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: The law of conservation of mass states that:
A) Mass is constant
B) Mass changes in reaction
C) Mass disappears
D) Mass can be created
✅ Correct Answer: A
Explanation: Total mass remains unchanged in chemical reactions.
Q: Which compound contains both ionic and covalent bonds?
A) CO₂
B) H₂O
C) NaCl
D) NH₄Cl
✅ Correct Answer: D
Explanation: NH₄Cl has a covalent ammonium ion and ionic bond with chloride.
Q: An alloy is a mixture of:
A) Metals
B) Elements
C) Non-metals
D) Compounds
✅ Correct Answer: A
Explanation: Alloys are metallic mixtures, like bronze or steel.
Q: The reaction of acid and base produces:
A) Salt and water
B) Salt
C) Water
D) Base only
✅ Correct Answer: A
Explanation: Acid-base reactions yield a salt and water.
Q: Solubility of solids increases with:
A) Stirring
B) Increasing temperature
C) Decreasing temperature
D) No change
✅ Correct Answer: B
Explanation: Most solids dissolve better in warmer solvents.