Answer: (D) Acetic acid
19. Accumulation of which one of the following in the muscles leads to fatigue?
(A) Lactic acid
(B) Benzoic acid
(C) Pyruvic acid
(D) Uric acid
Answer: (A) Lactic acid
20. Which one of the following polymer is widely used for making bulletproof materials?
(A) Polyvinyl chloride
(B) Polyamides
(C) Polyethylene
(D) Polycarbonates
Answer: (B) Polyamides
21. A polymer used for making non-stick surface coating for utensils is____
(A) Polyvinyl chloride
(B) Teflon
(C) Polystyrene
(D) Polypropylene
Answer: (B) Teflon
22. Which one of the following was used as a chemical weapon in the First World War?
(A) Carbon monoxide
(B) Hydrogen cyanide
(C) Mustard gas
(D) Water gas
Answer: (C) Mustard gas
23. Leakage of which of the following gases had caused the Bhopal Gas Tragedy?
(A) Methyl isocyanate
(B) Carbon mono-oxide
(C) Nitric oxide
(D) Sulphur dioxide
Answer: (A) Methyl isocyanate
24. Which one of the following chemical helps in fruit ripening?
(A) Ethephon
(B) Atrazine
(C) Isoproturan
(D) Malathion
Answer: (A) Ethephon
25. Which of the following gas mixture is used in welding gas?
(A) Acetylene and Hydrogen
(B) Oxygen and Acetylene
(C) Hydrogen and Oxygen
(D) Hydrogen and Helium
Answer: (B) Oxygen and Acetylene
26. Which one of the following pairs is not correctly matched?
(A) Fullerene – Organic compounds containing fluorine
(B) Dry Ice – Solid carbon dioxide
(C) Keratin – Protein found in the outer layer of human skin
(D) Mustard gas – Poisonous liquid used in chemical warfare
Answer: (A) Fullerene – Organic compounds containing fluorine
27. What is the liquid used by goldsmiths to melt gold?
(A) Nitric acid and Sulphuric acid
(B) Nitric acid and Hydrochloric acid
(C) Sulphuric acid and Hydrochloric acid
(D) Citric acid and Benzoic acid
Answer: (B) Nitric acid and Hydrochloric acid
28. Baking soda is_____
(A) Sodium Hydrogen Carbonate
(B) Sodium Dihydrogen Carbonate
(C) Disodium Hydrogen Carbonate
(D) Sodium Carbonate
Answer: (A) Sodium Hydrogen Carbonate
29. Which chemical compound is present in Bleaching Powder?
(A) Calcium Hydroxide
(B) Calcium Oxychloride
(C) Calcium Carbonate
(D) Ammonium Chloride
Answer: (B) Calcium Oxychloride
30. Which one of the following substances is used in photography and also as an antichlor?
(A) Chrome red
(B) Sodium thiosulphate
(C) Hydrogen peroxide
(D) Calomel
Answer: (B) Sodium thiosulphate
31. Which of the following gas is used as tear gas?
(A) H₂
(B) SO₂
(C) NH₃
(D) Cl₂
Answer: (D) Cl₂ (Chlorine)
32. Which is used as Laughing gas?
(A) Nitrous oxide
(B) Nitrogen dioxide
(C) Nitrogen trioxide
(D) Nitrogen tetra oxide
Answer: (A) Nitrous oxide
33. What is heavy water?
(A) Oxygen + Heavy Hydrogen
(B) Hydrogen + Oxygen
(C) Hydrogen + New Oxygen
(D) Heavy Hydrogen + Heavy
Answer: (A) Oxygen + Heavy Hydrogen
34. Heavy water is that water____
(A) The temperature of which is kept constant at 4ºC
(B) In which insoluble salts of Calcium and Potassium are present
(C) In which isotopes takes place of Hydrogen
(D) In which isotopes takes place of Oxygen
Answer: (C) In which isotopes takes place of Hydrogen
35. The gas used in the manufacture of Vanaspati Ghee from Vanaspati Oil is____
(A) Hydrogen
(B) Oxygen
(C) Nitrogen
(D) Carbon dioxide
Answer: (A) Hydrogen
36. Chemically Dry Ice is___
(A) Solid sulphur
(B) Ice made from distilled water
(C) Mixture of ice and common salt
(D) Solid carbon dioxide
Answer: (D) Solid carbon dioxide
37. A Tubelight is filled with____
(A) Sodium vapour
(B) Argon gas at low pressure
(C) Mercury vapour at low pressure
(D) Both (B) and (C)
Answer: (D) Both (B) and (C)
