PVγ = Constant (where, γ = Cp/Cv) is valid for a/an ______________ process?
(A) Isothermal
(B) Isentropic
(C) Isobaric
(D) Adiabatic
The expression for entropy change given by, ΔS = – nR ln (P2/P1), holds good for___________________?
(A) Expansion of a real gas
(B) Reversible isothermal volume change
(C) Heating of an ideal gas
(D) Cooling of a real gas
dW and dq are not the exact differential, because q and W are__________________?
(A) State functions
(B) Path functions
(C) Intensive properties
(D) Extensive properties
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
Fugacity of a component in an ideal gas mixture is equal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at constant pressure and temperature ____________ as its mole fraction increases?
(A) Decreases
(B) Decreases exponentially
(C) Increases
(D) Remain constant
(∂E/∂T)V is the mathematical expression for____________________?
(A) CV
(B) Enthalpy change
(C) Free energy change
(D) None of these
Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor) ?
(A) Freon
(B) Liquid sulphur dioxide
(C) Methyl chloride
(D) Ammonia
A/an ____________ system is exemplified by a vessel containing a volatile liquid in contact with its vapor?
(A) Isolated
(B) Closed
(C) Open
(D) None of these
In case of steady flow compression polytropic process (PVn = constant), the work done on air is the lowest, when_______________?
(A) n = y = 1.4
(B) n = 0
(C) n = 1
(D) n = 1.66
Equilibrium constant decreases as the temperature___________________?
(A) Increases, for an exothermic reaction
(B) Decreases, for an exothermic reaction
(C) Increases, for an endothermic reaction
(D) None of these