mica is a natural occurring mineral that is based on a collection of silicate minerals and composed of varying amounts of potassium, iron, aluminum, magnesium and water. It is widely used in the electrical industry.
[16] An acid having basicity one is -
A.
Sodium dihydrogen phosphate
B.
Disodium hydrogen phosphate
C.
Sodium phosphate
D.
Phosphoric acid
Ans:
Disodium hydrogen phosphate
Explanation :
The basicity of an acid is the number of hydrogen ions (H+) which can be produced by the ionization of one molecule of the acid in aqueous solution. For ex-ample, the basicity of hydrochloric acid is 1 since one molecule of HCl produces one H+ ion in solution. Similarly, the basicity of Disodium phosphate (Na2HPO4) is one since it has one H+ displaceable ion.
[17] Which one of the following vegetable oils is used in the manufacture of paints?
A.
Palm oil
B.
Sunflower oil
C.
Linseed oil
D.
Cottonseed oil
Ans:
Cottonseed oil
Explanation :
Linseed oil and castor oils are used mainly as drying agents in paints and varnishes. Linseed oil is generally used in the manufacture of oil paints, drying oil finish or varnish in wood finishing, as a pigment binder in oil paints, as a plasticizer and in the manufacture of linoleum.
[18] Dry ice is the solid form of :
A.
Air 7
B.
Carbon dioxide
C.
Nitrogen
D.
Water
Ans:
Carbon dioxide
Explanation :
Dry ice, sometimes referred to as "cardice," is the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and not leaving any residue. It is useful for preserving frozen foods, ice cream, etc., where mechanical cooling is unavailable.
[19] The common name of sodium bicarbonate is -
A.
Soda ash
B.
Baking soda
C.
Soda lime
D.
Baking powder
Ans:
Baking soda
Explanation :
Sodium bicarbonate (NaHCO3) is also known as baking soda, bread soda, cooking soda, and bicarbonate of soda. It is primarily used in cooking (baking), as a leavening agent. It reacts with acidic, components in batters, releasing carbon dioxide, which causes expansion of the batter and forms the characteristic texture and grain in pancakes, cakes, quick breads, etc.
[20] Which element behaves chemically both as metal and nonmetal?
A.
Argon
B.
Boron
C.
Xenon
D.
Carbon
Ans:
Boron
Explanation :
Some elements behave chemically both as metals and nonmetals, and are called metalloids. Their examples include Boron, Silicon, Germanium and Antimony. Elements which are neither metals nor non-metals are called Noble Gases.
[21] The amount of oxygen in the atmosphere remains relatively constant because it is given off by -
A.
Oceans
B.
Animals
C.
Rocks
D.
Plants
Ans:
Plants
Explanation :
Just as water moves from the sky to the earth and back in the hydrologic cycle, oxygen is also cycled through the environment. Plants mark the beginning of the oxygen cycle. They use the energy of sunlight to convert carbon dioxide and water into carbohydrates and oxygen in a process called photosynthesis.
[22] Which one of the following mineral does not contain oxygen?
A.
Haematite
B.
Bauxite
C.
Cryolite
D.
Calcite
Ans:
Cryolite
Explanation :
Cryolite (Na3AlF6), sodium hexafluoroaluminate) does not contain oxygen. It occurs as glassy, colorless, white-reddish to gray-black prismatic monoclinic crystals. Cryolite is used as an insecticide and a pesticide. It is also used to give fireworks a yellow color.
[23] Biogas majorly contains?
A.
Ethane
B.
Methane
C.
Hydrogen
D.
CO
Ans:
Methane
Explanation :
Biogas is a mixture of different gases, major portion in biogas being methane (CH4) and carbon dioxide (CO2). It also contains traces of other gases like hydrogen (H2), Moisture (H2O), hydrogen sulphide (H2S) etc.
[24] The scientific name for common salt is -
A.
Sodium hydroxide
B.
Sodium chloride
C.
Ammonium chloride
D.
