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
Degree of freedom of the system ice-water-vapour will be:
A. 0
B. 1
C. 2
D. 3
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
In a homogeneous solution, the activity co-efficient of a component depends upon the:
A. Pressure
B. Composition
C. Temperature
D. All (A), B. and (C)
For an ideal liquid solution, which of the following is unity:
A. Activity
B. Fugacity
C. Activity co-efficient
D. Fugacity co-efficient
Internal energy is equal to the heat absorbed in case of a/an _____ process:
A. Constant volume
B. Polytropic
C. Adiabatic
D. Constant pressure
The expression for entropy change, ΔS = n Cp . ln (T2/T1), is valid for the _____ of a substance:
A. Simultaneous pressure & temperature change
B. Heating
C. Cooling
D. Both B. and C
Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is:
A. 1
B. 2
C. 3
D. 4
