Pick out the undesirable property for a good refrigerant ?
(A) High thermal conductivity
(B) Low freezing point
(C) Large latent heat of vaporisation
(D) High viscosity
Filling of gas from a high pressure cylinder into small bottles is an example of a/an ______________ process?
(A) Equilibrium
(B) Adiabatic
(C) Steady
(D) Unsteady
If we increase the pressure on a substance (which is at its triple point), then the triple point __________________?
(A) Increases
(B) Decreases
(C) Remains unchanged
(D) May increase or decrease; depends on the substance
Heating of water under atmospheric pressure is an ______________ process?
(A) Isochoric
(B) Isobaric
(C) Adiabatic
(D) Isothermal
Pick out the wrong statement ?
(A) At constant pressure, solubility of a gas in a liquid diminishes with rise in temperature
(B) Normally, the gases which are easily liquefied are more soluble in common solvents
(C) The gases which are capable of forming ions in aqueous solution are much more soluble in water than in other solvents
(D) At constant pressure, solubility of a gas in a liquid increases with rise in temperature
In a homogeneous solution, the activity co-efficient of a component depends upon the_________________?
(A) Pressure
(B) Composition
(C) Temperature
(D) All (A),
The main feature of Carnot refrigeration cycle is that, it________________________?
(A) Does not need the addition of external work for its functioning
(B) Transfers heat from high temperature to low temperature
(C) Accomplishes the reverse effect of the heat engine
(D) None of these
Which of the following processes cannot be made reversible even under ideal condition of operation ?
(A) Free expansion of a gas
(B) Compression of air in a compressor
(C) Expansion of steam in a turbine
(D) All (A),
Trouton’s ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K) ___________________?
(A) λb/Tb
(B) Tb/λb
(C) √(λb/Tb)
(D) √(Tb/λb)
The enthalpy change when ammonia gas is dissolved in water is called the heat of___________________?
(A) Solution
(B) Formation
(C) Dilution
(D) Combustion