Sodium hydrogencarbonate
Ans:
Sodium chloride
Explanation :
Common salt is known as sodium chloride. It is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda etc.
[25] Which of the following is a noble gas -
A.
Argon
B.
Hydrogen
C.
Oxygen
D.
Nitrogen
Ans:
Argon
Explanation :
Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Explanation :
Anthracite is the highest rank of coal since it has a carbon content of over 87% on a dry ash-free basis. Anthracite coal generally has the highest heating value per ton on a mineral-matter-free basis. It has a bright luster and breaks with a semi-conchoidal. fracture.
[12] The chemical that is used to ripen mangoes is -
A.
Calcium sulphide
B.
Calcium carbide
C.
Calcium carbonate
D.
Calcium chloride
Ans:
Calcium carbide
Explanation :
Calcium carbide is used for artificially ripening fruit. When calcium carbide comes in contact with moisture, it produces acetylene gas, which is quite similar in reaction to the natural ripening agent ethylene. Acetylene acts like ethylene and accelerates the ripening process.
[13] Which of the following is not a nitrogenous fetiliser?
A.
Ammonium sulphate
B.
Urea
C.
Ammonium nitrate
D.
Superphosphate
Ans:
Superphosphate
Explanation :
Superphosphateis a common synthetic phosphorus fertilizer. It contains phosphorus and sulphur in a ratio of 1 to 1.22. It is produced by treatment of "phosphate rock" with acids such as sulphuric acid. Superphosphate is the principal carrier of phosphate, the form of phosphorus usable by plants, and is one of the world's most important fertilizers.
[14] Bauxite is used as raw material by which industry?
A.
Aluminium
B.
Iron
C.
Steel
D.
Gold
Ans:
Aluminium
Explanation :
Bauxite is the principal ore of aluminium. Bauxite is not a mineral. It is a rock formed from a laterite soil that has been severely leached of silica and other soluble materials in a wet tropical or subtropical climate. Aluminium is extracted from bauxite using the Bayer process.
[15] Which of the following is not a natural source of hydrocarbon?
A.
Natural Gas
B.
Coal
C.
Petroleum
D.
Mica
Ans:
Mica
Explanation :
There are three main natural sources of hydrocarbons: natural gas, petroleum and coal. Mica is a natural occurring mineral that is based on a collection of silicate minerals and composed of varying amounts of potassium, iron, aluminum, magnesium and water. It is widely used in the electrical industry.
[16] An acid having basicity one is -
A.
Sodium dihydrogen phosphate
B.
Disodium hydrogen phosphate
C.
Sodium phosphate
D.
Phosphoric acid
Ans:
Disodium hydrogen phosphate
Explanation :
The basicity of an acid is the number of hydrogen ions (H+) which can be produced by the ionization of one molecule of the acid in aqueous solution. For ex-ample, the basicity of hydrochloric acid is 1 since one molecule of HCl produces one H+ ion in solution. Similarly, the basicity of Disodium phosphate (Na2HPO4) is one since it has one H+ displaceable ion.
[17] Which one of the following vegetable oils is used in the manufacture of paints?
A.
Palm oil
B.
Sunflower oil
C.
Linseed oil
D.
Cottonseed oil
Ans:
Cottonseed oil
Explanation :
Linseed oil and castor oils are used mainly as drying agents in paints and varnishes. Linseed oil is generally used in the manufacture of oil paints, drying oil finish or varnish in wood finishing, as a pigment binder in oil paints, as a plasticizer and in the manufacture of linoleum.
[18] Dry ice is the solid form of :
A.
Air 7
B.
Carbon dioxide
C.
Nitrogen
D.
Water
Ans:
Carbon dioxide
Explanation :
Dry ice, sometimes referred to as "cardice," is the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and not leaving any residue. It is useful for preserving frozen foods, ice cream, etc., where mechanical cooling is unavailable.
[19] The common name of sodium bicarbonate is -
A.
Soda ash
B.
Baking soda
C.
Soda lime
D.
