Practice 100 Inorganic Chemistry MCQs with answers covering metals, non-metals, acids, bases, salts, periodic table, chemical compounds, and industrial chemistry—perfect for students and competitive exams.
Inorganic Chemistry is a fundamental branch of chemistry that focuses on the study of elements, metals, non-metals, acids, bases, salts, and their chemical properties and reactions. A solid understanding of inorganic chemistry concepts such as the periodic table, chemical bonding, oxidation and reduction, and industrially important compounds is essential for students and competitive exam aspirants. This article provides 100 carefully designed Inorganic Chemistry MCQs with answers, aimed at strengthening core concepts, supporting quick revision, and improving exam performance. These inorganic chemistry multiple choice questions are ideal for school exams, entrance tests, and general chemistry practice.
⚗️ Inorganic Chemistry – 100 Multiple Choice Questions (MCQs) with Answers
1. Inorganic chemistry mainly deals with:
A. Carbon compounds
B. Living organisms
C. Non-carbon compounds
D. Hydrocarbons
Answer: C
2. Which of the following is an inorganic compound?
A. Methane
B. Ethanol
C. Sodium chloride
D. Glucose
Answer: C
3. Which element is a metal?
A. Oxygen
B. Nitrogen
C. Iron
D. Sulfur
Answer: C
4. Which of the following is a non-metal?
A. Copper
B. Sodium
C. Chlorine
D. Iron
Answer: C
5. Which gas is known as laughing gas?
A. CO₂
B. N₂O
C. NO₂
D. SO₂
Answer: B
6. The chemical symbol of sodium is:
A. So
B. Sd
C. Na
D. S
Answer: C
7. The chemical symbol of potassium is:
A. Po
B. P
C. K
D. Pt
Answer: C
8. Which element has the atomic number 1?
A. Oxygen
B. Helium
C. Hydrogen
D. Nitrogen
Answer: C
9. Which element is a noble gas?
A. Oxygen
B. Nitrogen
C. Neon
D. Hydrogen
Answer: C
10. Noble gases are placed in which group?
A. Group 1
B. Group 13
C. Group 17
D. Group 18
Answer: D
11. Which metal is liquid at room temperature?
A. Iron
B. Mercury
C. Copper
D. Aluminum
Answer: B
12. Which non-metal is liquid at room temperature?
A. Bromine
B. Chlorine
C. Iodine
D. Sulfur
Answer: A
13. Which element is essential for rusting?
A. Nitrogen
B. Carbon dioxide
C. Oxygen
D. Hydrogen
Answer: C
14. Rust is chemically:
A. Iron oxide
B. Iron carbonate
C. Iron chloride
D. Iron sulfate
Answer: A
15. Which gas is released during photosynthesis?
A. Carbon dioxide
B. Oxygen
C. Nitrogen
D. Hydrogen
Answer: B
16. Which acid is present in lemon?
A. Acetic acid
B. Citric acid
C. Hydrochloric acid
D. Sulfuric acid
Answer: B
17. Which acid is present in the stomach?
A. Nitric acid
B. Sulfuric acid
C. Hydrochloric acid
D. Acetic acid
Answer: C
18. Which base is used in soap making?
A. NaOH
B. KCl
C. HCl
D. NH₄Cl
Answer: A
19. Which compound is a base?
A. HCl
B. NaOH
C. H₂SO₄
D. HNO₃
Answer: B
20. Which compound is an acid?
A. NaOH
B. KOH
C. HCl
D. Ca(OH)₂
Answer: C
21. pH value of a neutral solution is:
