100 Important Chemistry Questions PDF download for SSC CHSL, CGL and RRB Exams - 1

By | April 26, 2018

100 Important Chemistry Questions PDF download for SSC CHSL, CGL and RRB Exams - 1

1. Tube light filled with? -  Mercury Vapour & Argon
2. Another name of “FOOL’S GOLD” is? - Iron Pyrite
3. Non-stick coating on utensils is made off? - TEFLON
4. Compounds responsible for the temporary hardness of water? - Bicarbonates of Calcium and Magnesium
5. Compounds responsible for a permanent hardness of water? - Sulfates and Chlorides of Calcium and Magnesium
6. Gases used for ripening raw fruits? - Ethylene & Acetylene
7. Main ore of Mercury is? - Cinnabar
8. Eggshell is made up of? - Calcium Carbonate
9. ______ is known as Artificial Silk.- Rayon
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. The first organic compound synthesized in laboratory & by whom? - Urea by Friedrich Wöhler
14. What blackens silver’s shine? - Ozone Gas
15. The substance used in Cancer treatment? - Cobalt – 60
16. Cobalt is found in? - Vitamin B12
17. Iron is extracted from which ore? - Hematite
18. Aluminum is extracted from which ore? - Bauxite
19. Copper is extracted from which ore? - Copper Pyrite
20. The 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 of 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. The purest form of Iron is? Wrought Iron
27. Radium is extracted from ______ . - Pitchblende
28. Which agent is as ‘seed’ in the 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 fireproof and waterproof clothes. - Calcium hydride
33. Galvanised iron is coated with? - Zinc
34. The chemical name of Chromic Acid is? - Chromium trioxide
35. Which metal is used in a 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 a 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. The 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 dioxide
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. ______ is used as A purifier for water Alum
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 _____ . - Berzelius
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 ______ . - Aluminum
99. Balloons are filled with _____  - Helium
100 The element common to all acids is _____ . - Hydrogen

PDF CREDIT: OMonlinementors

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