Baking powder
Ans:
Baking soda
Explanation :
Sodium bicarbonate (NaHCO3) is also known as baking soda, bread soda, cooking soda, and bicarbonate of soda. It is primarily used in cooking (baking), as a leavening agent. It reacts with acidic, components in batters, releasing carbon dioxide, which causes expansion of the batter and forms the characteristic texture and grain in pancakes, cakes, quick breads, etc.
[20] Which element behaves chemically both as metal and nonmetal?
A.
Argon
B.
Boron
C.
Xenon
D.
Carbon
Ans:
Boron
Explanation :
Some elements behave chemically both as metals and nonmetals, and are called metalloids. Their examples include Boron, Silicon, Germanium and Antimony. Elements which are neither metals nor non-metals are called Noble Gases.
[21] The amount of oxygen in the atmosphere remains relatively constant because it is given off by -
A.
Oceans
B.
Animals
C.
Rocks
D.
Plants
Ans:
Plants
Explanation :
Just as water moves from the sky to the earth and back in the hydrologic cycle, oxygen is also cycled through the environment. Plants mark the beginning of the oxygen cycle. They use the energy of sunlight to convert carbon dioxide and water into carbohydrates and oxygen in a process called photosynthesis.
[22] Which one of the following mineral does not contain oxygen?
A.
Haematite
B.
Bauxite
C.
Cryolite
D.
Calcite
Ans:
Cryolite
Explanation :
Cryolite (Na3AlF6), sodium hexafluoroaluminate) does not contain oxygen. It occurs as glassy, colorless, white-reddish to gray-black prismatic monoclinic crystals. Cryolite is used as an insecticide and a pesticide. It is also used to give fireworks a yellow color.
[23] Biogas majorly contains?
A.
Ethane
B.
Methane
C.
Hydrogen
D.
CO
Ans:
Methane
Explanation :
Biogas is a mixture of different gases, major portion in biogas being methane (CH4) and carbon dioxide (CO2). It also contains traces of other gases like hydrogen (H2), Moisture (H2O), hydrogen sulphide (H2S) etc.
[24] The scientific name for common salt is -
A.
Sodium hydroxide
B.
Sodium chloride
C.
Ammonium chloride
D.
Sodium hydrogencarbonate
Ans:
Sodium chloride
Explanation :
Common salt is known as sodium chloride. It is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda etc.
[25] Which of the following is a noble gas -
A.
Argon
B.
Hydrogen
C.
Oxygen
D.
Nitrogen
Ans:
Argon
Explanation :
Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Explanation :
Superphosphateis a common synthetic phosphorus fertilizer. It contains phosphorus and sulphur in a ratio of 1 to 1.22. It is produced by treatment of "phosphate rock" with acids such as sulphuric acid. Superphosphate is the principal carrier of phosphate, the form of phosphorus usable by plants, and is one of the world's most important fertilizers.
[14] Bauxite is used as raw material by which industry?
A.
Aluminium
B.
Iron
C.
Steel
D.
Gold
Ans:
Aluminium
Explanation :
Bauxite is the principal ore of aluminium. Bauxite is not a mineral. It is a rock formed from a laterite soil that has been severely leached of silica and other soluble materials in a wet tropical or subtropical climate. Aluminium is extracted from bauxite using the Bayer process.
[15] Which of the following is not a natural source of hydrocarbon?
A.
Natural Gas
B.
Coal
C.
Petroleum
D.
Mica
Ans:
Mica
Explanation :
There are three main natural sources of hydrocarbons: natural gas, petroleum and coal. Mica is a natural occurring mineral that is based on a collection of silicate minerals and composed of varying amounts of potassium, iron, aluminum, magnesium and water. It is widely used in the electrical industry.
[16] An acid having basicity one is -
A.
Sodium dihydrogen phosphate
B.
Disodium hydrogen phosphate
C.
Sodium phosphate
D.
Phosphoric acid
Ans:
Disodium hydrogen phosphate
Explanation :
The basicity of an acid is the number of hydrogen ions (H+) which can be produced by the ionization of one molecule of the acid in aqueous solution. For ex-ample, the basicity of hydrochloric acid is 1 since one molecule of HCl produces one H+ ion in solution. Similarly, the basicity of Disodium phosphate (Na2HPO4) is one since it has one H+ displaceable ion.
