2. Which of the following gas leaked in the Bhopal Gas tragedy in December 1984?
Correct : A. Methyl isocyanate
3. Which acid is used in rubber, textile, leather and electroplating industries?
Correct : B. Methanoic acid
4. Study of Fossils is known as?
Correct : A. Paleontology
5. A substance which readily forms colloidal solution in contact with water is called –
Correct : D. Hydrophilic colloid
6. Denatured spirit is ethanol mixed with
Correct : D. Pyridine
7. The most abundant inert gas in the atmosphere is –
Correct : C. Argon
8. Nuclear energy is a mineral-based energy source. It is derived from –
Correct : A. uranium
9. Zinc sulphide is commonly used as –
Correct : C. rodenticide
10. Galena is a mineral of –
Correct : C. lead
11. Magnalium is an alloy of –
Correct : A. Aluminium and Magnesium
12. Which of the toxic heavy metals is found in modern tannery industries?
Correct : C. Chromium
13. Which of the following contains high content of lead?
Correct : C. High octane fuel
14. Acids on reacting with metals release which of the following gases?
Correct : C. Hydrogen
15. Carbon reacts with metal to form -
Correct : A. Carbide
16. Radioactive disintegration of Uranium ultimately results in formation of -
Correct : D. Lead
17. Energy use in solar cookers, solar distillation plants, solar power plants is known as –
Correct : B. solar energy
18. 'Vinegar' is a commercial name of –
Correct : C. Acetic acid
19. Which metal does not undergo corrosion due to the formation of oxide layer?
Correct : C. Aluminium
20. The acid present in red ants is –
Correct : D. Formic acid
21. The metal extracted from Bauxite is –
Correct : D. Aluminum
22. pH value between 6.5-7.5 makes the soil
Correct : D. None of these
23. The metal chiefly used for galvanizing iron is:
Correct : A. Zine
24. Submarines move under water. They have engines that run on -
Correct : B. Diesel
25. The Bhopal gas tragedy was caused by the gas -
Correct : C. Methyl Iso Cyanate
26. The wine is prepared by the process of
Correct : A. fermentation
27. Fission and fusion are called -
Correct : C. nuclear reactions
28. Acids on reacting with metal carbonates release which of the following gases?
Correct : B. Carbon Dioxide
29. Which of the following is released during photosynthesis?
Correct : A. Oxygen
30. Who discovered electron?
Correct : B. J. J. Thomson
31. Which of the following is also known as Carbolic Acid?
Correct : A. Phenol
32. Galvanization of iron is carried out using –
Correct : A. Zinc
33. Cokking gas is a mixture of -
Correct : C. butane and propane
34. The purest form of water is –
Correct : B. rain water
35. The main constituent of biogas is –
Correct : B. methane
36. Which metal is extracted from sea water?
Correct : B. Magnesium
37. Percentage of lead in lead pencils is –
Correct : A. "0"
38. When formaldehyde and potassium hydroxide are heated, we get –
Correct : B. Methyl alcohol
39. When conc. H2SO4 is added to diy KNO3, brown fumes are evolved. These fumes are due to –
Correct : C. NO2
40. Pasteurisation of milk means –
Correct : B. heating of milk to above 62°C
41. Aluminium can be purified by –
Correct : C. electrolysis
42. Which among the following elements is found in maximum percentage in the human body?
Correct : D. Oxyzen
43. Which of the following acids is present in sour milk?
Correct : B. Lactic acid
44. Non-metallic oxides are in nature.
Correct : B. Acidic
45. Detergents used for cleaning clothes and utensils contain –
Correct : C. sulphonates
46. Radioactive disintegration of uranium ultimately results in formation of –
Correct : D. lead
47. Impure camphor is purified by –
Correct : A. sublimation
48. Which among the following stage is suitable indicator when solution of sodium carbonate is mixed with sulphuric acid?
