401. Translational kinetic energy of molecules of an ideal gas is proportional to (where, T = absolute temperature of the gas )
A. T
B. √T
C. T²
D. 1/√T
✅ The correct answer is option A.
Thermodynamics MCQs
402. The work done in an adiabatic change in a particular gas depends upon changes in the __________ only.
A. Temperature
B. Specific heat
C. Volume
D. Pressure
✅ The correct answer is option A.
403. A system is said to be isopiestic, if there is no __________ change.
A. Temperature
B. Pressure
C. Volume
D. None of these
✅ The correct answer is option B.
404. The four properties of a system viz. P, V, T, S are related by __________ equation.
A. Gibbs-Duhem
B. Gibbs-Helmholtz
C. Maxwell’s
D. None of these
✅ The correct answer is option C.
405. Heating of water under atmospheric pressure is an __________ process.
A. Isochoric
B. Isobaric
C. Adiabatic
D. Isothermal
✅ The correct answer is option B.
406. Gibbs free energy per mole for a pure substance is equal to the
A. Latent heat of vaporisation
B. Chemical potential
C. Molal boiling point
D. Heat capacity
✅ The correct answer is option B.
407. Enthalpy changes over a constant pressure path are always zero for __________ gas.
A. Any
B. A perfect
C. An easily liquefiable
D. A real
✅ The correct answer is option B.
408. __________ decreases during adiabatic throttling of a perfect gas.
A. Entropy
B. Temperature
C. Enthalpy
D. Pressure
✅ The correct answer is option D.
409. The equation Tds = dE – PdV applies to
A. Single phase fluid of varying composition
B. Single phase fluid of constant composition
C. Open as well as closed systems
D. Both B and C
✅ The correct answer is option D.
410. __________ calorimeter is normally used for measuring the dryness fraction of steam, when it is very low.
A. Bucket
B. Throttling
C. Separating
D. A combination of separating & throttling
✅ The correct answer is option D.