Selected MCQ

Current Question
The entropy at absolute zero for perfect crystal is:
  • A. Maximum
  • B. Infinite
  • C. Zero
  • D. Undefined
Correct Answer: C
Explanation:
Third law states entropy approaches zero.
Related Question 1
In a Fermi gas at absolute zero, particles occupy:
  • A. Random energy levels
  • B. Only highest energy level
  • C. All states up to Fermi energy
  • D. Only ground state
Correct Answer: C
Explanation:
Fermions fill all states up to the Fermi level due to Pauli exclusion.
Related Question 2
Which law defines entropy change in irreversible processes?
  • A. First law
  • B. Second law
  • C. Third law
  • D. Zeroth law
Correct Answer: B
Explanation:
Entropy increases in irreversible processes.
Related Question 3
Which process increases entropy most?
  • A. Freezing water
  • B. Mixing gases
  • C. Crystallization
  • D. Condensation
Correct Answer: B
Explanation:
Mixing increases randomness.
Related Question 4
Which complex exhibits highest crystal field splitting?
  • A. Tetrahedral
  • B. Octahedral
  • C. Square planar
  • D. Linear
Correct Answer: C
Explanation:
Square planar has largest splitting in many cases.
Related Question 5
Which process increases entropy?
  • A. Freezing
  • B. Condensation
  • C. Mixing gases
  • D. Crystallization
Correct Answer: C
Explanation:
Mixing increases disorder.