In which of the following reaction equilibrium, the value of equilibrium constant Kp will be more than is Kc ?
(A) 2HI ⇌ H2 + I2
(B) N2O4 ⇌ 2NO2
(C) 2SO2 + O2 ⇌ 2SO3
(D) None of these
The partial pressure of each constituent present in an alloy is _____________ the total vapor pressure exerted by the alloy?
(A) Less than
(B) Equal to
(C) More than
(D) Either
In any spontaneous process, ?
(A) Only F decreases
(B) Only A decreases
(C) Both F and A decreases
(D) Both F and A increase
The change in Gibbs free energy for vaporisation of a pure substance is___________________?
(A) Positive
(B) Negative
(C) Zero
(D) May be positive or negative
Answer: Option B 392. Keeping the pressure constant, to double the volume of a given mass of an ideal gas at 27°C, the temperature should be raised to _____________ °C?
(A) 270
(B) 327
(C) 300
(D) 540
Free energy___________________?
(A) Decreases in all spontaneous (or irreversible) processes
(B) Change during a spontaneous process has a negative value
(C) Remains unchanged in reversible processes carried at constant temperature and pressure
(D) All A,
For an irreversible process involving only pressure-volume work____________________?
(A) (dF)T, p <0
(B) (dF)T, p = 0
(C) (dF)T, p > 0
(D) (dA)T, v >0
Out of the following refrigeration cycles, which one has the minimum COP (Co-efficient of performance) ?
(A) Air cycle
(B) Carnot cycle
(C) Ordinary vapour compression cycle
(D) Vapour compression with a reversible expansion engine
With increase in temperature, the atomic heat capacities of all solid elements_________________?
(A) Increases
(B) Decreases
(C) Remains unchanged
(D) Decreases linearly
Heat is added at constant pressure in an ideal _____________ cycle?
(A) Stirling
(B) Brayton
(C) Rankine
(D) Both