Correct : D. Methyl orange
49. In which of the following states maximum iron are is found?
Correct : B. Fe2O3
50. Greenhouse effect is caused by –
Correct : B. carbon dioxide
51. The polymer used in making plastic crockery is –
Correct : D. Melamine
52. Vulcanization of rubber is carried out by adding –
Correct : A. Sulphur
53. Helium gas is used in gas balloons instead of hydrogen gas be-cause it is –
Correct : C. non-combustible
54. Aspirin is chemically known as –
Correct : C. acetylsalicylic acid
55. The most abundant element in the human body is –
Correct : D. oxygen
56. Dry powder fire extinguishers contain -
Correct : D. sand and sodium bicarbonate
57. Which type of glass is used for making glass reinforced plastic?
Correct : D. Fibre glass
58. Who invented radar?
Correct : B. A H Taylor and Leo C Young
59. In which following processes light energy is converted into chemical energy?
Correct : C. Photosynthesis
60. What is the common characteristic of the elements of the same group in the periodic table?
Correct : A. Electrons in outer most shell
61. The fiber least prone to catch fire is –
Correct : C. cotton
62. Which of the following hormone is called emergency hormone?
Correct : B. Adrenaline
63. Polythene is industrially prepared by the polymerization of -
Correct : D. Ethylene
64. Molasses a by-product in the manufacture of sugar, is converted into -
Correct : A. alcohol
65. The wire of flash bulb is made of :
Correct : C. Magnesium
66. The coloured discharge tubes for advertisement mainly contain -
Correct : D. Neon
67. Muscle fatigueisaccumulation of :
(1) Pyruvic acid(2) Lactic acid(3) Oxalacetic acid(4) Uric acidQ.30) A mixture of water and alcohol can be separated by -
Correct : C. Distillation
68. Setting of plaster of paris involves –
Correct : B. hydration to form other hydrates
69. The common name for the com-pound having formal NaOH is –
Correct : A. Caustic soda
70. Energy stored in a coal is -
Correct : C. chemical energy
71. Which of the following is the most common element in the Universe?
Correct : C. Hydrogen
72. wo elements which are used to absorb neutrons to control the chain reaction during nuclear fission are -
Correct : A. Boron and Cadmium
73. The most commonly used chemicals in the artificial rainmaking or cloud seeding are
Correct : A. Silver Iodide (AgI)
74. Which of the following is not a greenhouse gas?
Correct : A. Hydrogen
75. Wax used for making candle is chemically a mixture of –
Correct : A. aliphatic hydrocarbons
76. The gas used in the artificial ripening of fruits is –
Correct : A. Acetylene
77. Ruby and sapphire are oxides of –
Correct : D. aluminium
78. Preparation of `Dalda or Vanaspati' ghee from vegetable oil utilizes the following process :
Correct : C. Hydrogenation
79. Smoke is formed due to –
Correct : A. Solid dispersed in gas
80. Type metal used in printing press is an alloy of –
Correct : B. lead and antimony
81. Sour taste of 'Coca Cola' is due to the presence of –
Correct : B. phosphoric acid
82. Which of the following is used in making smoke bombs?
Correct : D. Carbon
83. German silver is an alloy of –
Correct : C. zinc, copper and nickel
84. Acids turn blue litmus into which color?
Correct : B. Red
85. Haemoglobin is used to transport in humans.
Correct : A. Oxygen
86. Commercial nitric acid is coloured because it contains dissolved –
Correct : C. Nitrogen dioxide
87. Fertiliser having high nitrogen content is –
Correct : C. Ammonium nitrate
88. Bhopal has tragedy is associated with leakage of –
Correct : D. methyl isocyanate
89. Bauxite is an alloy of which of the following metals?
Correct : A. Aluminium
90. Nucleus of an atom consists of.
Correct : C. Proton and Neutron
91. Where does the oxygen that keeps us alive come from?
Correct : D. Water
92. The gas used for artificial fruit ripening of green fruit is –
Correct : A. Ethylent
93. Magnets attract magnetic substances are iron, nickel, cobalt, etc. They can also repel -
Correct : C. diamagnetic substances
94. Atomic mass of Sulphur is 32u. The number of moles in 16 games of Sulphur is:
Correct : B. 0.5 moles of Sulphur
95. A metal is exposed to the atmosphere for some time. It becomes coated with green carbonate. The metal must be –
Correct : B. copper
96. Whic of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torch lights, electric shavers, etc.?
Correct : B. Nickel and cadmium
97. Iodized salt is beneficial for –
Correct : C. thyroid function
98. Which of the following chemicals is used in photography?
Correct : B. Silver bromide
99. Fungi are plants that lack -
Correct : C. Chlorophyll
100. The gas which turns into liquid at the lowest temperature among the following is –