[1] Taj Mahal is greatly affected due to –
A.
Tourists
B.
Acid rain
C.
Deforestation
D.
Sound pollution
Ans:
Acid rain
Explanation :
When sulphur pollutants fall on to buildings made from limestone and sandstone they react with minerals in the stone to form a powdery substance that can be washed away by rain. This is down as acid rain. Famous buildings like the Statue of Liberty in New York, the Taj Mahal in India and St. Paul's Cathedral in London have all been damaged by this sort of air pollution.
[2] The most abundant constituent of atmospheric air is –
A.
carbon
B.
hydrogen
C.
oxygen
D.
nitrogen
Ans:
nitrogen
Explanation :
Air is the name given to the atmosphere used in breathing and photosynthesis. Dry air contains roughly (by volume) 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases.
[3] In the periodic table of elements, on moving from left to right across a period, the atomic radius –
A.
decreases
B.
increases
C.
remains unchanged
D.
does not follow a definite pattern
Ans:
decreases
Explanation :
The atomic radius is the distance from the atomic nucleus to the outermost stable electron orbital in an atom that is at equilibrium. It tends to decrease across a period from left to right. It usually increases while going down a group due to the addition of a new energy level (shell).
[4] The wire of flash bulbs is made up of –
A.
Mg
B.
Ba
C.
Cu
D.
Ag
Ans:
Mg
Explanation :
The wire of flash bulbs is made up of magnesium. Magnesium filaments are contained in bulbs fil led with oxygen gas, and electrically ignited by a contact in the camera shutter.
[5] Which of the following has the highest penetrating power?
A.
a-ray
B.
b-ray
C.
y-ray
D.
δ-ray
Ans:
y-ray
Explanation :
The penetrating power is inversely related to size. Alpha particles, being the largest, penetrate the least. Gamma rays are the most penetrating of the radiations. They are highly energetic waves and are poor at ionising other atoms or molecules.
[6] Radiations which is not emitted during radioactivity is –
A.
α rays
B.
β rays
C.
γ rays
D.
Cathode rays
Ans:
Cathode rays
Explanation :
Radioactivity is the process by which a nucleus of an unstable atom loses energy by emitting particles of ionizing radiation. It includes the emission of energetic alpha particles (α), beta particles (β), and gamma rays.
[7] Citric acid is present in free form in –
A.
Tamarind
B.
Milk
C.
Apple
D.
Lemon
Ans:
Lemon
Explanation :
Lemons, oranges, limes, and other citrus fruits naturally possess high concentrations of citric acid. The juice of the lemon is about 5% to 6% citric acid, which gives lemons a sow-taste. In fact, Citric acid was first isolated in 1784 by the chemist Carl Wilhelm Scheele, who crystallized it from lemon juice.
[8] Ultraviolet rays can be used in water treatment as –
A.
Flocculator
B.
Precipitator
C.
Hydrolyser
D.
Disinfectant
Ans:
Disinfectant
Explanation :
UV radiation can be an effective viricide and bactericide. Disinfection using UV radiation is commonly used in wastewater treatment applications and is finding an increased usage in drinking water treatment.
[9] The heaviest naturally occurring element is:
A.
Mercury
B.
Poloni
C.
Thorium
D.
Uranium
Ans:
Uranium
Explanation :
The heaviest element in terms of heaviest per a given number of atoms is the element with the highest atomic weight. This is the element with the larg st number of protons, which is presently element 118, Unanoctium. Ununoctium is the heaviest element, but it is man-made. The heaviest naturally-occurring element is uranium (atomic number 92, atomic weight 238.0289).
[10] Vinegar is used as a condiment, and in the pickling of vegetables and other foods. What is the constituent of vinegar?
A.
Butanoic acid
B.
Methanoic acid
C.
Ethanoic acid
D.
Hexanoic acid
Ans:
Ethanoic acid
Explanation :
When ethanol reacts with oxygen it forms a weak acid called ethanoic acid. In an open bottle of beer or wine, the reaction happens naturally in the presence of bacteria, and it is the ethanoic acid that can make beer or wine taste sour.
[11] Which of the following is used as a moderator in nuclear reactors?
A.
Thorium
B.
Graphite
C.
Ordinary water
D.
Radium
Ans:
Graphite
Explanation :
In nuclear reactors, a neutron moderator is a medium that regulates or reduces the speed of fast neutrons, turning them into thermal neutron moderator in many nuclear reactors.
[12] The inert gas which is substituted for nitrogen in the air used by deep sea divers for Breathing is:
A.
Neon
B.
Argon
C.
Krypton
D.
Helium
Ans:
Helium
Explanation :
Helium is used since it has very low (almost non-existent) narcotic properties. The nitrogen in air is highly narcotic at depth and adding helium allows one to dive without the effects of narcosis (where one's mind is impaired).
[13] Asbestos is formed of :
A.
Calcium and Magnesium
B.
Copper, Zinc and Manganese
C.
Lead and Iron
D.
Calcium and Zinc
Ans:
Calcium and Magnesium
Explanation :
Pure and simple, asbestos is a group of naturally occurring minerals. It is composed of calcium and magnesium silicate. Asbestos occurs as veins in rocks and is mined from the ground, similar to coal.
[14] Energy posses by a body in motion is called -
A.
Kinetic Energy
B.
Potential Energy
C.
Both of Above
D.
None of Above
Ans:
Kinetic Energy
Explanation :
Energy posses by a body in motion is called Kinetic Energy. In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
[15] Natural rubber is a polymer derived from?
A.
ethylene
B.
propylene
C.
isoprene
D.
butadiene
Ans:
isoprene
Explanation :
Natural rubber is an addition polymer that is obtained as a milky white fluid known as latex from a tropical rubber tree.
[16] The value of Avogadro Number is -
A.
6.023 x 1022
B.
6.023 x 1023
C.
6.023 x 1024
D.
6.023 x 1025
Ans:
6.023 x 1023
Explanation :
In chemistry and physics, the Avogadro constant is defined as the number of constituent particles (usually atoms or molecules) in one mole of a given substance. It has dimensions of reciprocal mol and its value is equal to.
[17] In silvery paints, the main constituent present is -
A.
Aluminium powder
B.
Silver powder
C.
Lead powder
D.
White lead
Ans:
Aluminium powder
Explanation :
In silvery paints, the main constituent is aluminium powder.
[18] Which one of the following is-a greenhouse gas?
A.
Nitrogen
B.
Helium
C.
Carbon dioxide
D.
Sulphur dioxide
Ans:
Carbon dioxide
Explanation :
Gases which absorb outgoing terrestrial rediation are called greenhouse gases, such as water vapour, methane, chloro-fluorocarbons, and carbon dioxide.
[19] The gas involved in Bhopal incident was -
A.
Hydrogen sulphide
B.
Nitrogen dioxide
C.
Methyl chloride
D.
Methyl isocyanide
Ans:
Methyl isocyanide
Explanation :
The Bhopal gas tragedy involved the leakage of poisonous methyl isocyanate (MIC) gas and other chemicals at the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh, on the night of 2–3 December 1984. It is considered the world’s worst industrial disaster.
[20] Alcohol prepared by the distillation of wood is:
A.
Propyl alcohol
B.
Methyl alcohol
C.
Ethyl alcohol
D.
Glycerolx
Ans:
Methyl alcohol
Explanation :
Alcohol prepared by the distillation of wood is Methyl alcohol. It is also called wood spirit.
[21] The metal that is used as a catalyst in the hydrogenation of oils is -
A.
Pb
B.
Ni
C.
Cu
D.
Pt
Ans:
Ni
Explanation :
Ni as catalyst binds both the H2 and the unsaturated substrate and facilitates their union which is the mechanism of hydrogenation of oil while other given element can't able to do so. Ni is used for most reaction as the catalyst because of it is cheaper to run the reaction with it, in commercial world cost- effectiveness is best and desired pathway.
[22] The particle required to continue the chain process of Uranium fission is –
A.
Electron
B.
Proton
C.
Neutron
D.
Positron
Ans:
Neutron
Explanation :
Fission as encountered in the modern world is usually a deliberately produced man-made nuclear reaction induced by a neutron. The nuclear fuels undergo fission when struck by fission neutrons, and in turn emit neutrons when they break apart. This makes possible a self-sustaining nuclear chain reaction that releases energy at a controlled rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.
[23] Which of the following is used to increase the anti-knocking property of petrol?
A.
Tetramethyl lead
B.
Tetraethyl lead
C.
nimethyl lead
D.
Triethyl lead
Ans:
Tetraethyl lead
Explanation :
An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel's octane rating by raising the temperature and pressure at which ignition occurs. Tetraethyllead was admixed with gasoline (petrol) beginning in the 1920s as an inexpensive octane booster which allowed engine compression to be raised substantially, which in turn increased vehicle performance and fuel economy.
[24] Chemical name of bleaching powder is –
A.
Calcium chlorate
B.
Calcium hypochlorite
C.
Calcium chloro hypochlorite
D.
Calcium bi chloride
Ans:
Calcium hypochlorite
Explanation :
Calcium hypochlorite is a chemical compound with formula Ca(ClO)2. It is widely used for water treatment and as a bleaching agent. This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochlorite.
