Selected MCQ

Current Question
Which orbital overlap forms a (\pi) bond?
  • A. End-to-end overlap along internuclear axis
  • B. Side-by-side overlap of parallel p orbitals
  • C. Overlap of s with s only
  • D. Overlap of hybrid orbitals only
Correct Answer: B
Explanation:
(\pi) bonds arise from lateral overlap above and below the bond axis.
Related Question 1
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 2
Which process forms soil?
  • A. Weathering
  • B. Fusion
  • C. Respiration
  • D. Photosynthesis
Correct Answer: A
Explanation:
Weathering breaks rocks.
Related Question 3
Which bond involves delocalized electrons?
  • A. Ionic
  • B. Covalent
  • C. Metallic
  • D. Hydrogen
Correct Answer: C
Explanation:
Metallic bonding has electron sea.
Related Question 4
Which structure forms spindle fibers?
  • A. Ribosome
  • B. Centrosome
  • C. Lysosome
  • D. Golgi
Correct Answer: B
Explanation:
Centrosomes organize spindle.
Related Question 5
Which reaction forms ester?
  • A. Hydrolysis
  • B. Esterification
  • C. Oxidation
  • D. Reduction
Correct Answer: B
Explanation:
Acid + alcohol forms ester.