A. Ideal
B. Real
C. Isotonic
D. None of these
✅ The correct answer is option A.
Thermodynamics MCQs
442. A solute distributes itself between two non-miscible solvents in contact with each other in such a way that, at a constant temperature, the ratio of its concentrations in two layers is constant, irrespective of its total amount”. This is
A. The distribution law
B. Followed from Margule’s equation
C. A corollary of Henry’s law
D. None of these
✅ The correct answer is option A.
443. Which of the following is not an intensive property?
A. Chemical potential
B. Surface tension
C. Heat capacity
D. None of these
✅ The correct answer is option C.
444. Melting of ice exemplifies a/an
A. Adiabatic process
B. Endothermic reaction
C. Exothermic reaction
D. Process involving a chemical reaction
✅ The correct answer is option B.
445. After throttling, gas temperature
A. Decreases
B. Increases
C. Remains same
D. May increase or decrease ; depends on the nature of the gas
✅ The correct answer is option A.
446. At normal boiling point, molar entropy of vaporisation is __________ Joule/K°.mole.
A. 72
B. 92
C. 142
D. 192
✅ The correct answer is option B.
447. If different processes are used to bring about the same chemical reaction, the enthalpy change is same for all of them. This is __________ law.
A. Hess’s
B. Kirchoff’s
C. Lavoisier and Laplace
D. None of these
✅ The correct answer is option A.
448. Reduced pressure of a gas is the ratio of its
A. Pressure to critical pressure
B. Critical pressure to pressure
C. Pressure to pseudocritical pressure
D. Pseudocritical pressure to pressure
✅ The correct answer is option A.
449. The compressibility factor for an ideal gas is 1. Its value for any other real gas is
A. 1
B. < 1
C. > 1
D. Either (b) or (c), depends on the nature of the gas
✅ The correct answer is option D.
450. The adiabatic throttling process of a perfect gas is one of constant enthalpy
A. In which there is a temperature drop
B. Which is exemplified by a non-steady flow expansion
C. Which can be performed in a pipe with a constriction
D. In which there is an increase in temperature
✅ The correct answer is option C.