Chemistry MCQs
Chemistry MCQs cover organic, inorganic, physical, analytical, and biochemistry topics. Perfect for FSc, BSc, CSS, PMS, NTS, and competitive exams, they enhance concept mastery, analytical skills, speed, and accuracy for academic and job test success.
Q: Which of the following is an endothermic process?
A) Deposition
B) Freezing
C) Boiling
D) Condensation
✅ Correct Answer: C
Explanation: Boiling absorbs heat, making it endothermic.
Q: Allotropes are forms of elements with?
A) Same atoms but different structure
B) Same charges
C) Same compounds
D) Different numbers of neutrons
✅ Correct Answer: A
Explanation: Allotropes are structurally different forms of the same element, like graphite and diamond.
Q: Which compound is used in baking powder?
A) Sodium bicarbonate
B) Calcium carbonate
C) Magnesium hydroxide
D) Ammonium nitrate
✅ Correct Answer: A
Explanation: NaHCO₃ releases CO₂ on heating or reacting with acid.
Q: Organic chemistry is the study of compounds containing?
A) Carbon
B) Gases
C) Water
D) Metals
✅ Correct Answer: A
Explanation: Organic compounds are carbon-based.
Q: Which metal is stored in oil to prevent reaction with air?
A) Iron
B) Silver
C) Copper
D) Sodium
✅ Correct Answer: D
Explanation: Sodium is highly reactive with air and moisture.