[17] Which one of the following vegetable oils is used in the manufacture of paints?
A.
Palm oil
B.
Sunflower oil
C.
Linseed oil
D.
Cottonseed oil
Ans:
Cottonseed oil
Explanation :
Linseed oil and castor oils are used mainly as drying agents in paints and varnishes. Linseed oil is generally used in the manufacture of oil paints, drying oil finish or varnish in wood finishing, as a pigment binder in oil paints, as a plasticizer and in the manufacture of linoleum.
[18] Dry ice is the solid form of :
A.
Air 7
B.
Carbon dioxide
C.
Nitrogen
D.
Water
Ans:
Carbon dioxide
Explanation :
Dry ice, sometimes referred to as "cardice," is the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and not leaving any residue. It is useful for preserving frozen foods, ice cream, etc., where mechanical cooling is unavailable.
[19] The common name of sodium bicarbonate is -
A.
Soda ash
B.
Baking soda
C.
Soda lime
D.
Baking powder
Ans:
Baking soda
Explanation :
Sodium bicarbonate (NaHCO3) is also known as baking soda, bread soda, cooking soda, and bicarbonate of soda. It is primarily used in cooking (baking), as a leavening agent. It reacts with acidic, components in batters, releasing carbon dioxide, which causes expansion of the batter and forms the characteristic texture and grain in pancakes, cakes, quick breads, etc.
[20] Which element behaves chemically both as metal and nonmetal?
A.
Argon
B.
Boron
C.
Xenon
D.
Carbon
Ans:
Boron
Explanation :
Some elements behave chemically both as metals and nonmetals, and are called metalloids. Their examples include Boron, Silicon, Germanium and Antimony. Elements which are neither metals nor non-metals are called Noble Gases.
[21] The amount of oxygen in the atmosphere remains relatively constant because it is given off by -
A.
Oceans
B.
Animals
C.
Rocks
D.
Plants
Ans:
Plants
Explanation :
Just as water moves from the sky to the earth and back in the hydrologic cycle, oxygen is also cycled through the environment. Plants mark the beginning of the oxygen cycle. They use the energy of sunlight to convert carbon dioxide and water into carbohydrates and oxygen in a process called photosynthesis.
[22] Which one of the following mineral does not contain oxygen?
A.
Haematite
B.
Bauxite
C.
Cryolite
D.
Calcite
Ans:
Cryolite
Explanation :
Cryolite (Na3AlF6), sodium hexafluoroaluminate) does not contain oxygen. It occurs as glassy, colorless, white-reddish to gray-black prismatic monoclinic crystals. Cryolite is used as an insecticide and a pesticide. It is also used to give fireworks a yellow color.
[23] Biogas majorly contains?
A.
Ethane
B.
Methane
C.
Hydrogen
D.
CO
Ans:
Methane
Explanation :
Biogas is a mixture of different gases, major portion in biogas being methane (CH4) and carbon dioxide (CO2). It also contains traces of other gases like hydrogen (H2), Moisture (H2O), hydrogen sulphide (H2S) etc.
[24] The scientific name for common salt is -
A.
Sodium hydroxide
B.
Sodium chloride
C.
Ammonium chloride
D.
Sodium hydrogencarbonate
Ans:
Sodium chloride
Explanation :
Common salt is known as sodium chloride. It is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda etc.
[25] Which of the following is a noble gas -
A.
Argon
B.
Hydrogen
C.
Oxygen
D.
Nitrogen
Ans:
Argon
Explanation :
Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Explanation :
There are three main natural sources of hydrocarbons: natural gas, petroleum and coal. Mica is a natural occurring mineral that is based on a collection of silicate minerals and composed of varying amounts of potassium, iron, aluminum, magnesium and water. It is widely used in the electrical industry.
[16] An acid having basicity one is -
A.
