Selected MCQ

Current Question
Which ion has negative charge?
  • A. Cation
  • B. Anion
  • C. Proton
  • D. Neutron
Correct Answer: B
Explanation:
Anions gain electrons.
Related Question 1
Which ion has +2 charge?
  • A. Na⁺
  • B. Ca²⁺
  • C. Cl⁻
  • D. O²⁻
Correct Answer: B
Explanation:
Calcium forms +2 cation.
Related Question 2
Which ion is negative?
  • A. Cation
  • B. Anion
  • C. Proton
  • D. Positron
Correct Answer: B
Explanation:
Anions gain electrons.
Related Question 3
Which force acts on charged particles?
  • A. Gravitational
  • B. Magnetic
  • C. Electric
  • D. Nuclear
Correct Answer: C
Explanation:
Electric force acts on charges.
Related Question 4
A system with negative heat capacity is characteristic of:
  • A. Ideal gas
  • B. Black holes and self-gravitating systems
  • C. Solids
  • D. Liquids
Correct Answer: B
Explanation:
Adding energy can decrease temperature in gravitational systems.
Related Question 5
Which phenomenon proves quantization of charge?
  • A. Photoelectric effect
  • B. Millikan oil drop experiment
  • C. Compton scattering
  • D. Interference
Correct Answer: B
Explanation:
Oil drop experiment measured discrete electron charge.