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 a strong acid?
A) Hydrochloric acid
B) Acetic acid
C) Citric acid
D) Carbonic acid
✅ Correct Answer: A
Explanation: HCl is a strong acid that fully ionizes in water.
Q: Chlorophyll contains which metal ion?
A) Copper
B) Magnesium
C) Iron
D) Zinc
✅ Correct Answer: B
Explanation: Magnesium is at the center of the chlorophyll molecule.
Q: The chemical formula of calcium carbonate is?
A) CaO
B) Ca(OH)₂
C) CaCO₃
D) CaCl₂
✅ Correct Answer: C
Explanation: Calcium carbonate is CaCO₃ and is found in limestone and marble.
Q: Which gas is used to fill balloons?
A) Nitrogen
B) Oxygen
C) Hydrogen
D) Helium
✅ Correct Answer: D
Explanation: Helium is non-flammable and lighter than air, making it ideal for balloons.
Q: Alcohols are characterized by which functional group?
A) –CHO
B) –COOH
C) –NH₂
D) –OH
✅ Correct Answer: D
Explanation: Alcohols contain the hydroxyl (–OH) functional group.