When pressure is applied on the system, ice ↔ water, then_________________?
(A) Equilibrium cannot be established
(B) More ice will be formed
(C) More water will be formed
(D) Evaporation of water will take place
In an irreversible process________________?
(A) Tds = dE – dW = 0
(B) dE – dW – Tds = 0
(C) Tds – dE + dW < 0
(D) Tds – dT + dW < 0
The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (C.O.P.) of a Carnot heat pump operating between T1 and T2 is given by__________________?
(A) T1/(T1-T2)
(B) T2/(T1-T2)
(C) T1/T2
(D) T2/R1
An ideal gas is taken around the cycle ABCA as shown in P-V diagram below: The work done by the gas during the cycle is equal to_________________?
(A) 12 P1V1
(B) 6 P1 V1
(C) 3 P1V1
(D) P1 V1
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 expression, nCv(T2 – T1), is for the _____________ of an ideal gas?
(A) Work done under adiabatic condition
(B) Co-efficient of thermal expansion
(C) Compressibility
(D) None of these
Which of the following has the minimum value of COP for a given refrigeration effect ?
(A) Reverse Carnot cycle
(B) Ordinary vapour-compression cycle
(C) Vapour-compression process with a reversible expansion engine
(D) Air refrigeration cycle
Partial molar free energy of an element A in solution is same as its__________________?
(A) Chemical potential
(B) Activity
(C) Fugacity
(D) Activity co-efficient
Entropy of the system decreases, when_______________?
(A) Snow melts into water
(B) A gas expands spontaneously from high pressure to low pressure
(C) Water is converted into ice
(D) Both
A gas shows deviation from ideal behaviour at______________?
(A) Low pressure and high temperature
(B) Low pressure and low temperature
(C) Low temperature and high pressure
(D) High temperature and high pressure