38. Which one of the following types of coal contains a higher percentage of Carbon than the rest type of ?
(A) Bituminous coal
(B) Lignite
(C) Peat
(D) Anthracite
Answer: (D) Anthracite
39. Which of the following elements are included in stainless steel?
(A) Chromium, Nickel and Iron
(B) Nickel, Iron and Carbon
(C) Iron, Chromium, Manganese and Carbon
(D) Iron, Zinc, Chromium and Carbon
Answer: (A) Chromium, Nickel and Iron
40. Bronze is an alloy of____
(A) Copper and Tin
(B) Copper and Silver
(C) Copper and Zinc
(D) Copper and Lead
Answer: (A) Copper and Tin
41. In the case of rusting, the weight of iron___
(A) Increases
(B) Decreases
(C) Remains the same
(D) Uncertain
Answer: (A) Increases
42. Brass is a combination of what metals?
(A) Copper and Nickel
(B) Copper and Tin
(C) Copper and Zinc
(D) Copper + Zinc and Nickel
Answer: (C) Copper and Zinc
43. Bauxite is an ore of which of the following metals?
(A) Iron
(B) Copper
(C) Aluminium
(D) Silver
Answer: (C) Aluminium
44. Mica is a _____
(A) Good conductor of heat and bad conductor of electricity
(B) Bad conductor of both heat and electricity
(C) Good conductor of heat and electricity both
(D) Bad conductor of heat and good conductor of electricity
Answer: (A) Good conductor of heat and bad conductor of electricity
45. The chemical structure of the pearl is _____
(A) Calcium Carbonate
(B) Calcium Carbonate & Magnesium Carbonate
(C) Calcium Chloride
(D) Calcium Sulphate
Answer: (A) Calcium Carbonate
46. The chemical composition of diamond is_____
(A) Carbon
(B) Nitrogen
(C) Nickel
(D) Zinc
Answer: (A) Carbon
47. Pasteurization is a process by which ____
(A) Milk is preserved at a very low temperature for 24 hours
(B) Milk is heated for 8 hours
(C) First milk is heated up to a longer time and then cooled suddenly within specified time
(D) None of the above
Answer: (C) First milk is heated up to a longer time and then cooled suddenly within specified time
48. The technique of chromatography is used to_____
(A) Identify colour substances
(B) Determine the structure of substances
(C) Dry distillation of colouring substances
(D) Separate the substances from a mixture
Answer: (D) Separate the substances from a mixture
49. Example of corrosion is_____
(A) Black coating on Silver
(B) Green coating on Copper
(C) Brown coating on Iron
(D) Above three
Answer: (D) Above three
50. The atoms, in which the number of protons is same but the number of neutrons is different, are known as___
(A) Isobars
(B) Isomers
(C) Isotones
(D) Isotopes
Answer: (D) Isotopes
51. Radioactivity is measured by____
(A) Hydrometer
(B) Geiger Counter
(C) Seismometer
(D) Ammeter
Answer: (B) Geiger Counter
52. Which of the following statement about molecular structure is correct?
(A) Neutron and electron are found inside the nucleus and protons revolves around the nucleus
(B) Electron and proton are inside the nucleus and neutron revolve around the nucleus
(C) Proton and neutron are inside the nucleus and electrons revolve around the nucleus
(D) Proton, neutron and electron all are inside the nucleus
Answer: (C) Proton and neutron are inside the nucleus and electrons revolve around the nucleus
