Related Questions

The solvent used in liquid extraction should not have high latent heat of vaporisation, because
A The pressure drop and hence the pumping cost will be very high
B It cannot be recovered by distillation
C Its recovery cost by distillation may be prohibitatively high
D It will decompose while recovering by distillation
An equipment which converts the latent or sensible heat of one fluid into the latent heat of vaporisation of another, is called a
A Boiler
B Heat exchanger
C Recuperator
D Regenerator
Heat sensitive materials with very high latent heat of vaporisation may be economically separated using
A Liquid extraction
B Distillation
C Evaporation
D Absorption
A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal
A Kinetic energy
B Intermolecular forces of attraction
C Potential energy
D Total energy
If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is
A 30°
B 60°
C 90°
D 120°
When a body of mass 'm' attains a velocity 'v' from rest in time 't', then the kinetic energy of translation is
A mv2
B mgv2
C 0.5 mv2
D 0.5 mgv2
At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant
A Decreases
B Increases
C Remains same
D Depends on other factors
Which of the following is not used for computing latent heat of vaporisation?
A Clausius-Clayperon equation
B Reference substance plots based on Durhing & Othmer plots
C Kistyakowasky's equation
D Hess
The heat of vaporisation __________ with increase in pressure.
A Increases
B Decreases
C Becomes zero at critical pressure
D Both B and C
Rate of heat transfer by vaporisation from pools of water is affected by the
A Nature of heating surface and distribution of bubbles
B Surface tension of water
C Viscosity of water
D All of the above

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