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: Electrons orbit the nucleus and carry what type of charge?
A) Negative
B) Neutral
C) No charge
D) Positive
✅ Correct Answer: A
Explanation: Electrons are negatively charged particles found outside the nucleus.
Q: Carbon belongs to which group in the periodic table?
A) Group 14
B) Group 1
C) Group 2
D) Group 18
✅ Correct Answer: A
Explanation: Carbon is placed in Group 14 due to its 4 valence electrons.
Q: Metals typically react with acids to produce which gas?
A) Oxygen
B) Hydrogen
C) Chlorine
D) Carbon dioxide
✅ Correct Answer: B
Explanation: Hydrogen gas is released when most metals react with dilute acids.
Q: The formula H₂O stands for how many atoms?
A) 1
B) 3
C) 4
D) 2
✅ Correct Answer: B
Explanation: H₂O contains two hydrogen atoms and one oxygen atom, making a total of three.
Q: A substance with a pH of 2 is considered to be:
A) Strong acid
B) Neutral
C) Weak acid
D) Weak base
✅ Correct Answer: A
Explanation: A pH of 2 indicates a high concentration of hydrogen ions, hence a strong acid.