Selected MCQ

Current Question
Which force holds electrons in orbit?
  • A. Nuclear
  • B. Magnetic
  • C. Electrostatic
  • D. Gravitational
Correct Answer: C
Explanation:
Coulomb attraction binds electrons.
Related Question 1
Which force holds nucleus together?
  • A. Gravitational
  • B. Strong nuclear
  • C. Weak
  • D. Electric
Correct Answer: B
Explanation:
Strong force binds nucleons.
Related Question 2
Which bond involves delocalized electrons?
  • A. Ionic
  • B. Covalent
  • C. Metallic
  • D. Hydrogen
Correct Answer: C
Explanation:
Metallic bonding has electron sea.
Related Question 3
In molecular orbital theory, antibonding orbitals have:
  • A. Lower energy
  • B. Higher energy
  • C. Same energy
  • D. Zero energy
Correct Answer: B
Explanation:
Antibonding orbitals destabilize molecule.
Related Question 4
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 5
Which reaction releases electrons?
  • A. Reduction
  • B. Oxidation
  • C. Neutralization
  • D. Precipitation
Correct Answer: B
Explanation:
Oxidation is loss of electrons.