A. 0
B. 5
C. 7
D. 14
Answer: C
22. A solution with pH less than 7 is:
A. Neutral
B. Basic
C. Acidic
D. Salty
Answer: C
23. A solution with pH more than 7 is:
A. Acidic
B. Neutral
C. Basic
D. Saline
Answer: C
24. Which salt is used in cooking?
A. Sodium chloride
B. Sodium carbonate
C. Calcium carbonate
D. Potassium nitrate
Answer: A
25. Baking soda is:
A. Na₂CO₃
B. NaHCO₃
C. CaCO₃
D. K₂CO₃
Answer: B
26. Washing soda is:
A. NaCl
B. NaHCO₃
C. Na₂CO₃
D. CaCO₃
Answer: C
27. Which compound is used to soften hard water?
A. Baking soda
B. Washing soda
C. Common salt
D. Lime
Answer: B
28. Hardness of water is caused by:
A. Sodium salts
B. Potassium salts
C. Calcium and magnesium salts
D. Iron salts
Answer: C
29. Which metal is most reactive?
A. Iron
B. Copper
C. Sodium
D. Gold
Answer: C
30. Which metal is least reactive?
A. Sodium
B. Iron
C. Copper
D. Gold
Answer: D
31. Which metal is used to make electric wires?
A. Iron
B. Copper
C. Zinc
D. Lead
Answer: B
32. Which metal is used to coat iron to prevent rusting?
A. Copper
B. Aluminum
C. Zinc
D. Silver
Answer: C
33. The process of coating iron with zinc is called:
A. Alloying
B. Electroplating
C. Galvanization
D. Rusting
Answer: C
34. Which metal is extracted from bauxite?
A. Iron
B. Aluminum
C. Copper
D. Zinc
Answer: B
35. Which metal is magnetic?
A. Copper
B. Aluminum
C. Iron
D. Silver
Answer: C
36. Which gas turns limewater milky?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen
Answer: C
37. Which gas is essential for combustion?
A. Hydrogen
B. Nitrogen
C. Oxygen
D. Carbon dioxide
Answer: C
38. Which oxide is acidic?
A. CaO
B. Na₂O
C. CO₂
D. MgO
Answer: C
39. Which oxide is basic?
A. CO₂
B. SO₂
C. Na₂O
D. NO₂
Answer: C
40. Which oxide is neutral?
A. CO
B. CO₂
C. CaO
D. SO₂
Answer: A
41. Which gas is known as producer gas?
A. CO + N₂
B. CO + H₂
C. CO₂ + N₂
D. H₂ + N₂
Answer: A
42. Which gas is used in balloons?
A. Oxygen
B. Nitrogen
C. Hydrogen
D. Carbon dioxide
Answer: C
43. Which gas is used in fire extinguishers?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen
Answer: C
44. Which element is used in nuclear reactors?
A. Uranium
B. Iron
C. Sodium
D. Aluminum
Answer: A
45. Which metal is used in making coins?
A. Sodium
B. Copper
C. Calcium
D. Magnesium
Answer: B
46. Which non-metal is essential for respiration?
A. Nitrogen
B. Oxygen
C. Hydrogen
D. Carbon
Answer: B
47. Which element is used in fertilizers?
A. Nitrogen
B. Gold
C. Silver
D. Mercury
Answer: A
48. Which gas causes acid rain?
A. Oxygen
B. Sulfur dioxide
C. Nitrogen
D. Hydrogen
Answer: B
49. Which compound is used as bleaching agent?
A. Bleaching powder
B. Baking soda
C. Washing soda
D. Lime
Answer: A
50. Bleaching powder is chemically:
A. CaOCl₂
B. CaCl₂
C. CaCO₃
D. NaOCl
Answer: A
51. Which element is used in thermometers?
A. Iron
B. Copper
C. Mercury
D. Silver
Answer: C
52. Which element has the symbol Fe?
A. Fluorine
B. Iron
C. Zinc
D. Lead
Answer: B
53. Which metal reacts vigorously with water?
A. Iron
B. Copper
C. Sodium
D. Gold
Answer: C
54. Which compound is used to make glass?
A. Sodium chloride
B. Silicon dioxide
C. Calcium oxide
D. Magnesium oxide
Answer: B
55. Which element is the most abundant in Earth’s crust?
A. Iron
B. Oxygen
C. Silicon
D. Aluminum
Answer: B
56. Which metal is used in aircraft bodies?
A. Iron
B. Aluminum
C. Copper
D. Zinc
Answer: B
57. Which element is necessary for making steel?
A. Carbon
B. Nitrogen
C. Oxygen
D. Hydrogen
Answer: A
58. Steel is an alloy of:
A. Iron and copper
B. Iron and carbon
C. Copper and zinc
D. Aluminum and magnesium
Answer: B
59. Brass is an alloy of:
A. Copper and zinc
B. Copper and iron
C. Iron and zinc
D. Aluminum and copper
Answer: A
60. Bronze is an alloy of:
A. Copper and zinc
B. Copper and tin
C. Iron and tin
D. Aluminum and copper
Answer: B
61. Which metal is used in making jewelry?
A. Iron
B. Aluminum
C. Gold
D. Sodium
Answer: C