[25] Alcoholic OH) group can be identified by :
A.
Tolien's Reagent Test
B.
Esterification Test
C.
FeCl3 Test
D.
Ozonolysis Reaction
Ans:
FeCl3 Test
Explanation :
As phenol is an aromatic alcohol, so FeCl3 test is a test for alcohol and esterificaton test is also a test for alcohol. The ferric chloride test is used to determine the presence or absence of phenols in a given sample (for instance natural phenols in a plant extract).
Explanation :
When sulphur pollutants fall on to buildings made from limestone and sandstone they react with minerals in the stone to form a powdery substance that can be washed away by rain. This is down as acid rain. Famous buildings like the Statue of Liberty in New York, the Taj Mahal in India and St. Paul's Cathedral in London have all been damaged by this sort of air pollution.
[2] The most abundant constituent of atmospheric air is –
A.
carbon
B.
hydrogen
C.
oxygen
D.
nitrogen
Ans:
nitrogen
Explanation :
Air is the name given to the atmosphere used in breathing and photosynthesis. Dry air contains roughly (by volume) 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases.
[3] In the periodic table of elements, on moving from left to right across a period, the atomic radius –
A.
decreases
B.
increases
C.
remains unchanged
D.
does not follow a definite pattern
Ans:
decreases
Explanation :
The atomic radius is the distance from the atomic nucleus to the outermost stable electron orbital in an atom that is at equilibrium. It tends to decrease across a period from left to right. It usually increases while going down a group due to the addition of a new energy level (shell).
[4] The wire of flash bulbs is made up of –
A.
Mg
B.
Ba
C.
Cu
D.
Ag
Ans:
Mg
Explanation :
The wire of flash bulbs is made up of magnesium. Magnesium filaments are contained in bulbs fil led with oxygen gas, and electrically ignited by a contact in the camera shutter.
[5] Which of the following has the highest penetrating power?
A.
a-ray
B.
b-ray
C.
y-ray
D.
δ-ray
Ans:
y-ray
Explanation :
The penetrating power is inversely related to size. Alpha particles, being the largest, penetrate the least. Gamma rays are the most penetrating of the radiations. They are highly energetic waves and are poor at ionising other atoms or molecules.
[6] Radiations which is not emitted during radioactivity is –
A.
α rays
B.
β rays
C.
γ rays
D.
Cathode rays
Ans:
Cathode rays
Explanation :
Radioactivity is the process by which a nucleus of an unstable atom loses energy by emitting particles of ionizing radiation. It includes the emission of energetic alpha particles (α), beta particles (β), and gamma rays.
[7] Citric acid is present in free form in –
A.
Tamarind
B.
Milk
C.
Apple
D.
Lemon
Ans:
Lemon
Explanation :
Lemons, oranges, limes, and other citrus fruits naturally possess high concentrations of citric acid. The juice of the lemon is about 5% to 6% citric acid, which gives lemons a sow-taste. In fact, Citric acid was first isolated in 1784 by the chemist Carl Wilhelm Scheele, who crystallized it from lemon juice.
[8] Ultraviolet rays can be used in water treatment as –
A.
Flocculator
B.
Precipitator
C.
Hydrolyser
D.
Disinfectant
Ans:
Disinfectant
Explanation :
UV radiation can be an effective viricide and bactericide. Disinfection using UV radiation is commonly used in wastewater treatment applications and is finding an increased usage in drinking water treatment.
[9] The heaviest naturally occurring element is:
A.
Mercury
B.
Poloni
C.
Thorium
D.
Uranium
Ans:
Uranium
Explanation :
The heaviest element in terms of heaviest per a given number of atoms is the element with the highest atomic weight. This is the element with the larg st number of protons, which is presently element 118, Unanoctium. Ununoctium is the heaviest element, but it is man-made. The heaviest naturally-occurring element is uranium (atomic number 92, atomic weight 238.0289).
[10] Vinegar is used as a condiment, and in the pickling of vegetables and other foods. What is the constituent of vinegar?
A.
Butanoic acid
B.
Methanoic acid
C.
Ethanoic acid
D.
Hexanoic acid
Ans:
Ethanoic acid
Explanation :
When ethanol reacts with oxygen it forms a weak acid called ethanoic acid. In an open bottle of beer or wine, the reaction happens naturally in the presence of bacteria, and it is the ethanoic acid that can make beer or wine taste sour.
[11] Which of the following is used as a moderator in nuclear reactors?
A.
Thorium
B.
Graphite
C.
Ordinary water
D.
Radium
Ans:
Graphite
Explanation :
In nuclear reactors, a neutron moderator is a medium that regulates or reduces the speed of fast neutrons, turning them into thermal neutron moderator in many nuclear reactors.
[12] The inert gas which is substituted for nitrogen in the air used by deep sea divers for Breathing is:
A.
Neon
B.
Argon
C.
Krypton
D.
Helium
Ans:
Helium
Explanation :
Helium is used since it has very low (almost non-existent) narcotic properties. The nitrogen in air is highly narcotic at depth and adding helium allows one to dive without the effects of narcosis (where one's mind is impaired).
[13] Asbestos is formed of :
A.
Calcium and Magnesium
B.
Copper, Zinc and Manganese
C.
Lead and Iron
D.
Calcium and Zinc
Ans:
Calcium and Magnesium
Explanation :
Pure and simple, asbestos is a group of naturally occurring minerals. It is composed of calcium and magnesium silicate. Asbestos occurs as veins in rocks and is mined from the ground, similar to coal.
[14] Energy posses by a body in motion is called -
A.
Kinetic Energy
B.
Potential Energy
C.
Both of Above
D.
None of Above
Ans:
Kinetic Energy
Explanation :
Energy posses by a body in motion is called Kinetic Energy. In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
[15] Natural rubber is a polymer derived from?
A.
ethylene
B.
propylene
C.
isoprene
D.
butadiene
Ans:
isoprene
Explanation :
Natural rubber is an addition polymer that is obtained as a milky white fluid known as latex from a tropical rubber tree.
[16] The value of Avogadro Number is -
A.
6.023 x 1022
B.
6.023 x 1023
C.
6.023 x 1024
D.
6.023 x 1025
Ans:
6.023 x 1023
Explanation :
In chemistry and physics, the Avogadro constant is defined as the number of constituent particles (usually atoms or molecules) in one mole of a given substance. It has dimensions of reciprocal mol and its value is equal to.
[17] In silvery paints, the main constituent present is -
A.
Aluminium powder
B.
Silver powder
C.
Lead powder
D.
White lead
Ans:
Aluminium powder
Explanation :
In silvery paints, the main constituent is aluminium powder.
[18] Which one of the following is-a greenhouse gas?
A.
Nitrogen
B.
Helium
C.
Carbon dioxide
D.
Sulphur dioxide
Ans:
Carbon dioxide
Explanation :
Gases which absorb outgoing terrestrial rediation are called greenhouse gases, such as water vapour, methane, chloro-fluorocarbons, and carbon dioxide.
[19] The gas involved in Bhopal incident was -
A.
Hydrogen sulphide
B.
Nitrogen dioxide
C.
Methyl chloride
D.
Methyl isocyanide
Ans:
Methyl isocyanide
Explanation :
The Bhopal gas tragedy involved the leakage of poisonous methyl isocyanate (MIC) gas and other chemicals at the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh, on the night of 2–3 December 1984. It is considered the world’s worst industrial disaster.
[20] Alcohol prepared by the distillation of wood is:
A.
Propyl alcohol
B.
Methyl alcohol
C.
Ethyl alcohol
D.
Glycerolx
Ans:
Methyl alcohol
Explanation :
Alcohol prepared by the distillation of wood is Methyl alcohol. It is also called wood spirit.
[21] The metal that is used as a catalyst in the hydrogenation of oils is -
A.
Pb
B.
Ni
C.
Cu
D.
Pt
Ans:
Ni
Explanation :
Ni as catalyst binds both the H2 and the unsaturated substrate and facilitates their union which is the mechanism of hydrogenation of oil while other given element can't able to do so. Ni is used for most reaction as the catalyst because of it is cheaper to run the reaction with it, in commercial world cost- effectiveness is best and desired pathway.
[22] The particle required to continue the chain process of Uranium fission is –
A.
Electron
B.
Proton
C.
Neutron
D.
Positron
Ans:
Neutron
Explanation :
Fission as encountered in the modern world is usually a deliberately produced man-made nuclear reaction induced by a neutron. The nuclear fuels undergo fission when struck by fission neutrons, and in turn emit neutrons when they break apart. This makes possible a self-sustaining nuclear chain reaction that releases energy at a controlled rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.
[23] Which of the following is used to increase the anti-knocking property of petrol?
A.
Tetramethyl lead
B.
Tetraethyl lead
C.
nimethyl lead
D.
Triethyl lead
Ans:
Tetraethyl lead
Explanation :
An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel's octane rating by raising the temperature and pressure at which ignition occurs. Tetraethyllead was admixed with gasoline (petrol) beginning in the 1920s as an inexpensive octane booster which allowed engine compression to be raised substantially, which in turn increased vehicle performance and fuel economy.
[24] Chemical name of bleaching powder is –
A.
Calcium chlorate
B.
Calcium hypochlorite
C.
