Selected MCQ

Current Question
Which process increases entropy most?
  • A. Freezing water
  • B. Mixing gases
  • C. Crystallization
  • D. Condensation
Correct Answer: B
Explanation:
Mixing increases randomness.
Related Question 1
Which process increases entropy?
  • A. Freezing
  • B. Condensation
  • C. Mixing gases
  • D. Crystallization
Correct Answer: C
Explanation:
Mixing increases disorder.
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
The entropy change for a reversible process is given by:
  • A. (dS = \delta Q)
  • B. (dS = \delta Q/T)
  • C. (dS = TdQ)
  • D. (dS = Q/T^2)
Correct Answer: B
Explanation:
Entropy change equals heat transfer divided by temperature in reversible processes.
Related Question 4
Which process most directly forms soil horizons over long timescales?
  • A. Instantaneous melting
  • B. Weathering combined with organic accumulation and leaching
  • C. Oceanic spreading
  • D. Lunar tidal forcing
Correct Answer: B
Explanation:
Soil profiles develop from parent material alteration plus biological and hydrologic processes.
Related Question 5
Which process produces zygote?
  • A. Pollination
  • B. Fertilization
  • C. Germination
  • D. Transpiration
Correct Answer: B
Explanation:
Fusion of gametes forms zygote.