62. Which gas is known as dry ice in solid form?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen
Answer: C
63. Which element is used in making pencils?
A. Silicon
B. Carbon
C. Lead
D. Zinc
Answer: B
64. Which metal is extracted from cinnabar?
A. Zinc
B. Mercury
C. Iron
D. Silver
Answer: B
65. Which metal is used for galvanization?
A. Copper
B. Iron
C. Zinc
D. Aluminum
Answer: C
66. Which gas is responsible for greenhouse effect?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen
Answer: C
67. Which acid is used in car batteries?
A. Hydrochloric acid
B. Nitric acid
C. Sulfuric acid
D. Acetic acid
Answer: C
68. Which element is used in making semiconductors?
A. Silicon
B. Sodium
C. Magnesium
D. Iron
Answer: A
69. Which non-metal is used in matchsticks?
A. Sulfur
B. Carbon
C. Nitrogen
D. Chlorine
Answer: A
70. Which compound is used as an antacid?
A. HCl
B. Mg(OH)₂
C. NaCl
D. H₂SO₄
Answer: B
71. Which metal is present in hemoglobin?
A. Copper
B. Zinc
C. Iron
D. Calcium
Answer: C
72. Which element is essential for bone formation?
A. Iron
B. Calcium
C. Sodium
D. Potassium
Answer: B
73. Which salt is used in photography?
A. NaCl
B. AgBr
C. KCl
D. CaCO₃
Answer: B
74. Which metal is used in electroplating?
A. Gold
B. Silver
C. Chromium
D. All of these
Answer: D
75. Which compound is used to neutralize acidic soil?
A. Calcium carbonate
B. Sodium chloride
C. Potassium nitrate
D. Ammonium chloride
Answer: A
76. Which gas is produced when acids react with metals?
A. Oxygen
B. Nitrogen
C. Hydrogen
D. Carbon dioxide
Answer: C
77. Which metal is used to make cooking utensils?
A. Sodium
B. Aluminum
C. Lead
D. Mercury
Answer: B
78. Which element is essential for photosynthesis?
A. Carbon
B. Oxygen
C. Nitrogen
D. Hydrogen
Answer: A
79. Which compound is used as a drying agent?
A. Calcium chloride
B. Sodium chloride
C. Potassium nitrate
D. Sodium carbonate
Answer: A
80. Which oxide of nitrogen causes brown fumes?
A. NO
B. N₂O
C. NO₂
D. N₂
Answer: C
81. Which element is used in making fertilizers?
A. Nitrogen
B. Carbon
C. Sulfur
D. All of these
Answer: D
82. Which element is used in making electric bulbs?
A. Copper
B. Aluminum
C. Tungsten
D. Iron
Answer: C
83. Which metal is extracted by electrolytic reduction?
A. Iron
B. Copper
C. Aluminum
D. Zinc
Answer: C
84. Which compound is known as quicklime?
A. CaCO₃
B. Ca(OH)₂
C. CaO
D. CaCl₂
Answer: C
85. Which compound is known as slaked lime?
A. CaO
B. CaCO₃
C. Ca(OH)₂
D. CaCl₂
Answer: C
86. Which compound is used for whitewashing?
A. CaO
B. CaCO₃
C. Ca(OH)₂
D. CaCl₂
Answer: C
87. Which metal is used in batteries?
A. Zinc
B. Lead
C. Lithium
D. All of these
Answer: D
88. Which element is radioactive?
A. Uranium
B. Oxygen
C. Carbon
D. Nitrogen
Answer: A
89. Which metal is used in X-ray shielding?
A. Iron
B. Aluminum
C. Lead
D. Copper
Answer: C
90. Which gas has a pungent smell?
A. Oxygen
B. Nitrogen
C. Ammonia
D. Hydrogen
Answer: C
91. Ammonia is chemically:
A. NH₃
B. NH₄
C. NO₂
D. N₂O
Answer: A
92. Which compound is used as refrigerant?
A. Ammonia
B. Oxygen
C. Nitrogen
D. Hydrogen
Answer: A
93. Which element is used in making coins and jewelry?
A. Copper
B. Gold
C. Silver
D. All of these
Answer: D
94. Which element is necessary for blood clotting?
A. Sodium
B. Potassium
C. Calcium
D. Magnesium
Answer: C
95. Which gas is used in welding?
A. Oxygen
B. Nitrogen
C. Acetylene
D. Carbon dioxide
Answer: C
96. Which metal is stored in kerosene?
A. Iron
B. Copper
C. Sodium
D. Aluminum
Answer: C
97. Which element is essential for nerve function?
A. Sodium
B. Calcium
C. Iron
D. Zinc
Answer: A
98. Which compound is used as fungicide?
A. Copper sulfate
B. Sodium chloride
C. Potassium nitrate
D. Calcium carbonate
Answer: A
99. Which element is known as the king of chemicals?
A. Nitric acid
B. Hydrochloric acid
C. Sulfuric acid
D. Acetic acid
Answer: C
100. Inorganic chemistry plays an important role in:
A. Industry
B. Agriculture
C. Medicine
D. All of these
Answer: D