Calcium chloro hypochlorite
D.
Calcium bi chloride
Ans:
Calcium hypochlorite
Explanation :
Calcium hypochlorite is a chemical compound with formula Ca(ClO)2. It is widely used for water treatment and as a bleaching agent. This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochlorite.
[25] Alcoholic OH) group can be identified by :
A.
Tolien's Reagent Test
B.
Esterification Test
C.
FeCl3 Test
D.
Ozonolysis Reaction
Ans:
FeCl3 Test
Explanation :
As phenol is an aromatic alcohol, so FeCl3 test is a test for alcohol and esterificaton test is also a test for alcohol. The ferric chloride test is used to determine the presence or absence of phenols in a given sample (for instance natural phenols in a plant extract).
Explanation :
The atomic radius is the distance from the atomic nucleus to the outermost stable electron orbital in an atom that is at equilibrium. It tends to decrease across a period from left to right. It usually increases while going down a group due to the addition of a new energy level (shell).
[4] The wire of flash bulbs is made up of –
A.
Mg
B.
Ba
C.
Cu
D.
Ag
Ans:
Mg
Explanation :
The wire of flash bulbs is made up of magnesium. Magnesium filaments are contained in bulbs fil led with oxygen gas, and electrically ignited by a contact in the camera shutter.
[5] Which of the following has the highest penetrating power?
A.
a-ray
B.
b-ray
C.
y-ray
D.
δ-ray
Ans:
y-ray
Explanation :
The penetrating power is inversely related to size. Alpha particles, being the largest, penetrate the least. Gamma rays are the most penetrating of the radiations. They are highly energetic waves and are poor at ionising other atoms or molecules.
[6] Radiations which is not emitted during radioactivity is –
A.
α rays
B.
β rays
C.
γ rays
D.
Cathode rays
Ans:
Cathode rays
Explanation :
Radioactivity is the process by which a nucleus of an unstable atom loses energy by emitting particles of ionizing radiation. It includes the emission of energetic alpha particles (α), beta particles (β), and gamma rays.
[7] Citric acid is present in free form in –
A.
Tamarind
B.
Milk
C.
Apple
D.
Lemon
Ans:
Lemon
Explanation :
Lemons, oranges, limes, and other citrus fruits naturally possess high concentrations of citric acid. The juice of the lemon is about 5% to 6% citric acid, which gives lemons a sow-taste. In fact, Citric acid was first isolated in 1784 by the chemist Carl Wilhelm Scheele, who crystallized it from lemon juice.
[8] Ultraviolet rays can be used in water treatment as –
A.
Flocculator
B.
Precipitator
C.
Hydrolyser
D.
Disinfectant
Ans:
Disinfectant
Explanation :
UV radiation can be an effective viricide and bactericide. Disinfection using UV radiation is commonly used in wastewater treatment applications and is finding an increased usage in drinking water treatment.
[9] The heaviest naturally occurring element is:
A.
Mercury
B.
Poloni
C.
Thorium
D.
Uranium
Ans:
Uranium
Explanation :
The heaviest element in terms of heaviest per a given number of atoms is the element with the highest atomic weight. This is the element with the larg st number of protons, which is presently element 118, Unanoctium. Ununoctium is the heaviest element, but it is man-made. The heaviest naturally-occurring element is uranium (atomic number 92, atomic weight 238.0289).
[10] Vinegar is used as a condiment, and in the pickling of vegetables and other foods. What is the constituent of vinegar?
A.
Butanoic acid
B.
Methanoic acid
C.
Ethanoic acid
D.
Hexanoic acid
Ans:
Ethanoic acid
Explanation :
When ethanol reacts with oxygen it forms a weak acid called ethanoic acid. In an open bottle of beer or wine, the reaction happens naturally in the presence of bacteria, and it is the ethanoic acid that can make beer or wine taste sour.
[11] Which of the following is used as a moderator in nuclear reactors?
A.
Thorium
B.
Graphite
C.
Ordinary water
D.
Radium
Ans:
Graphite
Explanation :
In nuclear reactors, a neutron moderator is a medium that regulates or reduces the speed of fast neutrons, turning them into thermal neutron moderator in many nuclear reactors.
[12] The inert gas which is substituted for nitrogen in the air used by deep sea divers for Breathing is:
A.
Neon
B.
Argon
C.
Krypton
D.
Helium
Ans:
Helium
Explanation :
Helium is used since it has very low (almost non-existent) narcotic properties. The nitrogen in air is highly narcotic at depth and adding helium allows one to dive without the effects of narcosis (where one's mind is impaired).
[13] Asbestos is formed of :
A.
Calcium and Magnesium
B.
Copper, Zinc and Manganese
C.
Lead and Iron
D.
Calcium and Zinc
Ans:
Calcium and Magnesium
Explanation :
Pure and simple, asbestos is a group of naturally occurring minerals. It is composed of calcium and magnesium silicate. Asbestos occurs as veins in rocks and is mined from the ground, similar to coal.
[14] Energy posses by a body in motion is called -
A.
Kinetic Energy
B.
Potential Energy
C.
Both of Above
D.
None of Above
Ans:
Kinetic Energy
Explanation :
Energy posses by a body in motion is called Kinetic Energy. In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
[15] Natural rubber is a polymer derived from?
A.
ethylene
B.
propylene
C.
isoprene
D.
butadiene
Ans:
isoprene
Explanation :
Natural rubber is an addition polymer that is obtained as a milky white fluid known as latex from a tropical rubber tree.
[16] The value of Avogadro Number is -
A.
6.023 x 1022
B.
6.023 x 1023
C.
6.023 x 1024
D.
6.023 x 1025
Ans:
6.023 x 1023
Explanation :
In chemistry and physics, the Avogadro constant is defined as the number of constituent particles (usually atoms or molecules) in one mole of a given substance. It has dimensions of reciprocal mol and its value is equal to.
[17] In silvery paints, the main constituent present is -
A.
Aluminium powder
B.
Silver powder
C.
Lead powder
D.
White lead
Ans:
Aluminium powder
Explanation :
In silvery paints, the main constituent is aluminium powder.
[18] Which one of the following is-a greenhouse gas?
A.
Nitrogen
B.
Helium
C.
Carbon dioxide
D.
Sulphur dioxide
Ans:
Carbon dioxide
Explanation :
Gases which absorb outgoing terrestrial rediation are called greenhouse gases, such as water vapour, methane, chloro-fluorocarbons, and carbon dioxide.
[19] The gas involved in Bhopal incident was -
A.
Hydrogen sulphide
B.
Nitrogen dioxide
C.
Methyl chloride
D.
Methyl isocyanide
Ans:
Methyl isocyanide
Explanation :
The Bhopal gas tragedy involved the leakage of poisonous methyl isocyanate (MIC) gas and other chemicals at the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh, on the night of 2–3 December 1984. It is considered the world’s worst industrial disaster.
[20] Alcohol prepared by the distillation of wood is:
A.
Propyl alcohol
B.
Methyl alcohol
C.
Ethyl alcohol
D.
Glycerolx
Ans:
Methyl alcohol
Explanation :
Alcohol prepared by the distillation of wood is Methyl alcohol. It is also called wood spirit.
[21] The metal that is used as a catalyst in the hydrogenation of oils is -
A.
Pb
B.
Ni
C.
Cu
D.
Pt
Ans:
Ni
Explanation :
Ni as catalyst binds both the H2 and the unsaturated substrate and facilitates their union which is the mechanism of hydrogenation of oil while other given element can't able to do so. Ni is used for most reaction as the catalyst because of it is cheaper to run the reaction with it, in commercial world cost- effectiveness is best and desired pathway.
[22] The particle required to continue the chain process of Uranium fission is –
A.
Electron
B.
Proton
C.
Neutron
D.
Positron
Ans:
Neutron
Explanation :
Fission as encountered in the modern world is usually a deliberately produced man-made nuclear reaction induced by a neutron. The nuclear fuels undergo fission when struck by fission neutrons, and in turn emit neutrons when they break apart. This makes possible a self-sustaining nuclear chain reaction that releases energy at a controlled rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.
[23] Which of the following is used to increase the anti-knocking property of petrol?
A.
Tetramethyl lead
B.
Tetraethyl lead
C.
nimethyl lead
D.
Triethyl lead
Ans:
Tetraethyl lead
Explanation :
An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel's octane rating by raising the temperature and pressure at which ignition occurs. Tetraethyllead was admixed with gasoline (petrol) beginning in the 1920s as an inexpensive octane booster which allowed engine compression to be raised substantially, which in turn increased vehicle performance and fuel economy.
[24] Chemical name of bleaching powder is –
A.
Calcium chlorate
B.
Calcium hypochlorite
C.
Calcium chloro hypochlorite
D.
Calcium bi chloride
Ans:
Calcium hypochlorite
Explanation :
Calcium hypochlorite is a chemical compound with formula Ca(ClO)2. It is widely used for water treatment and as a bleaching agent. This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochlorite.
[25] Alcoholic OH) group can be identified by :
A.
Tolien's Reagent Test
B.
Esterification Test
C.
FeCl3 Test
D.