Sodium dihydrogen phosphate
B.
Disodium hydrogen phosphate
C.
Sodium phosphate
D.
Phosphoric acid
Ans:
Disodium hydrogen phosphate
Explanation :
The basicity of an acid is the number of hydrogen ions (H+) which can be produced by the ionization of one molecule of the acid in aqueous solution. For ex-ample, the basicity of hydrochloric acid is 1 since one molecule of HCl produces one H+ ion in solution. Similarly, the basicity of Disodium phosphate (Na2HPO4) is one since it has one H+ displaceable ion.
[17] Which one of the following vegetable oils is used in the manufacture of paints?
A.
Palm oil
B.
Sunflower oil
C.
Linseed oil
D.
Cottonseed oil
Ans:
Cottonseed oil
Explanation :
Linseed oil and castor oils are used mainly as drying agents in paints and varnishes. Linseed oil is generally used in the manufacture of oil paints, drying oil finish or varnish in wood finishing, as a pigment binder in oil paints, as a plasticizer and in the manufacture of linoleum.
[18] Dry ice is the solid form of :
A.
Air 7
B.
Carbon dioxide
C.
Nitrogen
D.
Water
Ans:
Carbon dioxide
Explanation :
Dry ice, sometimes referred to as "cardice," is the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and not leaving any residue. It is useful for preserving frozen foods, ice cream, etc., where mechanical cooling is unavailable.
[19] The common name of sodium bicarbonate is -
A.
Soda ash
B.
Baking soda
C.
Soda lime
D.
Baking powder
Ans:
Baking soda
Explanation :
Sodium bicarbonate (NaHCO3) is also known as baking soda, bread soda, cooking soda, and bicarbonate of soda. It is primarily used in cooking (baking), as a leavening agent. It reacts with acidic, components in batters, releasing carbon dioxide, which causes expansion of the batter and forms the characteristic texture and grain in pancakes, cakes, quick breads, etc.
[20] Which element behaves chemically both as metal and nonmetal?
A.
Argon
B.
Boron
C.
Xenon
D.
Carbon
Ans:
Boron
Explanation :
Some elements behave chemically both as metals and nonmetals, and are called metalloids. Their examples include Boron, Silicon, Germanium and Antimony. Elements which are neither metals nor non-metals are called Noble Gases.
[21] The amount of oxygen in the atmosphere remains relatively constant because it is given off by -
A.
Oceans
B.
Animals
C.
Rocks
D.
Plants
Ans:
Plants
Explanation :
Just as water moves from the sky to the earth and back in the hydrologic cycle, oxygen is also cycled through the environment. Plants mark the beginning of the oxygen cycle. They use the energy of sunlight to convert carbon dioxide and water into carbohydrates and oxygen in a process called photosynthesis.
[22] Which one of the following mineral does not contain oxygen?
A.
Haematite
B.
Bauxite
C.
Cryolite
D.
Calcite
Ans:
Cryolite
Explanation :
Cryolite (Na3AlF6), sodium hexafluoroaluminate) does not contain oxygen. It occurs as glassy, colorless, white-reddish to gray-black prismatic monoclinic crystals. Cryolite is used as an insecticide and a pesticide. It is also used to give fireworks a yellow color.
[23] Biogas majorly contains?
A.
Ethane
B.
Methane
C.
Hydrogen
D.
CO
Ans:
Methane
Explanation :
Biogas is a mixture of different gases, major portion in biogas being methane (CH4) and carbon dioxide (CO2). It also contains traces of other gases like hydrogen (H2), Moisture (H2O), hydrogen sulphide (H2S) etc.
[24] The scientific name for common salt is -
A.
Sodium hydroxide
B.
Sodium chloride
C.
Ammonium chloride
D.
Sodium hydrogencarbonate
Ans:
Sodium chloride
Explanation :
Common salt is known as sodium chloride. It is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda etc.
[25] Which of the following is a noble gas -
A.
Argon
B.
Hydrogen
C.
Oxygen
D.
