Selected MCQ

Current Question
Which thermodynamic quantity remains constant in adiabatic process?
  • A. Temperature
  • B. Pressure
  • C. Entropy (reversible case)
  • D. Volume
Correct Answer: C
Explanation:
Reversible adiabatic process is isentropic.
Related Question 1
In thermodynamics, the Helmholtz free energy is minimized at constant:
  • A. Pressure and temperature
  • B. Volume and temperature
  • C. Volume and entropy
  • D. Pressure and entropy
Correct Answer: B
Explanation:
Helmholtz free energy applies to constant T and V systems.
Related Question 2
Which quantity remains invariant under Lorentz transformations?
  • A. Velocity
  • B. Time
  • C. Spacetime interval
  • D. Length
Correct Answer: C
Explanation:
The spacetime interval is invariant in all inertial frames.
Related Question 3
Which thermodynamic potential is minimized at constant temperature and pressure?
  • A. Internal energy
  • B. Helmholtz free energy
  • C. Gibbs free energy
  • D. Enthalpy
Correct Answer: C
Explanation:
Gibbs free energy reaches minimum at equilibrium under constant T and P.
Related Question 4
Which process produces zygote?
  • A. Pollination
  • B. Fertilization
  • C. Germination
  • D. Transpiration
Correct Answer: B
Explanation:
Fusion of gametes forms zygote.
Related Question 5
Which process forms soil?
  • A. Weathering
  • B. Fusion
  • C. Respiration
  • D. Photosynthesis
Correct Answer: A
Explanation:
Weathering breaks rocks.