53. Constituents of the atomic nucleus are___
(A) Electron and proton
(B) Electron and neutron
(C) Proton and neutron
(D) Proton, neutron and electron
Answer: (C) Proton and neutron
54. Approximately, how many different chemical elements exist in the Earth?
(A) 300
(B) 250
(C) 200
(D) 100
Answer: (D) 100
55. Which one of the following is present in the largest amount in terms of percent by mass in the Earth’s crust?
(A) Silicon
(B) Oxygen
(C) Carbon
(D) Calcium
Answer: (B) Oxygen
56. Which of the following is the most common element in the Universe?
(A) Hydrogen
(B) Oxygen
(C) Nitrogen
(D) Carbon
Answer: (A) Hydrogen
57. The chemical composition of diamond is_____
(A) Carbon
(B) Nitrogen
(C) Nickel
(D) Zinc
58. Which is the hardest in the following?
(A) Diamond
(B) Glass
(C) Quartz
(D) Platinum
Answer: (A) Diamond
59. Which one of the following metals is liquid at ordinary temperature?
(A) Lead
(B) Nickel
(C) Mercury
(D) Tin
Answer: (C) Mercury
60. Which of the following is lighter than water?
(A) Aluminium
(B) Sodium
(C) Magnesium
(D) Manganese
Answer: (B) Sodium
61. Iron is obtained from___
(A) Limestone
(B) Pitch-blende
(C) Monazite Sand
(D) Hematite
Answer: (D) Hematite
62. Galvanized iron is coated with_____
(A) Aluminium
(B) Galena
(C) Silver
(D) Zinc
Answer: (D) Zinc
63. Out of the following which is not an alloy?
(A) Steel
(B) Brass
(C) Bronze
(D) Copper
Answer: (D) Copper
64. Which one of the following alloys is called an amalgam?
(A) Zinc – Copper
(B) Copper – Tin
(C) Mercury – Zinc
(D) Lead – Zinc
Answer: (C) Mercury – Zinc
65. Which lubricant is used for heavy machines?
(A) Bauxite
(B) Phosphorus
(C) Graphite
(D) Silicon oil
Answer: (C) Graphite
66. The substance used as moderator and coolant both, in nuclear reactors is____
(A) Ordinary water
(B) Heavy water
(C) Liquid Ammonia
(D) Liquid Hydrogen
Answer: (B) Heavy water
67. Which is the purest form of water?
(A) Tap water
(B) Sea water
(C) Rain water
(D) Distilled water
Answer: (C) Rain water
68. Which gas is used in the purification of drinking water?
(A) Helium
(B) Chlorine
(C) Fluorine
(D) Carbon Dioxide
Answer: (B) Chlorine
69. Percentage amount (by volume) of which one of the following gas is lowest in the atmosphere?
(A) Argon
(B) Carbon dioxide
(C) Nitrogen
(D) Oxygen
Answer: (B) Carbon dioxide
70. Easily soluble in water____
(A) Carbon
(B) Nitrogen
(C) Ammonia
(D) Iodine
Answer: (C) Ammonia
71. A solution turns red litmus blue. The pH of solution is______
(A) 7
(B) 1
(C) 5
(D) None of these
Answer: (D) None of these
72. Which one of the following substances is used in photography and also as an antichlor?
(A) Chrome red
(B) Sodium thiosulphate
(C) Hydrogen peroxide
(D) Calomel
Answer: (B) Sodium thiosulphate
73. Which chemical compound is present in Bleaching Powder?
(A) Calcium Hydroxide
(B) Calcium Oxychloride
(C) Calcium Carbonate
(D) Ammonium Chloride
Answer: (B) Calcium Oxychloride
74. Which one of the following sets of elements was primarily responsible for the origin of life on the Earth?
(A) Hydrogen, Oxygen, Sodium
(B) Carbon, Hydrogen, Nitrogen
(C) Oxygen, Calcium, Phosphorus
(D) Carbon, Hydrogen, Potassium
Answer: (B) Carbon, Hydrogen, Nitrogen
75. Which of the following is correctly matched?
1. Biogas – Insecticide
2. Electro-cardiography – Heart disorder
3. D.D.T. – Cow dung
4. Nicotine – Tobacco
Code
(A) 1, 2 and 4
(B) 2, 3 and 4
(C) 2 and 3
(D) 2 and 4
Answer: (D) 2 and 4
76. Which one of the following is also known as ‘wood spirit’?
(A) Methyl alcohol
(B) Ethyl alcohol
(C) Ethylene glycol
(D) Glycerol
Answer: (A) Methyl alcohol
77. Which of the following is not a Natural polymer?
(A) Wool
(B) Silk
(C) Leather
(D) Nylon
Answer: (D) Nylon
