All gases during throttling process at atmospheric temperature and pressure show a cooling effect except__________________?
(A) CO2
(B) H2
(C) O2
(D) N2
Compressibility factor-reduced pressure plot on reduced co-ordinates facilitates__________________?
(A) Use of only one graph for all gases
(B) Covering of wide range
(C) Easier plotting
(D) More accurate plotting
At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.) ?
(A) μ° + RT ln f
(B) μ°+ R ln f
(C) μ° + T ln f
(D) μ° + R/T ln f
Charles’ law for gases states that__________________?
(A) V/T = Constant
(B) V ∝ 1/T
(C) V ∝ 1/P
(D) PV/T = Constant
The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of _____________ and COP are the same?
(A) Kinematic viscosity
(B) Work
(C) Temperature
(D) None of these
Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of mixture ______________ calorimeter is not used for measuring the dryness fraction of steam?
(A) Bomb
(B) Separating
(C) Bucket
(D) Throttling
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 point at which all the three (solid, liquid and gas) phases co-exist, is known as the ____________ point?
(A) Freezing
(B) Triple
(C) Boiling
(D) Boyle
Which of the following has the least thermal efficiency ?
(A) Steam engine
(B) Carnot engine
(C) Diesel engine
(D) Otto engine
Solubility of a substance which dissolves with an increase in volume and liberation of heat will be favoured by the_______________?
(A) Low pressure and high temperature
(B) Low pressure and low temperature
(C) High pressure and low temperature
(D) High pressure and high temperature