Ozonolysis Reaction
Ans:
FeCl3 Test
Explanation :
As phenol is an aromatic alcohol, so FeCl3 test is a test for alcohol and esterificaton test is also a test for alcohol. The ferric chloride test is used to determine the presence or absence of phenols in a given sample (for instance natural phenols in a plant extract).
Explanation :
The penetrating power is inversely related to size. Alpha particles, being the largest, penetrate the least. Gamma rays are the most penetrating of the radiations. They are highly energetic waves and are poor at ionising other atoms or molecules.
[6] Radiations which is not emitted during radioactivity is –
A.
α rays
B.
β rays
C.
γ rays
D.
Cathode rays
Ans:
Cathode rays
Explanation :
Radioactivity is the process by which a nucleus of an unstable atom loses energy by emitting particles of ionizing radiation. It includes the emission of energetic alpha particles (α), beta particles (β), and gamma rays.
[7] Citric acid is present in free form in –
A.
Tamarind
B.
Milk
C.
Apple
D.
Lemon
Ans:
Lemon
Explanation :
Lemons, oranges, limes, and other citrus fruits naturally possess high concentrations of citric acid. The juice of the lemon is about 5% to 6% citric acid, which gives lemons a sow-taste. In fact, Citric acid was first isolated in 1784 by the chemist Carl Wilhelm Scheele, who crystallized it from lemon juice.
[8] Ultraviolet rays can be used in water treatment as –
A.
Flocculator
B.
Precipitator
C.
Hydrolyser
D.
Disinfectant
Ans:
Disinfectant
Explanation :
UV radiation can be an effective viricide and bactericide. Disinfection using UV radiation is commonly used in wastewater treatment applications and is finding an increased usage in drinking water treatment.
[9] The heaviest naturally occurring element is:
A.
Mercury
B.
Poloni
C.
Thorium
D.
Uranium
Ans:
Uranium
Explanation :
The heaviest element in terms of heaviest per a given number of atoms is the element with the highest atomic weight. This is the element with the larg st number of protons, which is presently element 118, Unanoctium. Ununoctium is the heaviest element, but it is man-made. The heaviest naturally-occurring element is uranium (atomic number 92, atomic weight 238.0289).
[10] Vinegar is used as a condiment, and in the pickling of vegetables and other foods. What is the constituent of vinegar?
A.
Butanoic acid
B.
Methanoic acid
C.
Ethanoic acid
D.
Hexanoic acid
Ans:
Ethanoic acid
Explanation :
When ethanol reacts with oxygen it forms a weak acid called ethanoic acid. In an open bottle of beer or wine, the reaction happens naturally in the presence of bacteria, and it is the ethanoic acid that can make beer or wine taste sour.
[11] Which of the following is used as a moderator in nuclear reactors?
A.
Thorium
B.
Graphite
C.
Ordinary water
D.
Radium
Ans:
Graphite
Explanation :
In nuclear reactors, a neutron moderator is a medium that regulates or reduces the speed of fast neutrons, turning them into thermal neutron moderator in many nuclear reactors.
[12] The inert gas which is substituted for nitrogen in the air used by deep sea divers for Breathing is:
A.
Neon
B.
Argon
C.
Krypton
D.
Helium
Ans:
Helium
Explanation :
Helium is used since it has very low (almost non-existent) narcotic properties. The nitrogen in air is highly narcotic at depth and adding helium allows one to dive without the effects of narcosis (where one's mind is impaired).
[13] Asbestos is formed of :
A.
Calcium and Magnesium
B.
Copper, Zinc and Manganese
C.
Lead and Iron
D.
Calcium and Zinc
Ans:
Calcium and Magnesium
Explanation :
Pure and simple, asbestos is a group of naturally occurring minerals. It is composed of calcium and magnesium silicate. Asbestos occurs as veins in rocks and is mined from the ground, similar to coal.
[14] Energy posses by a body in motion is called -
A.
Kinetic Energy
B.
Potential Energy
C.
Both of Above
D.
None of Above
Ans:
Kinetic Energy
Explanation :
Energy posses by a body in motion is called Kinetic Energy. In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
[15] Natural rubber is a polymer derived from?
A.
ethylene
B.
propylene
C.
isoprene
D.
butadiene
Ans:
isoprene
Explanation :
Natural rubber is an addition polymer that is obtained as a milky white fluid known as latex from a tropical rubber tree.
[16] The value of Avogadro Number is -
A.
6.023 x 1022
B.
6.023 x 1023
C.
6.023 x 1024
D.
6.023 x 1025
Ans:
6.023 x 1023
Explanation :
In chemistry and physics, the Avogadro constant is defined as the number of constituent particles (usually atoms or molecules) in one mole of a given substance. It has dimensions of reciprocal mol and its value is equal to.
[17] In silvery paints, the main constituent present is -
A.
Aluminium powder
B.
Silver powder
C.
Lead powder
D.
White lead
Ans:
Aluminium powder
Explanation :
In silvery paints, the main constituent is aluminium powder.
[18] Which one of the following is-a greenhouse gas?
A.
Nitrogen
B.
Helium
C.
Carbon dioxide
D.
Sulphur dioxide
Ans:
Carbon dioxide
Explanation :
Gases which absorb outgoing terrestrial rediation are called greenhouse gases, such as water vapour, methane, chloro-fluorocarbons, and carbon dioxide.
[19] The gas involved in Bhopal incident was -
A.
Hydrogen sulphide
B.
Nitrogen dioxide
C.
Methyl chloride
D.
Methyl isocyanide
Ans:
Methyl isocyanide
Explanation :
The Bhopal gas tragedy involved the leakage of poisonous methyl isocyanate (MIC) gas and other chemicals at the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh, on the night of 2–3 December 1984. It is considered the world’s worst industrial disaster.
[20] Alcohol prepared by the distillation of wood is:
A.
Propyl alcohol
B.
Methyl alcohol
C.
Ethyl alcohol
D.
Glycerolx
Ans:
Methyl alcohol
Explanation :
Alcohol prepared by the distillation of wood is Methyl alcohol. It is also called wood spirit.
[21] The metal that is used as a catalyst in the hydrogenation of oils is -
A.
Pb
B.
Ni
C.
Cu
D.
Pt
Ans:
Ni
Explanation :
Ni as catalyst binds both the H2 and the unsaturated substrate and facilitates their union which is the mechanism of hydrogenation of oil while other given element can't able to do so. Ni is used for most reaction as the catalyst because of it is cheaper to run the reaction with it, in commercial world cost- effectiveness is best and desired pathway.
[22] The particle required to continue the chain process of Uranium fission is –
A.
Electron
B.
Proton
C.
Neutron
D.
Positron
Ans:
Neutron
Explanation :
Fission as encountered in the modern world is usually a deliberately produced man-made nuclear reaction induced by a neutron. The nuclear fuels undergo fission when struck by fission neutrons, and in turn emit neutrons when they break apart. This makes possible a self-sustaining nuclear chain reaction that releases energy at a controlled rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.
[23] Which of the following is used to increase the anti-knocking property of petrol?
A.
Tetramethyl lead
B.
Tetraethyl lead
C.
nimethyl lead
D.
Triethyl lead
Ans:
Tetraethyl lead
Explanation :
An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel's octane rating by raising the temperature and pressure at which ignition occurs. Tetraethyllead was admixed with gasoline (petrol) beginning in the 1920s as an inexpensive octane booster which allowed engine compression to be raised substantially, which in turn increased vehicle performance and fuel economy.
[24] Chemical name of bleaching powder is –
A.
Calcium chlorate
B.
Calcium hypochlorite
C.
Calcium chloro hypochlorite
D.
Calcium bi chloride
Ans:
Calcium hypochlorite
Explanation :
Calcium hypochlorite is a chemical compound with formula Ca(ClO)2. It is widely used for water treatment and as a bleaching agent. This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochlorite.
[25] Alcoholic OH) group can be identified by :
A.
Tolien's Reagent Test
B.
Esterification Test
C.
FeCl3 Test
D.
Ozonolysis Reaction
Ans:
FeCl3 Test
Explanation :
As phenol is an aromatic alcohol, so FeCl3 test is a test for alcohol and esterificaton test is also a test for alcohol. The ferric chloride test is used to determine the presence or absence of phenols in a given sample (for instance natural phenols in a plant extract).
Explanation :
Lemons, oranges, limes, and other citrus fruits naturally possess high concentrations of citric acid. The juice of the lemon is about 5% to 6% citric acid, which gives lemons a sow-taste. In fact, Citric acid was first isolated in 1784 by the chemist Carl Wilhelm Scheele, who crystallized it from lemon juice.
[8] Ultraviolet rays can be used in water treatment as –
A.
Flocculator
B.
Precipitator
C.
Hydrolyser
D.
Disinfectant
Ans:
Disinfectant
Explanation :
UV radiation can be an effective viricide and bactericide. Disinfection using UV radiation is commonly used in wastewater treatment applications and is finding an increased usage in drinking water treatment.
[9] The heaviest naturally occurring element is:
A.
Mercury
B.
Poloni
C.
Thorium
D.
Uranium
Ans:
Uranium
Explanation :
The heaviest element in terms of heaviest per a given number of atoms is the element with the highest atomic weight. This is the element with the larg st number of protons, which is presently element 118, Unanoctium. Ununoctium is the heaviest element, but it is man-made. The heaviest naturally-occurring element is uranium (atomic number 92, atomic weight 238.0289).