78. Which one of the following is a natural polymer?
(A) Bakelite
(B) Silk
(C) Kevlar
(D) Lexan
Answer: (B) Silk
79. Which one of the following acids is used in the manufacturing of baking powder?
(A) Oxalic acid
(B) Lactic acid
(C) Tartaric acid
(D) Benzoic acid
Answer: (C) Tartaric acid
80. Which one of the following organic acids is abundant in grapes, tamarind and banana?
(A) Acetic acid
(B) Citric acid
(C) Lactic acid
(D) Tartaric acid
Answer: (D) Tartaric acid
81. Which one of the following is another name of RDX?
(A) Cyanohydrin
(B) Dextran
(C) Cyclohexane
(D) Cyclonite
Answer: (D) Cyclonite
82. Which one of the following is used as an explosive?
(A) Phosphorus Trichloride
(B) Mercuric Oxide
(C) Graphite
(D) Nitroglycerine
Answer: (D) Nitroglycerine
83. Which of the following fossil fuels is the cleanest fuel?
(A) Coal
(B) Petrol
(C) Natural gas
(D) Diesel
Answer: (C) Natural gas
84. Diesel used in heavy vehicles for_____
(A) Extra mileage and save engine
(B) Low expense and save the fuel
(C) High power and financially secure
(D) Being cheaper than low petrol
Answer: (C) High power and financially secure
85. The fuel used in a diesel engine______
(A) Vapour of diesel and air
(B) Diesel only
(C) Mixture of diesel and petrol
(D) Mixture of diesel, air and petrol
Answer: (A) Vapour of diesel and air
86. What is the main component of L.P.G.?
(A) Methane
(B) Ethane
(C) Propane
(D) Butane
Answer: (D) Butane
87. What is the full form of CNG?
(A) Compressed Natural Gas
(B) Cyanogen Natural Gas
(C) Condensed Nitrogen Gas
(D) Controlled Natural Gas
Answer: (A) Compressed Natural Gas
88. Gasohol is a mixture of ____
(A) Ethyl alcohol + Petrol
(B) Natural gas + Ethyl alcohol
(C) Any gas dissolved in alcohol
(D) Ethyl alcohol + Kerosene oil
Answer: (A) Ethyl alcohol + Petrol
89. Milk openly placed for sometime becomes sour due to___
(A) Carbonic acid
(B) Lactic acid
(C) Citric acid
(D) Acetic acid
Answer: (B) Lactic acid
90. Which one of the following forms an irreversible complex with a haemoglobin of the blood?
(A) Carbon Dioxide
(B) Pure Nitrogen gas
(C) Carbon Monoxide
(D) A mixture of Carbon Dioxide and Helium
Answer: (C) Carbon Monoxide
91. Milk is an example of____
(A) A gel
(B) A foam
(C) An emulsion
(D) A suspension
Answer: (C) An emulsion
92. What is detergent?
(A) Soap
(B) Medicine
(C) Catalyst
(D) Refining agent
Answer: (D) Refining agent
93. Which one of the following fertilizers leaves maximum acidity in the soil?
(A) Urea
(B) Ammonium Sulphate
(C) Ammonium Nitrate
(D) Calcium Ammonium Nitrate
Answer: (B) Ammonium Sulphate
94. Which of the following is not a chemical fertilizer?
(A) Urea
(B) Sodium Sulphate
(C) Super Phosphate
(D) Potassium Nitrate
Answer: (B) Sodium Sulphate
95. Which of the following is used as a mosquito repellent?
(A) Pyrethrum
(B) Rotenone
(C) Ephedrine
(D) None of these
Answer: (A) Pyrethrum
96. Which one of the following is used as rat poison?
(A) Zinc Sulphide
(B) Lead Sulphide
(C) Calcium Phosphate
(D) Zinc Phosphide
Answer: (D) Zinc Phosphide
97. Which one of the following solutions of electrolytes is used in the car battery?
(A) Sodium sulphate
(B) Nitric acid
(C) Sulphuric acid
(D) Potassium nitrate
Answer: (C) Sulphuric acid
98. Which is used in Dry Washing?
(A) Petrol
(B) Benzene
(C) Alcohol
(D) All of these
Answer: (D) All of these
99. Which one of the following is not correctly matched?
(A) Magnesium – Fireworks
(B) Uranium – Atom bomb
(C) Silver – Electric bulb
(D) Zinc – Galvanization
Answer: (C) Silver – Electric bulb
100. Which of the following archaeological samples is adopted to determine the age of firewood bone and shell?
(A) Uranium-238
(B) Argon-Isotopes
(C) Carbon-14
(D) Strontium-90
Answer: (C) Carbon-14
