Boost your exam preparation with Chemistry solved PKMCQs with answers on Pak MCQs forum. Covering key topics for NTS, FPSC, PPSC, and ETEA, these solved MCQs help strengthen your chemistry concepts. Start practicing today!
Chemistry Solved PKMCQs with Answers – Pak MCQs Forum
51. The chemical formula of common salt is:
a) Na₂CO₃
b) KCl
c) NaCl ✅
d) MgCl₂
52. The most malleable metal is:
a) Copper
b) Gold ✅
c) Silver
d) Iron
53. The gas used in fire extinguishers is:
a) Oxygen
b) Carbon dioxide ✅
c) Hydrogen
d) Nitrogen
54. The process of converting sugar into alcohol is called:
a) Oxidation
b) Fermentation ✅
c) Sublimation
d) Neutralization
55. The non-metal which is a good conductor of electricity is:
a) Sulfur
b) Carbon (Graphite) ✅
c) Phosphorus
d) Bromine
56. The metal used in X-ray shields is:
a) Aluminum
b) Lead ✅
c) Zinc
d) Copper
57. The chemical symbol for potassium is:
a) K ✅
b) P
c) Pt
d) Po
58. The process of heating ore in the absence of air is called:
a) Smelting
b) Calcination ✅
c) Roasting
d) Refining
59. The softest metal is:
a) Lithium ✅
b) Sodium
c) Gold
d) Lead
60. The metal used in galvanizing iron is:
a) Copper
b) Zinc ✅
c) Lead
d) Aluminum
61. The metal that does not react with water is:
a) Sodium
b) Potassium
c) Gold ✅
d) Magnesium
62. The chemical formula of ammonia is:
a) NH₄
b) NH₃ ✅
c) NO₂
d) N₂H₄
63. The process of converting a gas into liquid is called:
a) Evaporation
b) Condensation ✅
c) Sublimation
d) Crystallization
64. The metal used in making electric wires is:
a) Iron
b) Copper ✅
c) Aluminum
d) Zinc
65. The metal that is liquid at room temperature is:
a) Zinc
b) Lead
c) Mercury ✅
d) Silver
66. The element essential for respiration is:
a) Carbon
b) Oxygen ✅
c) Nitrogen
d) Helium
67. The chemical name of vinegar is:
a) Hydrochloric acid
b) Acetic acid ✅
c) Sulfuric acid
d) Nitric acid
68. The chemical formula for methane is:
a) CH₃
b) CH₄ ✅
c) C₂H₆
d) CO₂
69. The most reactive metal is:
a) Sodium
b) Potassium ✅
c) Calcium
d) Iron
70. The gas used in glowing signboards is:
a) Neon ✅
b) Oxygen
c) Hydrogen
d) Nitrogen
71. The gas that supports combustion is:
a) Carbon dioxide
b) Oxygen ✅
c) Nitrogen
d) Hydrogen
72. The element present in all organic compounds is:
a) Oxygen
b) Hydrogen
c) Carbon ✅
d) Nitrogen
73. The chemical name of washing soda is:
a) Sodium carbonate ✅
b) Sodium bicarbonate
c) Calcium carbonate
d) Magnesium sulfate
74. Which substance is used to make matchstick heads?
a) Phosphorus ✅
b) Magnesium
c) Sulfur
d) Carbon
75. The most abundant metal in Earth's crust is:
a) Iron
b) Aluminum ✅
c) Copper
d) Zinc
76. The element that glows in the dark is:
a) Sulfur
b) Phosphorus ✅
c) Magnesium
d) Calcium
77. The process of converting a solid directly into gas is called:
a) Evaporation
b) Condensation
c) Sublimation ✅
d) Crystallization
78. The gas used in refrigerators is:
a) Oxygen
b) Nitrogen
c) Freon ✅
d) Hydrogen
79. The metal that does not rust is:
a) Iron
b) Copper
c) Gold ✅
d) Aluminum
80. The gas that turns limewater milky is:
a) Oxygen
b) Carbon dioxide ✅
c) Hydrogen
d) Nitrogen
81. The chemical formula of hydrochloric acid is:
a) H₂SO₄
b) HCl ✅
c) HNO₃
d) H₂CO₃
82. The gas used in balloons is:
a) Oxygen
b) Nitrogen
c) Helium ✅
d) Hydrogen
83. Which acid is used in car batteries?
a) Nitric acid
b) Sulfuric acid ✅
c) Hydrochloric acid
d) Acetic acid
84. The metal present in blood is:
a) Zinc
b) Iron ✅
c) Magnesium
d) Copper
85. The process of separating a liquid by boiling and condensation is:
a) Filtration
b) Distillation ✅
c) Crystallization
d) Decantation
86. The pH value of pure water is:
a) 5
b) 6
c) 7 ✅
d) 8
87. The element used in electric bulbs is:
a) Iron
b) Tungsten ✅
c) Copper
d) Lead
88. The chemical name of table sugar is:
a) Glucose
b) Sucrose ✅
c) Fructose
d) Maltose
89. The metal used in fireworks to produce a bright white flame is:
a) Aluminum
b) Magnesium ✅
c) Copper
d) Zinc
90. The noble gas used in photography flash lamps is:
a) Neon
b) Xenon ✅
c) Argon
d) Helium
91. The chemical formula of rust is:
a) Fe₂O₃ ✅
b) FeO
c) Fe₃O₄
d) FeCO₃
92. The metal used to coat steel to prevent rusting is:
a) Copper
b) Zinc ✅
c) Silver
d) Aluminum
93. The process of heating sugar to form caramel is called:
a) Fermentation
b) Caramelization ✅
c) Oxidation
d) Reduction
94. The hardest known natural substance is:
a) Graphite
b) Diamond ✅
c) Iron
d) Quartz
95. The metal extracted from hematite ore is:
a) Copper
b) Iron ✅
c) Zinc
d) Aluminum
96. The gas produced by burning coal in limited oxygen is:
a) Oxygen
b) Carbon monoxide ✅
c) Carbon dioxide
d) Sulfur dioxide
97. The lightest gas is:
a) Oxygen
b) Nitrogen
c) Hydrogen ✅
d) Helium
98. Which of the following metals is liquid at room temperature?
a) Mercury ✅
b) Gold
c) Copper
d) Zinc
99. Which gas is known as laughing gas?
a) Carbon monoxide
b) Nitrous oxide (N₂O) ✅
c) Hydrogen sulfide
d) Oxygen
100. The element that forms the basis of organic chemistry is:
a) Hydrogen
b) Carbon ✅
c) Nitrogen
d) Oxygen
0 comments:
Post a Comment