931. In case of vapor-liquid equilibria, which of the following does not account for gas phase deviation from ideality ?
A. Use of equation of state
B. Fugacity co-efficient
C. Activity co-efficient
D. None of these

932. Which of the following ideal gas laws are not applicable to mixture of gases ?
A. Amagat’s law
B. Dalton’s law
C. Boyle’s law & Charle’s Law
D. None of these

933. Solutions having the same osmotic pressure are called _____________ solutions?
A. Dilute
B. Ideal
C. Isotonic
D. Saturated

934. The molecular velocity of a real gas is proportional to (where, T = absolute temperature of the gas)?
A. √T
B. T
C. T2
D. 1/√T

935. In sub-cooled boiling ?
A. Temperature of the heating surface is less than the boiling point of the liquid
B. Temperature of the heating surface is more than the boiling point of the liquid
C. Bubbles from heating surface are absorbed by the mass of the liquid
D. Very large vapour space is necessary

936. For hot feed, forward feeding as compared to backward feeding results in ______________ economy?
A. Increased
B. Decreased
C. No effect on
D. None of these

937. Which of the following has the lowest Prandtl number ?
A. Molten sodium (a coolant used in fast breeder reactor)
B. Water
C. Transformer oil
D. Dilute H2SO4

938. Fqra cold viscous feed, backward feed gives _____________ than forward feed?
A. A higher capacity
B. A lower capacity
C. Lower economy
D. None of these

939. Which of the following parameters of the fluid is not very important, while deciding its route in a shell and tube heat exchanger ?
A. Corrosiveness & fouling characteristics
B. Pressure
C. Viscosity
D. Density

940. Dropwise condensation is promoted on a/an ______________ surface?
A. Glazed
B. Oily
C. Coated
D. Smoot

NOTE
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