[10] Vinegar is used as a condiment, and in the pickling of vegetables and other foods. What is the constituent of vinegar?
A.
Butanoic acid
B.
Methanoic acid
C.
Ethanoic acid
D.
Hexanoic acid
Ans:
Ethanoic acid
Explanation :
When ethanol reacts with oxygen it forms a weak acid called ethanoic acid. In an open bottle of beer or wine, the reaction happens naturally in the presence of bacteria, and it is the ethanoic acid that can make beer or wine taste sour.
[11] Which of the following is used as a moderator in nuclear reactors?
A.
Thorium
B.
Graphite
C.
Ordinary water
D.
Radium
Ans:
Graphite
Explanation :
In nuclear reactors, a neutron moderator is a medium that regulates or reduces the speed of fast neutrons, turning them into thermal neutron moderator in many nuclear reactors.
[12] The inert gas which is substituted for nitrogen in the air used by deep sea divers for Breathing is:
A.
Neon
B.
Argon
C.
Krypton
D.
Helium
Ans:
Helium
Explanation :
Helium is used since it has very low (almost non-existent) narcotic properties. The nitrogen in air is highly narcotic at depth and adding helium allows one to dive without the effects of narcosis (where one's mind is impaired).
[13] Asbestos is formed of :
A.
Calcium and Magnesium
B.
Copper, Zinc and Manganese
C.
Lead and Iron
D.
Calcium and Zinc
Ans:
Calcium and Magnesium
Explanation :
Pure and simple, asbestos is a group of naturally occurring minerals. It is composed of calcium and magnesium silicate. Asbestos occurs as veins in rocks and is mined from the ground, similar to coal.
[14] Energy posses by a body in motion is called -
A.
Kinetic Energy
B.
Potential Energy
C.
Both of Above
D.
None of Above
Ans:
Kinetic Energy
Explanation :
Energy posses by a body in motion is called Kinetic Energy. In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
[15] Natural rubber is a polymer derived from?
A.
ethylene
B.
propylene
C.
isoprene
D.
butadiene
Ans:
isoprene
Explanation :
Natural rubber is an addition polymer that is obtained as a milky white fluid known as latex from a tropical rubber tree.
[16] The value of Avogadro Number is -
A.
6.023 x 1022
B.
6.023 x 1023
C.
6.023 x 1024
D.
6.023 x 1025
Ans:
6.023 x 1023
Explanation :
In chemistry and physics, the Avogadro constant is defined as the number of constituent particles (usually atoms or molecules) in one mole of a given substance. It has dimensions of reciprocal mol and its value is equal to.
[17] In silvery paints, the main constituent present is -
A.
Aluminium powder
B.
Silver powder
C.
Lead powder
D.
White lead
Ans:
Aluminium powder
Explanation :
In silvery paints, the main constituent is aluminium powder.
[18] Which one of the following is-a greenhouse gas?
A.
Nitrogen
B.
Helium
C.
Carbon dioxide
D.
Sulphur dioxide
Ans:
Carbon dioxide
Explanation :
Gases which absorb outgoing terrestrial rediation are called greenhouse gases, such as water vapour, methane, chloro-fluorocarbons, and carbon dioxide.
[19] The gas involved in Bhopal incident was -
A.
Hydrogen sulphide
B.
Nitrogen dioxide
C.
Methyl chloride
D.
Methyl isocyanide
Ans:
Methyl isocyanide
Explanation :
The Bhopal gas tragedy involved the leakage of poisonous methyl isocyanate (MIC) gas and other chemicals at the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh, on the night of 2–3 December 1984. It is considered the world’s worst industrial disaster.
[20] Alcohol prepared by the distillation of wood is:
A.
Propyl alcohol
B.
Methyl alcohol
C.
Ethyl alcohol
D.
Glycerolx
Ans:
Methyl alcohol
Explanation :
Alcohol prepared by the distillation of wood is Methyl alcohol. It is also called wood spirit.
[21] The metal that is used as a catalyst in the hydrogenation of oils is -
A.
Pb
B.
Ni
C.
Cu
D.
Pt
Ans:
Ni
Explanation :
Ni as catalyst binds both the H2 and the unsaturated substrate and facilitates their union which is the mechanism of hydrogenation of oil while other given element can't able to do so. Ni is used for most reaction as the catalyst because of it is cheaper to run the reaction with it, in commercial world cost- effectiveness is best and desired pathway.
[22] The particle required to continue the chain process of Uranium fission is –
A.
Electron
B.
Proton
C.
Neutron
D.
Positron
Ans:
Neutron
Explanation :
Fission as encountered in the modern world is usually a deliberately produced man-made nuclear reaction induced by a neutron. The nuclear fuels undergo fission when struck by fission neutrons, and in turn emit neutrons when they break apart. This makes possible a self-sustaining nuclear chain reaction that releases energy at a controlled rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.
[23] Which of the following is used to increase the anti-knocking property of petrol?
A.
Tetramethyl lead
B.
Tetraethyl lead
C.
nimethyl lead
D.
Triethyl lead
Ans:
Tetraethyl lead
Explanation :
An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel's octane rating by raising the temperature and pressure at which ignition occurs. Tetraethyllead was admixed with gasoline (petrol) beginning in the 1920s as an inexpensive octane booster which allowed engine compression to be raised substantially, which in turn increased vehicle performance and fuel economy.
[24] Chemical name of bleaching powder is –
A.
Calcium chlorate
B.
Calcium hypochlorite
C.
Calcium chloro hypochlorite
D.
Calcium bi chloride
Ans:
Calcium hypochlorite
Explanation :
Calcium hypochlorite is a chemical compound with formula Ca(ClO)2. It is widely used for water treatment and as a bleaching agent. This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochlorite.
[25] Alcoholic OH) group can be identified by :
A.
Tolien's Reagent Test
B.
Esterification Test
C.
FeCl3 Test
D.
Ozonolysis Reaction
Ans:
FeCl3 Test
Explanation :
As phenol is an aromatic alcohol, so FeCl3 test is a test for alcohol and esterificaton test is also a test for alcohol. The ferric chloride test is used to determine the presence or absence of phenols in a given sample (for instance natural phenols in a plant extract).
Explanation :
The heaviest element in terms of heaviest per a given number of atoms is the element with the highest atomic weight. This is the element with the larg st number of protons, which is presently element 118, Unanoctium. Ununoctium is the heaviest element, but it is man-made. The heaviest naturally-occurring element is uranium (atomic number 92, atomic weight 238.0289).
[10] Vinegar is used as a condiment, and in the pickling of vegetables and other foods. What is the constituent of vinegar?
A.
Butanoic acid
B.
Methanoic acid
C.
Ethanoic acid
D.
Hexanoic acid
Ans:
Ethanoic acid
Explanation :
When ethanol reacts with oxygen it forms a weak acid called ethanoic acid. In an open bottle of beer or wine, the reaction happens naturally in the presence of bacteria, and it is the ethanoic acid that can make beer or wine taste sour.
[11] Which of the following is used as a moderator in nuclear reactors?
A.
Thorium
B.
Graphite
C.
Ordinary water
D.
Radium
Ans:
Graphite
Explanation :
In nuclear reactors, a neutron moderator is a medium that regulates or reduces the speed of fast neutrons, turning them into thermal neutron moderator in many nuclear reactors.
[12] The inert gas which is substituted for nitrogen in the air used by deep sea divers for Breathing is:
A.
Neon
B.
Argon
C.
Krypton
D.
Helium
Ans:
Helium
Explanation :
Helium is used since it has very low (almost non-existent) narcotic properties. The nitrogen in air is highly narcotic at depth and adding helium allows one to dive without the effects of narcosis (where one's mind is impaired).
[13] Asbestos is formed of :
A.
Calcium and Magnesium
B.
Copper, Zinc and Manganese
C.
Lead and Iron
D.
Calcium and Zinc
Ans:
Calcium and Magnesium
Explanation :
Pure and simple, asbestos is a group of naturally occurring minerals. It is composed of calcium and magnesium silicate. Asbestos occurs as veins in rocks and is mined from the ground, similar to coal.
[14] Energy posses by a body in motion is called -
A.
Kinetic Energy
B.
Potential Energy
C.
Both of Above
D.
None of Above
Ans:
Kinetic Energy
Explanation :
Energy posses by a body in motion is called Kinetic Energy. In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
[15] Natural rubber is a polymer derived from?
A.
ethylene
B.
propylene
C.
isoprene
D.
butadiene
Ans:
isoprene
Explanation :
Natural rubber is an addition polymer that is obtained as a milky white fluid known as latex from a tropical rubber tree.
[16] The value of Avogadro Number is -
A.
6.023 x 1022
B.
6.023 x 1023
C.
6.023 x 1024
D.
6.023 x 1025
Ans:
6.023 x 1023
Explanation :
In chemistry and physics, the Avogadro constant is defined as the number of constituent particles (usually atoms or molecules) in one mole of a given substance. It has dimensions of reciprocal mol and its value is equal to.
[17] In silvery paints, the main constituent present is -
A.
Aluminium powder
B.
