Chemistry – OLQs

Chemistry » OLQs


S. No. Questions Answers
1. Tube light is filled with? Mercury Vapour & Argon
2. Other name of “FOOL’S GOLD” is? Iron Pyrite
3. Non-stick coating in utensils is of? TEFLON
4. Compounds responsible for temporary hardness of water? Bicarbonates of Calcium
and Magnesium
5. Compounds responsible for permanent hardness of water? Sulphates and Chlorides of Calcium and Magnesium
6. Gases used for ripening raw fruits? Ethylene & Acetylene
7. Main ore of Mercury is______? Cinnabar
8. Egg shell is made up of______? Calcium Carbonate
9. ______ is known as Artificial Silk. Reyon
10. Water soluble Vitamins______. B & C
11. Fat Soluble Vitamins______. A, D, E & K
12. Common preservative in food processing industry is? Benzoic Acid
13. First organic compound synthesized in laboratory & by whom? Urea by Friedrich Wöhler
14. What blackens silver’s shine? Ozone Gas
15. Substance used in Cancer treatment? Cobalt – 60
16. Cobalt is found in______? Vitamin B12
17. Iron is extracted from which ore? Hematite
18. Aluminium is extracted from which ore? Bauxite
19. Copper is extracted from which ore? Copper Pyrite
20. Chemical name of ‘Washing Soda’ is? Sodium Carbonate
21. Gases used in welding are _______? Acetylene & Oxygen
22. Gases used by sea divers for breathing are ____? Oxygen & Helium
23. Best sources for Vitamin D are______? Sunlight & Fish liver
24. Zinc Phosphide is used as______? Rat Poison
25. Fuse wire is made up of______. Lead and Tin
26. Purest form of Iron is______? Wrought Iron
27. Radium is extracted from ______. Pitchblende
28. Which agent is as ‘seed’ in artificial rain? Silver Iodide
29. Oxides of metals are ______. Alkaline
30. During the process of ‘rusting’, the weight of iron ______. Increases
31. ______ (metal) is liquid at room temperature. Gallium
32. ______ is used to prepare fire proof and water proof clothes. Calcium hydride
33. Galvanised iron is coated with? Zinc
34. Chemical name of Chromic Acid is______? Chromium trioxide
35. Which metal is used in Photoelectric cell? Selenium
36. Barium Hydroxide is also known as? Baryta Water
37. ______ elements are non-metal. Electronegative
38. ______ is known as heavy water and used in nuclear reactor as moderator. Deuterium Oxide (D2O)
39. Deuterium is ______ of Hydrogen. Isotope
40. Ozone is _______ of Oxygen. Allotrope
41. Ammonia (NH3) is synthesized through? Haber’s Process
42. Chlorine is used to prepare _________ PVC, Insecticides, herbicides
43. Which catalyst is used for the synthesis of Vanaspati Ghee? Nickle (Ni)
44. Which catalyst is used for the synthesis of Sulphuric Acid by Contact Process? Platinum (Pt)
45. Chemical name of Picric Acid is? Tri Nitro Phenol
46. ______ is known as laughing gas? N2O
47. Chloroform in sunlight forms poisonous gas ______. Phosgene
48. Platinum is also called _____. White Gold
49. Which material is used in making of safety matches? Red Phosphorous
50. Nail polish remover contains? Acetone
51. Which acid is present in Orange? Citric Acid
52. Lead pencil contains _____. Graphite
53. Which gas is used in filling electric bulbs ______? Argon
54. Lightest metal? Lithium
55. Acid rain is due to air pollution by? Nitrous Oxide & Sulphur
56. Ozone is ______.. Diamagnetic
57. Petroleum is found in ______.. Sedimentary Rocks
58. All noble gases are______? Colourless and Odourless
59. The most abundant element in the earth’s crust is? Oxygen
60. The lustre of a metal is due to _______. Presence of free electrons
61. Which gas is used in fire extinguisher? Carbon dioxide
62. Which gas is used in cigarette lighters? Butane
63. Biogas chiefly contains ______. Methane
64. Chemical used as fixer in Photography is ______. Sodium thiosulphate
65. Aspirin is ______. Acetyl Salicylic Acid
66. _____ is also known as ‘Stranger Gas.’ Xenon
67. Natural rubber is a polymer derived from ______. Isoprene
68. ‘Oil of Vitriol’ is ______. Sulphuric acid
69. Paper is chemically _______. Cellulose
70. Impurity present in ore is ________. Gangue
71. Which is known as ‘Metal of Future’? Titanium
72. Efficiency of the catalyst depends on its? Molecular State
73. Most of the explosions in mines occurs due to mixing of ______ . Methane with air
74. Vinegar is an aqueous solution of ______. Acetic acid
75. Kerosene is a mixture of _____. Aliphatic hydrocarbons
76. The important metal used with iron to produce stainless steel is _____. Chromium
77. Which gas is responsible for the swelling of bread? Carbon dioxide
78. The metal constituent of chlorophyll is _____. Magnesium
79. Which acid is used for etching glass? Hydrofluoric acid (HF)
80. Paraffin wax is _________. Saturated hydrocarbon
81. Solder is an alloy of _____. Tin and Lead
82. Alum is used as A purifier for water
83. Nuclear fuel in the sun is ______. Helium
84. Dead organisms are transformed into petroleum and natural gas ______. Absence of air
85. Organic Compounds are only soluble in _____. Non-polar solvents
86. Which acid is used in soft drinks? Carbonic acid (H2CO3)
87. Which acid is present in Bee Sting? Methanoic Acid
88. Tooth enamel is made up of ______. Calcium Phosphate
89. The name ‘catalyst’ was given by _____. Berzilius
90. A polymeric substance used to make parachute is _____. Viscose
91. What is used to avoid melting of ice? Gelatine
92. Carbon occur in the nature in the purest form as? Diamond
93. Oxidation is defined as _____. Loss of electrons
94. In nuclear reactor, chain reaction is controlled by using _____. Cadmium rod
95. The radioactive element most commonly detected in humans is _____ . Potassium – 40
96. Hydrogen bomb is based on the principle of _____. Nuclear fusion
97. The ultrapure metal is obtained by _____. Zone refining
98. Most abundant metal in earth’s crust is ______. Aluminium
99. Balloons are filled with _____. Helium
100. The element common to all acids is _____. Hydrogen
Subject Name : Chemistry
Posts Name : Technical Assistant, Junior Scientist, Post Graduate Teacher, Lecturer
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