Nitrogen
Ans:
Argon
Explanation :
Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Explanation :
Linseed oil and castor oils are used mainly as drying agents in paints and varnishes. Linseed oil is generally used in the manufacture of oil paints, drying oil finish or varnish in wood finishing, as a pigment binder in oil paints, as a plasticizer and in the manufacture of linoleum.
[18] Dry ice is the solid form of :
A.
Air 7
B.
Carbon dioxide
C.
Nitrogen
D.
Water
Ans:
Carbon dioxide
Explanation :
Dry ice, sometimes referred to as "cardice," is the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and not leaving any residue. It is useful for preserving frozen foods, ice cream, etc., where mechanical cooling is unavailable.
[19] The common name of sodium bicarbonate is -
A.
Soda ash
B.
Baking soda
C.
Soda lime
D.
Baking powder
Ans:
Baking soda
Explanation :
Sodium bicarbonate (NaHCO3) is also known as baking soda, bread soda, cooking soda, and bicarbonate of soda. It is primarily used in cooking (baking), as a leavening agent. It reacts with acidic, components in batters, releasing carbon dioxide, which causes expansion of the batter and forms the characteristic texture and grain in pancakes, cakes, quick breads, etc.
[20] Which element behaves chemically both as metal and nonmetal?
A.
Argon
B.
Boron
C.
Xenon
D.
Carbon
Ans:
Boron
Explanation :
Some elements behave chemically both as metals and nonmetals, and are called metalloids. Their examples include Boron, Silicon, Germanium and Antimony. Elements which are neither metals nor non-metals are called Noble Gases.
[21] The amount of oxygen in the atmosphere remains relatively constant because it is given off by -
A.
Oceans
B.
Animals
C.
Rocks
D.
Plants
Ans:
Plants
Explanation :
Just as water moves from the sky to the earth and back in the hydrologic cycle, oxygen is also cycled through the environment. Plants mark the beginning of the oxygen cycle. They use the energy of sunlight to convert carbon dioxide and water into carbohydrates and oxygen in a process called photosynthesis.
[22] Which one of the following mineral does not contain oxygen?
A.
Haematite
B.
Bauxite
C.
Cryolite
D.
Calcite
Ans:
Cryolite
Explanation :
Cryolite (Na3AlF6), sodium hexafluoroaluminate) does not contain oxygen. It occurs as glassy, colorless, white-reddish to gray-black prismatic monoclinic crystals. Cryolite is used as an insecticide and a pesticide. It is also used to give fireworks a yellow color.
[23] Biogas majorly contains?
A.
Ethane
B.
Methane
C.
Hydrogen
D.
CO
Ans:
Methane
Explanation :
Biogas is a mixture of different gases, major portion in biogas being methane (CH4) and carbon dioxide (CO2). It also contains traces of other gases like hydrogen (H2), Moisture (H2O), hydrogen sulphide (H2S) etc.
[24] The scientific name for common salt is -
A.
Sodium hydroxide
B.
Sodium chloride
C.
Ammonium chloride
D.
Sodium hydrogencarbonate
Ans:
Sodium chloride
Explanation :
Common salt is known as sodium chloride. It is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda etc.
[25] Which of the following is a noble gas -
A.
Argon
B.
Hydrogen
C.
Oxygen
D.
Nitrogen
Ans:
Argon
Explanation :
Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Explanation :
Sodium bicarbonate (NaHCO3) is also known as baking soda, bread soda, cooking soda, and bicarbonate of soda. It is primarily used in cooking (baking), as a leavening agent. It reacts with acidic, components in batters, releasing carbon dioxide, which causes expansion of the batter and forms the characteristic texture and grain in pancakes, cakes, quick breads, etc.
[20] Which element behaves chemically both as metal and nonmetal?
A.
Argon
B.
Boron
C.
Xenon
D.
Carbon
Ans:
Boron
Explanation :
Some elements behave chemically both as metals and nonmetals, and are called metalloids. Their examples include Boron, Silicon, Germanium and Antimony. Elements which are neither metals nor non-metals are called Noble Gases.