Silver powder
C.
Lead powder
D.
White lead
Ans:
Aluminium powder
Explanation :
In silvery paints, the main constituent is aluminium powder.
[18] Which one of the following is-a greenhouse gas?
A.
Nitrogen
B.
Helium
C.
Carbon dioxide
D.
Sulphur dioxide
Ans:
Carbon dioxide
Explanation :
Gases which absorb outgoing terrestrial rediation are called greenhouse gases, such as water vapour, methane, chloro-fluorocarbons, and carbon dioxide.
[19] The gas involved in Bhopal incident was -
A.
Hydrogen sulphide
B.
Nitrogen dioxide
C.
Methyl chloride
D.
Methyl isocyanide
Ans:
Methyl isocyanide
Explanation :
The Bhopal gas tragedy involved the leakage of poisonous methyl isocyanate (MIC) gas and other chemicals at the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh, on the night of 2–3 December 1984. It is considered the world’s worst industrial disaster.
[20] Alcohol prepared by the distillation of wood is:
A.
Propyl alcohol
B.
Methyl alcohol
C.
Ethyl alcohol
D.
Glycerolx
Ans:
Methyl alcohol
Explanation :
Alcohol prepared by the distillation of wood is Methyl alcohol. It is also called wood spirit.
[21] The metal that is used as a catalyst in the hydrogenation of oils is -
A.
Pb
B.
Ni
C.
Cu
D.
Pt
Ans:
Ni
Explanation :
Ni as catalyst binds both the H2 and the unsaturated substrate and facilitates their union which is the mechanism of hydrogenation of oil while other given element can't able to do so. Ni is used for most reaction as the catalyst because of it is cheaper to run the reaction with it, in commercial world cost- effectiveness is best and desired pathway.
[22] The particle required to continue the chain process of Uranium fission is –
A.
Electron
B.
Proton
C.
Neutron
D.
Positron
Ans:
Neutron
Explanation :
Fission as encountered in the modern world is usually a deliberately produced man-made nuclear reaction induced by a neutron. The nuclear fuels undergo fission when struck by fission neutrons, and in turn emit neutrons when they break apart. This makes possible a self-sustaining nuclear chain reaction that releases energy at a controlled rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.
[23] Which of the following is used to increase the anti-knocking property of petrol?
A.
Tetramethyl lead
B.
Tetraethyl lead
C.
nimethyl lead
D.
Triethyl lead
Ans:
Tetraethyl lead
Explanation :
An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel's octane rating by raising the temperature and pressure at which ignition occurs. Tetraethyllead was admixed with gasoline (petrol) beginning in the 1920s as an inexpensive octane booster which allowed engine compression to be raised substantially, which in turn increased vehicle performance and fuel economy.
[24] Chemical name of bleaching powder is –
A.
Calcium chlorate
B.
Calcium hypochlorite
C.
Calcium chloro hypochlorite
D.
Calcium bi chloride
Ans:
Calcium hypochlorite
Explanation :
Calcium hypochlorite is a chemical compound with formula Ca(ClO)2. It is widely used for water treatment and as a bleaching agent. This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochlorite.
[25] Alcoholic OH) group can be identified by :
A.
Tolien's Reagent Test
B.
Esterification Test
C.
FeCl3 Test
D.
Ozonolysis Reaction
Ans:
FeCl3 Test
Explanation :
As phenol is an aromatic alcohol, so FeCl3 test is a test for alcohol and esterificaton test is also a test for alcohol. The ferric chloride test is used to determine the presence or absence of phenols in a given sample (for instance natural phenols in a plant extract).
Explanation :
In nuclear reactors, a neutron moderator is a medium that regulates or reduces the speed of fast neutrons, turning them into thermal neutron moderator in many nuclear reactors.
[12] The inert gas which is substituted for nitrogen in the air used by deep sea divers for Breathing is:
A.
Neon
B.
Argon
C.
Krypton
D.
Helium
Ans:
Helium
Explanation :
Helium is used since it has very low (almost non-existent) narcotic properties. The nitrogen in air is highly narcotic at depth and adding helium allows one to dive without the effects of narcosis (where one's mind is impaired).
[13] Asbestos is formed of :
A.
Calcium and Magnesium
B.
Copper, Zinc and Manganese
C.
Lead and Iron
D.
Calcium and Zinc
Ans:
Calcium and Magnesium
Explanation :
Pure and simple, asbestos is a group of naturally occurring minerals. It is composed of calcium and magnesium silicate. Asbestos occurs as veins in rocks and is mined from the ground, similar to coal.
[14] Energy posses by a body in motion is called -
A.
Kinetic Energy
B.
Potential Energy
C.
Both of Above
D.
None of Above
Ans:
Kinetic Energy
Explanation :
Energy posses by a body in motion is called Kinetic Energy. In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
[15] Natural rubber is a polymer derived from?
A.
ethylene
B.
propylene
C.
isoprene
D.
butadiene
Ans:
isoprene
Explanation :
Natural rubber is an addition polymer that is obtained as a milky white fluid known as latex from a tropical rubber tree.
[16] The value of Avogadro Number is -
A.
6.023 x 1022
B.
6.023 x 1023
C.
6.023 x 1024
D.
6.023 x 1025
Ans:
6.023 x 1023
Explanation :
In chemistry and physics, the Avogadro constant is defined as the number of constituent particles (usually atoms or molecules) in one mole of a given substance. It has dimensions of reciprocal mol and its value is equal to.
[17] In silvery paints, the main constituent present is -
A.
Aluminium powder
B.
Silver powder
C.
Lead powder
D.
White lead
Ans:
Aluminium powder
Explanation :
In silvery paints, the main constituent is aluminium powder.
[18] Which one of the following is-a greenhouse gas?
A.
Nitrogen
B.
Helium
C.
Carbon dioxide
D.
Sulphur dioxide
Ans:
Carbon dioxide
Explanation :
Gases which absorb outgoing terrestrial rediation are called greenhouse gases, such as water vapour, methane, chloro-fluorocarbons, and carbon dioxide.
[19] The gas involved in Bhopal incident was -
A.
Hydrogen sulphide
B.
Nitrogen dioxide
C.
Methyl chloride
D.
Methyl isocyanide
Ans:
Methyl isocyanide
Explanation :
The Bhopal gas tragedy involved the leakage of poisonous methyl isocyanate (MIC) gas and other chemicals at the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh, on the night of 2–3 December 1984. It is considered the world’s worst industrial disaster.
[20] Alcohol prepared by the distillation of wood is:
A.
Propyl alcohol
B.
Methyl alcohol
C.
Ethyl alcohol
D.
Glycerolx
Ans:
Methyl alcohol
Explanation :
Alcohol prepared by the distillation of wood is Methyl alcohol. It is also called wood spirit.
[21] The metal that is used as a catalyst in the hydrogenation of oils is -
A.
Pb
B.
Ni
C.
Cu
D.
Pt
Ans:
Ni
Explanation :
Ni as catalyst binds both the H2 and the unsaturated substrate and facilitates their union which is the mechanism of hydrogenation of oil while other given element can't able to do so. Ni is used for most reaction as the catalyst because of it is cheaper to run the reaction with it, in commercial world cost- effectiveness is best and desired pathway.
[22] The particle required to continue the chain process of Uranium fission is –
A.
Electron
B.
Proton
C.
Neutron
D.
Positron
Ans:
Neutron
Explanation :
Fission as encountered in the modern world is usually a deliberately produced man-made nuclear reaction induced by a neutron. The nuclear fuels undergo fission when struck by fission neutrons, and in turn emit neutrons when they break apart. This makes possible a self-sustaining nuclear chain reaction that releases energy at a controlled rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.
[23] Which of the following is used to increase the anti-knocking property of petrol?
A.
Tetramethyl lead
B.
Tetraethyl lead
C.
nimethyl lead
D.
Triethyl lead
Ans:
Tetraethyl lead
Explanation :
An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel's octane rating by raising the temperature and pressure at which ignition occurs. Tetraethyllead was admixed with gasoline (petrol) beginning in the 1920s as an inexpensive octane booster which allowed engine compression to be raised substantially, which in turn increased vehicle performance and fuel economy.
[24] Chemical name of bleaching powder is –
A.
Calcium chlorate
B.
Calcium hypochlorite
C.
Calcium chloro hypochlorite
D.
Calcium bi chloride
Ans:
Calcium hypochlorite
Explanation :
Calcium hypochlorite is a chemical compound with formula Ca(ClO)2. It is widely used for water treatment and as a bleaching agent. This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochlorite.
[25] Alcoholic OH) group can be identified by :
A.
Tolien's Reagent Test
B.
Esterification Test
C.
FeCl3 Test
D.
Ozonolysis Reaction
Ans:
FeCl3 Test
Explanation :
As phenol is an aromatic alcohol, so FeCl3 test is a test for alcohol and esterificaton test is also a test for alcohol. The ferric chloride test is used to determine the presence or absence of phenols in a given sample (for instance natural phenols in a plant extract).
Explanation :
Pure and simple, asbestos is a group of naturally occurring minerals. It is composed of calcium and magnesium silicate. Asbestos occurs as veins in rocks and is mined from the ground, similar to coal.
[14] Energy posses by a body in motion is called -
A.
