Selected MCQ

Current Question
Which bond has partial ionic character?
  • A. Nonpolar covalent
  • B. Polar covalent
  • C. Metallic
  • D. Hydrogen
Correct Answer: B
Explanation:
Polar covalent bonds share electrons unequally.
Related Question 1
Which bond involves delocalized electrons?
  • A. Ionic
  • B. Covalent
  • C. Metallic
  • D. Hydrogen
Correct Answer: C
Explanation:
Metallic bonding has electron sea.
Related Question 2
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 3
Which bond is metallic?
  • A. Electron sharing
  • B. Electron transfer
  • C. Electron sea
  • D. Hydrogen bonding
Correct Answer: C
Explanation:
Metallic bonding involves delocalized electrons.
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 bond is weakest?
  • A. Covalent
  • B. Ionic
  • C. Hydrogen
  • D. Metallic
Correct Answer: C
Explanation:
Hydrogen bonds are weaker.