341. As the temperature is lowered towards the absolute zero, the value of ∂(ΔF)/∂T, then approaches
A. Unity
B. Zero
C. That of the heat of reaction
D. Infinity
✅ The correct answer is option B.
Thermodynamics MCQs
342. A gas mixture of three components is brought in contact with a dispersion of an organic phase in water. The degree of freedom of the system are
A. 4
B. 3
C. 5
D. 6
✅ The correct answer is option B.
343. The unit of fugacity is the same as that of the
A. Pressure
B. Temperature
C. Volume
D. Molar concentration
✅ The correct answer is option A.
344. Cv for an ideal gas
A. Does not depend upon temperature
B. Is independent of pressure only
C. Is independent of volume only
D. Is independent of both pressure and volume
✅ The correct answer is option D.
345. The heat capacities for the ideal gas state depend upon the
A. Pressure
B. Temperature
C. Both A & B
D. Neither A nor B
✅ The correct answer is option B.
346. For an incompressible fluid, the __________ is a function of both pressure as well as temperature.
A. Internal energy
B. Enthalpy
C. Entropy
D. All of the above
✅ The correct answer is option B.
347. Activity co-efficient is a measure of the
A. Departure from ideal solution behaviour
B. Departure of gas phase from idea] gas law
C. Vapour pressure of liquid
D. None of these
✅ The correct answer is option A.
348. The amount of heat required to decompose a compound into its elements is __________ the heat of formation of that compound from its elements.
A. Less than
B. More than
C. Same as
D. Not related to
✅ The correct answer is option C.
349. For multicomponent multiple phases to be in equilibrium at the same pressure and temperature, the __________ of each component must be same in all phases.
A. Chemical potential
B. Fugacity
C. Both A and B
D. Neither A nor B
✅ The correct answer is option C.
350. Fugacity is most helpful in
A. Representing actual behaviour of real gases
B. Representing actual behaviour of ideal gases
C. The study of chemical equilibria involving gases at atmospheric pressure
D. None of these
✅ The correct answer is option A.