Kinetic Energy
B.
Potential Energy
C.
Both of Above
D.
None of Above
Ans:
Kinetic Energy
Explanation :
Energy posses by a body in motion is called Kinetic Energy. In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
[15] Natural rubber is a polymer derived from?
A.
ethylene
B.
propylene
C.
isoprene
D.
butadiene
Ans:
isoprene
Explanation :
Natural rubber is an addition polymer that is obtained as a milky white fluid known as latex from a tropical rubber tree.
[16] The value of Avogadro Number is -
A.
6.023 x 1022
B.
6.023 x 1023
C.
6.023 x 1024
D.
6.023 x 1025
Ans:
6.023 x 1023
Explanation :
In chemistry and physics, the Avogadro constant is defined as the number of constituent particles (usually atoms or molecules) in one mole of a given substance. It has dimensions of reciprocal mol and its value is equal to.
[17] In silvery paints, the main constituent present is -
A.
Aluminium powder
B.
Silver powder
C.
Lead powder
D.
White lead
Ans:
Aluminium powder
Explanation :
In silvery paints, the main constituent is aluminium powder.
[18] Which one of the following is-a greenhouse gas?
A.
Nitrogen
B.
Helium
C.
Carbon dioxide
D.
Sulphur dioxide
Ans:
Carbon dioxide
Explanation :
Gases which absorb outgoing terrestrial rediation are called greenhouse gases, such as water vapour, methane, chloro-fluorocarbons, and carbon dioxide.
[19] The gas involved in Bhopal incident was -
A.
Hydrogen sulphide
B.
Nitrogen dioxide
C.
Methyl chloride
D.
Methyl isocyanide
Ans:
Methyl isocyanide
Explanation :
The Bhopal gas tragedy involved the leakage of poisonous methyl isocyanate (MIC) gas and other chemicals at the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh, on the night of 2–3 December 1984. It is considered the world’s worst industrial disaster.
[20] Alcohol prepared by the distillation of wood is:
A.
Propyl alcohol
B.
Methyl alcohol
C.
Ethyl alcohol
D.
Glycerolx
Ans:
Methyl alcohol
Explanation :
Alcohol prepared by the distillation of wood is Methyl alcohol. It is also called wood spirit.
[21] The metal that is used as a catalyst in the hydrogenation of oils is -
A.
Pb
B.
Ni
C.
Cu
D.
Pt
Ans:
Ni
Explanation :
Ni as catalyst binds both the H2 and the unsaturated substrate and facilitates their union which is the mechanism of hydrogenation of oil while other given element can't able to do so. Ni is used for most reaction as the catalyst because of it is cheaper to run the reaction with it, in commercial world cost- effectiveness is best and desired pathway.
[22] The particle required to continue the chain process of Uranium fission is –
A.
Electron
B.
Proton
C.
Neutron
D.
Positron
Ans:
Neutron
Explanation :
Fission as encountered in the modern world is usually a deliberately produced man-made nuclear reaction induced by a neutron. The nuclear fuels undergo fission when struck by fission neutrons, and in turn emit neutrons when they break apart. This makes possible a self-sustaining nuclear chain reaction that releases energy at a controlled rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.
[23] Which of the following is used to increase the anti-knocking property of petrol?
A.
Tetramethyl lead
B.
Tetraethyl lead
C.
nimethyl lead
D.
Triethyl lead
Ans:
Tetraethyl lead
Explanation :
An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel's octane rating by raising the temperature and pressure at which ignition occurs. Tetraethyllead was admixed with gasoline (petrol) beginning in the 1920s as an inexpensive octane booster which allowed engine compression to be raised substantially, which in turn increased vehicle performance and fuel economy.
[24] Chemical name of bleaching powder is –
A.
Calcium chlorate
B.
Calcium hypochlorite
C.
Calcium chloro hypochlorite
D.
Calcium bi chloride
Ans:
Calcium hypochlorite
Explanation :
Calcium hypochlorite is a chemical compound with formula Ca(ClO)2. It is widely used for water treatment and as a bleaching agent. This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochlorite.
[25] Alcoholic OH) group can be identified by :
A.
Tolien's Reagent Test
B.
Esterification Test
C.
FeCl3 Test
D.
Ozonolysis Reaction
Ans:
FeCl3 Test
Explanation :
As phenol is an aromatic alcohol, so FeCl3 test is a test for alcohol and esterificaton test is also a test for alcohol. The ferric chloride test is used to determine the presence or absence of phenols in a given sample (for instance natural phenols in a plant extract).
Explanation :
Natural rubber is an addition polymer that is obtained as a milky white fluid known as latex from a tropical rubber tree.
[16] The value of Avogadro Number is -
A.
6.023 x 1022
B.
6.023 x 1023
C.
6.023 x 1024
D.
6.023 x 1025
Ans:
6.023 x 1023
Explanation :
In chemistry and physics, the Avogadro constant is defined as the number of constituent particles (usually atoms or molecules) in one mole of a given substance. It has dimensions of reciprocal mol and its value is equal to.
[17] In silvery paints, the main constituent present is -
A.
Aluminium powder
B.
Silver powder
C.
Lead powder
D.
White lead
Ans:
Aluminium powder
Explanation :
In silvery paints, the main constituent is aluminium powder.
[18] Which one of the following is-a greenhouse gas?
A.
Nitrogen
B.
Helium
C.
Carbon dioxide
D.
Sulphur dioxide
Ans:
Carbon dioxide
Explanation :
Gases which absorb outgoing terrestrial rediation are called greenhouse gases, such as water vapour, methane, chloro-fluorocarbons, and carbon dioxide.
[19] The gas involved in Bhopal incident was -
A.
Hydrogen sulphide
B.
Nitrogen dioxide
C.
Methyl chloride
D.
Methyl isocyanide
Ans:
Methyl isocyanide
Explanation :
The Bhopal gas tragedy involved the leakage of poisonous methyl isocyanate (MIC) gas and other chemicals at the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh, on the night of 2–3 December 1984. It is considered the world’s worst industrial disaster.
[20] Alcohol prepared by the distillation of wood is:
A.
Propyl alcohol
B.
Methyl alcohol
C.
Ethyl alcohol
D.
Glycerolx
Ans:
Methyl alcohol
Explanation :
Alcohol prepared by the distillation of wood is Methyl alcohol. It is also called wood spirit.
[21] The metal that is used as a catalyst in the hydrogenation of oils is -
A.
Pb
B.
Ni
C.
Cu
D.
Pt
Ans:
Ni
Explanation :
Ni as catalyst binds both the H2 and the unsaturated substrate and facilitates their union which is the mechanism of hydrogenation of oil while other given element can't able to do so. Ni is used for most reaction as the catalyst because of it is cheaper to run the reaction with it, in commercial world cost- effectiveness is best and desired pathway.
[22] The particle required to continue the chain process of Uranium fission is –
A.
Electron
B.
Proton
C.
Neutron
D.
Positron
Ans:
Neutron
Explanation :
Fission as encountered in the modern world is usually a deliberately produced man-made nuclear reaction induced by a neutron. The nuclear fuels undergo fission when struck by fission neutrons, and in turn emit neutrons when they break apart. This makes possible a self-sustaining nuclear chain reaction that releases energy at a controlled rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.
[23] Which of the following is used to increase the anti-knocking property of petrol?
A.
Tetramethyl lead
B.
Tetraethyl lead
C.
nimethyl lead
D.
Triethyl lead
Ans:
Tetraethyl lead
Explanation :
An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel's octane rating by raising the temperature and pressure at which ignition occurs. Tetraethyllead was admixed with gasoline (petrol) beginning in the 1920s as an inexpensive octane booster which allowed engine compression to be raised substantially, which in turn increased vehicle performance and fuel economy.
[24] Chemical name of bleaching powder is –
A.
Calcium chlorate
B.
Calcium hypochlorite
C.
Calcium chloro hypochlorite
D.
Calcium bi chloride
Ans:
Calcium hypochlorite
Explanation :
Calcium hypochlorite is a chemical compound with formula Ca(ClO)2. It is widely used for water treatment and as a bleaching agent. This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochlorite.
[25] Alcoholic OH) group can be identified by :
A.
Tolien's Reagent Test
B.
Esterification Test
C.
FeCl3 Test
D.
Ozonolysis Reaction
Ans:
FeCl3 Test
Explanation :
As phenol is an aromatic alcohol, so FeCl3 test is a test for alcohol and esterificaton test is also a test for alcohol. The ferric chloride test is used to determine the presence or absence of phenols in a given sample (for instance natural phenols in a plant extract).
Explanation :
In silvery paints, the main constituent is aluminium powder.
[18] Which one of the following is-a greenhouse gas?
A.
Nitrogen
B.
Helium
C.
Carbon dioxide
D.
Sulphur dioxide
Ans:
Carbon dioxide
Explanation :
Gases which absorb outgoing terrestrial rediation are called greenhouse gases, such as water vapour, methane, chloro-fluorocarbons, and carbon dioxide.
[19] The gas involved in Bhopal incident was -
A.
Hydrogen sulphide
B.
Nitrogen dioxide
C.
Methyl chloride
D.
