A. High thermal conductivity
B. Low freezing point
C. Large latent heat of vaporisation
D. High viscosity
Related Mcqs:
- High _____________ is an undesirable property for a good refrigerant?
A. Specific heat
B. Latent heat of vaporisation
C. Viscosity
D. Specific vapor volume - Which of the following is an undesirable characteristic of a refrigerant ?
A. It should be non-explosive
B. It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils
C. Its vapor pressure at the condenser temperature should be very high
D. None of these - Which of the following is not a common refrigerant ?
A. Freon-12
B. Ethylene
C. Ammonia
D. Carbon dioxide - An ideal liquid refrigerant should______________________?
A. Not have a sub-atmospheric vapour pressure at the temperature in the refrigerator coils
B. Not have unduly high vapour pressure at the condenser temperature
C. Both A. and B
D. Have low specific heat - Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor) ?
A. Freon
B. Liquid sulphur dioxide
C. Methyl chloride
D. Ammonia - Which is not a refrigerant ?
A. SO2
B. NH3
C. CCl2F2
D. C2H4Cl2 - Pick out the wrong statement pertaining to the decomposition of PCl5 represented by, PCl5 ⇌ PCl3 + Cl2.Degree of dissociation of PCl5 will_________________?
A. Decrease on addition of Cl2
B. Increase on addition of an inert gas at constant pressure
C. Decrease on increasing the pressure of the system
D. None of these - Pick out the correct equation relating ‘F’ and ‘A’___________________?
A. F = A + PV
B. F = E + A
C. F = A – TS
D. F = A + TS - 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 - Pick out the wrong statement ?
A. Minimum number of degree of freedom of a system is zero
B. Degree of freedom of a system containing a gaseous mixture of helium, carbon dioxide and
hydrogen is 4
C. For a two phase system in equilibrium made up of four non-reacting chemical species, the
number of degrees of freedom is 4
D. Enthalpy and internal energy change is zero during phase change processes like melting,
vaporisation and sublimation
