GK INFOPEDIA

[1] Chemically fats and oils are: A. Triesters B. Amines C. Aldehydes D. Ketons Ans: Triesters Explanation : Fats and oils are called triglycerides (or triacylcylgerols) because they are esters composed of three fatty acid units joined to glycerol, a trihydroxy alcohol. Fats and oils are composed of molecules known as triglycerides, which are esters. […]

[1] J.J. Thomson’s proposed model of action is generally called model. A. Cream and cake B. Plum and pudding C. (4) Plum and cake D. Cream and pudding Ans: Plum and pudding Explanation : The plum pudding model, one of several scientific models of the atom, was first proposed by J. J. Thomson in 1904 […]

[1] Which of the following is used to iodise common salt? A. Potassium iodide B. Iodine C. Potassium iodate D. Sodium iodide Ans: Potassium iodate Explanation : Iodized salt (also spelled iodised salt) is table salt mixed with a minute amount of various salts of the element iodine. Table salt with iodide salt slowly loses […]

[1] Seaweeds are important source of – A. fluorine B. chlorine C. bromine D. iodine Ans: iodine Explanation : Seaweed is a source of iodine, necessary for thyroid function and to prevent goitre. However, an excess of iodine is suspected in the heightened cancer risk in Japanese who consume a lot of the plant. [2] […]

[1] Which of the inert gases can form compounds? A. Helium B. Xenon C. Krypton D. Argon Ans: Xenon Explanation : Xenon compounds are the most numerous of the noble gas compounds that have been formed. Most of them have the xenon atom in the oxidation state of +2, +4, +6, or +8 bonded to […]

[1] Which among the following is used in making liquors, medicines and as a fuel in aircrafts? A. Propyl alcohol B. Dimethyl alcohol C. Ethyl alcohol D. Methyl alcohol Ans: Ethyl alcohol Explanation : Ethyl alcohol (C2H5), also known as ethanol, is a member of a class of organic compounds that are given the general […]

[1] The deterioration of a metal by an electrochemical process is commonly termed as – A. Erosion B. Corrosion C. Passivation D. Abrasion Ans: Corrosion Explanation : Corrosion can be defined as the deterioration of materials by chemical processes. Of these, the most important by far is electrochemical corrosion of metals, in which the oxidation […]

[1] At room temperature, the metal that remains liquid is: A. Mercury B. Platinum C. Lead D. Zinc Ans: Mercury Explanation : Mercury is the only metal that is a liquid at normal temperatures and pressure. At room temperatureand pressure, mercury neither readily share valence electrons with other atoms nor interact with each other to […]

[1] Of the following which one pollutes the air of a big city? A. Copper B. Chromium C. Lead D. Calcium Ans: Lead Explanation : Lead pollution primarily came from cars in the past. Today, lead pollution primarily comes from lead smelters, metal processing plants and incinerators. Deposits of lead in soil can harm both […]

[1] Which is abundant in Gobar gas? A. Carbon dioxide B. Methane C. Oxygen D. Hydrogen Ans: Methane Explanation : Bio gas is a clean unpolluted and cheap source of energy in rural areas. It consists of 55-70% methane which is inflammable. Bio gas is produced from cattle dung in a bio gas plant commonly […]