Methyl isocyanide
Ans:
Methyl isocyanide
Explanation :
The Bhopal gas tragedy involved the leakage of poisonous methyl isocyanate (MIC) gas and other chemicals at the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh, on the night of 2–3 December 1984. It is considered the world’s worst industrial disaster.
[20] Alcohol prepared by the distillation of wood is:
A.
Propyl alcohol
B.
Methyl alcohol
C.
Ethyl alcohol
D.
Glycerolx
Ans:
Methyl alcohol
Explanation :
Alcohol prepared by the distillation of wood is Methyl alcohol. It is also called wood spirit.
[21] The metal that is used as a catalyst in the hydrogenation of oils is -
A.
Pb
B.
Ni
C.
Cu
D.
Pt
Ans:
Ni
Explanation :
Ni as catalyst binds both the H2 and the unsaturated substrate and facilitates their union which is the mechanism of hydrogenation of oil while other given element can't able to do so. Ni is used for most reaction as the catalyst because of it is cheaper to run the reaction with it, in commercial world cost- effectiveness is best and desired pathway.
[22] The particle required to continue the chain process of Uranium fission is –
A.
Electron
B.
Proton
C.
Neutron
D.
Positron
Ans:
Neutron
Explanation :
Fission as encountered in the modern world is usually a deliberately produced man-made nuclear reaction induced by a neutron. The nuclear fuels undergo fission when struck by fission neutrons, and in turn emit neutrons when they break apart. This makes possible a self-sustaining nuclear chain reaction that releases energy at a controlled rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.
[23] Which of the following is used to increase the anti-knocking property of petrol?
A.
Tetramethyl lead
B.
Tetraethyl lead
C.
nimethyl lead
D.
Triethyl lead
Ans:
Tetraethyl lead
Explanation :
An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel's octane rating by raising the temperature and pressure at which ignition occurs. Tetraethyllead was admixed with gasoline (petrol) beginning in the 1920s as an inexpensive octane booster which allowed engine compression to be raised substantially, which in turn increased vehicle performance and fuel economy.
[24] Chemical name of bleaching powder is –
A.
Calcium chlorate
B.
Calcium hypochlorite
C.
Calcium chloro hypochlorite
D.
Calcium bi chloride
Ans:
Calcium hypochlorite
Explanation :
Calcium hypochlorite is a chemical compound with formula Ca(ClO)2. It is widely used for water treatment and as a bleaching agent. This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochlorite.
[25] Alcoholic OH) group can be identified by :
A.
Tolien's Reagent Test
B.
Esterification Test
C.
FeCl3 Test
D.
Ozonolysis Reaction
Ans:
FeCl3 Test
Explanation :
As phenol is an aromatic alcohol, so FeCl3 test is a test for alcohol and esterificaton test is also a test for alcohol. The ferric chloride test is used to determine the presence or absence of phenols in a given sample (for instance natural phenols in a plant extract).
Explanation :
The Bhopal gas tragedy involved the leakage of poisonous methyl isocyanate (MIC) gas and other chemicals at the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh, on the night of 2–3 December 1984. It is considered the world’s worst industrial disaster.
[20] Alcohol prepared by the distillation of wood is:
A.
Propyl alcohol
B.
Methyl alcohol
C.
Ethyl alcohol
D.
Glycerolx
Ans:
Methyl alcohol
Explanation :
Alcohol prepared by the distillation of wood is Methyl alcohol. It is also called wood spirit.
[21] The metal that is used as a catalyst in the hydrogenation of oils is -
A.
Pb
B.
Ni
C.
Cu
D.
Pt
Ans:
Ni
Explanation :
Ni as catalyst binds both the H2 and the unsaturated substrate and facilitates their union which is the mechanism of hydrogenation of oil while other given element can't able to do so. Ni is used for most reaction as the catalyst because of it is cheaper to run the reaction with it, in commercial world cost- effectiveness is best and desired pathway.
[22] The particle required to continue the chain process of Uranium fission is –
A.
Electron
B.
Proton
C.
Neutron
D.
Positron
Ans:
Neutron
Explanation :
Fission as encountered in the modern world is usually a deliberately produced man-made nuclear reaction induced by a neutron. The nuclear fuels undergo fission when struck by fission neutrons, and in turn emit neutrons when they break apart. This makes possible a self-sustaining nuclear chain reaction that releases energy at a controlled rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.
[23] Which of the following is used to increase the anti-knocking property of petrol?
A.
Tetramethyl lead
B.
Tetraethyl lead
C.
nimethyl lead
D.
Triethyl lead
Ans:
Tetraethyl lead
Explanation :
An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel's octane rating by raising the temperature and pressure at which ignition occurs. Tetraethyllead was admixed with gasoline (petrol) beginning in the 1920s as an inexpensive octane booster which allowed engine compression to be raised substantially, which in turn increased vehicle performance and fuel economy.
[24] Chemical name of bleaching powder is –
A.
Calcium chlorate
B.
Calcium hypochlorite
C.
Calcium chloro hypochlorite
D.
Calcium bi chloride
Ans:
Calcium hypochlorite
Explanation :
Calcium hypochlorite is a chemical compound with formula Ca(ClO)2. It is widely used for water treatment and as a bleaching agent. This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochlorite.
[25] Alcoholic OH) group can be identified by :
A.
Tolien's Reagent Test
B.
Esterification Test
C.
FeCl3 Test
D.
Ozonolysis Reaction
Ans:
FeCl3 Test
Explanation :
As phenol is an aromatic alcohol, so FeCl3 test is a test for alcohol and esterificaton test is also a test for alcohol. The ferric chloride test is used to determine the presence or absence of phenols in a given sample (for instance natural phenols in a plant extract).
Explanation :
Ni as catalyst binds both the H2 and the unsaturated substrate and facilitates their union which is the mechanism of hydrogenation of oil while other given element can't able to do so. Ni is used for most reaction as the catalyst because of it is cheaper to run the reaction with it, in commercial world cost- effectiveness is best and desired pathway.
[22] The particle required to continue the chain process of Uranium fission is –
A.
Electron
B.
Proton
C.
Neutron
D.
Positron
Ans:
Neutron
Explanation :
Fission as encountered in the modern world is usually a deliberately produced man-made nuclear reaction induced by a neutron. The nuclear fuels undergo fission when struck by fission neutrons, and in turn emit neutrons when they break apart. This makes possible a self-sustaining nuclear chain reaction that releases energy at a controlled rate in a nuclear reactor or at a very rapid uncontrolled rate in a nuclear weapon.
[23] Which of the following is used to increase the anti-knocking property of petrol?
A.
Tetramethyl lead
B.
Tetraethyl lead
C.
nimethyl lead
D.
Triethyl lead
Ans:
Tetraethyl lead
Explanation :
An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel's octane rating by raising the temperature and pressure at which ignition occurs. Tetraethyllead was admixed with gasoline (petrol) beginning in the 1920s as an inexpensive octane booster which allowed engine compression to be raised substantially, which in turn increased vehicle performance and fuel economy.
[24] Chemical name of bleaching powder is –
A.
Calcium chlorate
B.
Calcium hypochlorite
C.
Calcium chloro hypochlorite
D.
Calcium bi chloride
Ans:
Calcium hypochlorite
Explanation :
Calcium hypochlorite is a chemical compound with formula Ca(ClO)2. It is widely used for water treatment and as a bleaching agent. This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochlorite.
[25] Alcoholic OH) group can be identified by :
A.
Tolien's Reagent Test
B.
Esterification Test
C.
FeCl3 Test
D.
Ozonolysis Reaction
Ans:
FeCl3 Test
Explanation :
As phenol is an aromatic alcohol, so FeCl3 test is a test for alcohol and esterificaton test is also a test for alcohol. The ferric chloride test is used to determine the presence or absence of phenols in a given sample (for instance natural phenols in a plant extract).
Explanation :
An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel's octane rating by raising the temperature and pressure at which ignition occurs. Tetraethyllead was admixed with gasoline (petrol) beginning in the 1920s as an inexpensive octane booster which allowed engine compression to be raised substantially, which in turn increased vehicle performance and fuel economy.
[24] Chemical name of bleaching powder is –
A.
Calcium chlorate
B.
Calcium hypochlorite
C.
Calcium chloro hypochlorite
D.
Calcium bi chloride
Ans:
Calcium hypochlorite
Explanation :
Calcium hypochlorite is a chemical compound with formula Ca(ClO)2. It is widely used for water treatment and as a bleaching agent. This chemical is considered to be relatively stable and has greater available chlorine than sodium hypochlorite.
[25] Alcoholic OH) group can be identified by :
A.
Tolien's Reagent Test
B.
Esterification Test
C.
FeCl3 Test
D.
Ozonolysis Reaction
Ans:
FeCl3 Test
Explanation :
As phenol is an aromatic alcohol, so FeCl3 test is a test for alcohol and esterificaton test is also a test for alcohol. The ferric chloride test is used to determine the presence or absence of phenols in a given sample (for instance natural phenols in a plant extract).
Explanation :
As phenol is an aromatic alcohol, so FeCl3 test is a test for alcohol and esterificaton test is also a test for alcohol. The ferric chloride test is used to determine the presence or absence of phenols in a given sample (for instance natural phenols in a plant extract).