[21] The amount of oxygen in the atmosphere remains relatively constant because it is given off by -
A.
Oceans
B.
Animals
C.
Rocks
D.
Plants
Ans:
Plants
Explanation :
Just as water moves from the sky to the earth and back in the hydrologic cycle, oxygen is also cycled through the environment. Plants mark the beginning of the oxygen cycle. They use the energy of sunlight to convert carbon dioxide and water into carbohydrates and oxygen in a process called photosynthesis.
[22] Which one of the following mineral does not contain oxygen?
A.
Haematite
B.
Bauxite
C.
Cryolite
D.
Calcite
Ans:
Cryolite
Explanation :
Cryolite (Na3AlF6), sodium hexafluoroaluminate) does not contain oxygen. It occurs as glassy, colorless, white-reddish to gray-black prismatic monoclinic crystals. Cryolite is used as an insecticide and a pesticide. It is also used to give fireworks a yellow color.
[23] Biogas majorly contains?
A.
Ethane
B.
Methane
C.
Hydrogen
D.
CO
Ans:
Methane
Explanation :
Biogas is a mixture of different gases, major portion in biogas being methane (CH4) and carbon dioxide (CO2). It also contains traces of other gases like hydrogen (H2), Moisture (H2O), hydrogen sulphide (H2S) etc.
[24] The scientific name for common salt is -
A.
Sodium hydroxide
B.
Sodium chloride
C.
Ammonium chloride
D.
Sodium hydrogencarbonate
Ans:
Sodium chloride
Explanation :
Common salt is known as sodium chloride. It is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda etc.
[25] Which of the following is a noble gas -
A.
Argon
B.
Hydrogen
C.
Oxygen
D.
Nitrogen
Ans:
Argon
Explanation :
Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Explanation :
Just as water moves from the sky to the earth and back in the hydrologic cycle, oxygen is also cycled through the environment. Plants mark the beginning of the oxygen cycle. They use the energy of sunlight to convert carbon dioxide and water into carbohydrates and oxygen in a process called photosynthesis.
[22] Which one of the following mineral does not contain oxygen?
A.
Haematite
B.
Bauxite
C.
Cryolite
D.
Calcite
Ans:
Cryolite
Explanation :
Cryolite (Na3AlF6), sodium hexafluoroaluminate) does not contain oxygen. It occurs as glassy, colorless, white-reddish to gray-black prismatic monoclinic crystals. Cryolite is used as an insecticide and a pesticide. It is also used to give fireworks a yellow color.
[23] Biogas majorly contains?
A.
Ethane
B.
Methane
C.
Hydrogen
D.
CO
Ans:
Methane
Explanation :
Biogas is a mixture of different gases, major portion in biogas being methane (CH4) and carbon dioxide (CO2). It also contains traces of other gases like hydrogen (H2), Moisture (H2O), hydrogen sulphide (H2S) etc.
[24] The scientific name for common salt is -
A.
Sodium hydroxide
B.
Sodium chloride
C.
Ammonium chloride
D.
Sodium hydrogencarbonate
Ans:
Sodium chloride
Explanation :
Common salt is known as sodium chloride. It is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda etc.
[25] Which of the following is a noble gas -
A.
Argon
B.
Hydrogen
C.
Oxygen
D.
Nitrogen
Ans:
Argon
Explanation :
Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Explanation :
Biogas is a mixture of different gases, major portion in biogas being methane (CH4) and carbon dioxide (CO2). It also contains traces of other gases like hydrogen (H2), Moisture (H2O), hydrogen sulphide (H2S) etc.
[24] The scientific name for common salt is -
A.
Sodium hydroxide
B.
Sodium chloride
C.
Ammonium chloride
D.
Sodium hydrogencarbonate
Ans:
Sodium chloride
Explanation :
Common salt is known as sodium chloride. It is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda etc.
[25] Which of the following is a noble gas -
A.
Argon
B.
Hydrogen
C.
Oxygen
D.
Nitrogen
Ans:
Argon
Explanation :
Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Explanation :
Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).