4161. Throttling process is a/an __________ process.
A. Reversible and isothermal
B. Irreversible and constant enthalpy
C. Reversible and constant entropy
D. Reversible and constant enthalpy
✅ The correct answer is option B.
Chemical Engineering
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4162. Which of the following is not a unit of the equilibrium constant Kp? (where, Δx = number of moles of products number of moles of reactants)
A. (atm)Δx, when Δx is negative
B. (atm)Δx, when Δx is positive
C. Dimensionless, when Δx = 0
D. (atm)Δx2, when Δx > 0
✅ The correct answer is option D.
4163. In the equation, PVn = constant, if the value of n = 1, then it represents a reversible __________ process.
A. Isothermal
B. Isobaric
C. Polytropic
D. Adiabatic
✅ The correct answer is option A.
4164. Specific volume of an ideal gas is
A. Equal to its density
B. The reciprocal of its density
C. Proportional to pressure
D. None of these
✅ The correct answer is option B.
4165. Pick out the correct equation relating ‘F’ and ‘A’.
A. F = A + PV
B. F = E + A
C. F = A – TS
D. F = A + TS
✅ The correct answer is option A.
4166. The internal energy of a gas obeying P (V – b) RT (where, b is a positive constant and has a constant Cv), depends upon its
A. Pressure
B. Volume
C. Temperature
D. All of the above
✅ The correct answer is option C.
4167. The chemical potential of any constituent of an ideal solution depends on the __________ of the solution.
A. Temperature
B. Pressure
C. Composition
D. All of the above
✅ The correct answer is option D.
4168. A reasonably general expression for vapour-liquid phase equilibrium at low to moderate pressure is Φi yi P = Yi xi fi° where, Φ is a vapor fugacity component, Yi is the liquid activity co-efficient and fi° is the fugacity of the pure component i. the Ki value (Yi = Ki xi) is therefore, in general a function of
A. Temperature only
B. Temperature and pressure only
C. Temperature, pressure and liquid composition xi only
D. Temperature, pressure, liquid composition xi and vapour composition yi
✅ The correct answer is option C.
4169. For a constant volume process __________ by the system is used only to increase the internal energy.
A. Heat absorbed
B. Work done
C. Both A & B
D. Neither A nor B
✅ The correct answer is option A.
4170. Out of the following refrigeration cycles, which one has maximum COP?
A. Air cycle
B. Carnot cycle
C. Ordinary vapor compression cycle
D. Vapor compression with a reversible expansion engine
✅ The correct answer is option B.