Trouton's ratio of __________ liquids is calculated using Kistyakowsky equation.

__________ equation applies to diffusivities in liquids.

A

Gilliland

B

Hirschfelder

C

Wilke and Chang

D

None of these

At __________ reflux, theoretical number of plates in a distillation coloumn is calculated using Fenske-Underwood equation.

A

Operating

B

Total

C

Minimum

D

Maximum permissible

A can contains a mixture of two liquids A and B is the ratio 7 : 5. When 9 litres of mixture are drawn off and the can is filled with B, the ratio of A and B becomes 7 : 9. How many litres of liquid A was contained by the can initially?

A

10

B

20

C

21

D

25

A can contains a mixture of two liquids A and B in the ratio 7:5. When 9 liters of mixtures are drawn off and the can is filled with B, the ratio of A and B becomes 7:9. How many liters of liquid A was contained by the can initially?

A

10

B

20

C

21

D

25

The Euler's equation for the motion of liquids is based upon the assumption that

A

The fluid is non - viscous, homogeneous and incompressible

B

The velocity of flow is uniform over the section

C

The flow is continuous, steady and along the stream line

D

All of the above

Euler's equation in the differential form for the motion of liquids is given by

A

$$\frac{{{\text{dp}}}}{\rho } + {\text{gdz}} + {\text{vdv}} = 0$$

B

$$\frac{{{\text{dp}}}}{\rho } - {\text{gdz}} + {\text{vdv}} = 0$$

C

$$\rho {\text{dp}} + {\text{gdz}} + {\text{vdv}} = 0$$

D

$$\rho {\text{dp}} - {\text{gdz}} + {\text{vdv}} = 0$$

Which of the following forced convection heat transfer equation accounts for the liquid viscosity effect for viscous liquids?

A

Dittus-Boeltier equation

B

Sieder-Tate equation

C

Nusselt equation

D

None of these

Variation of vapor pressure with temperature can be calculated using Clausius-Clapeyron equation, which assumes that the

A

Vapor follows the ideal gas law

B

Molal latent heat of vaporisation is constant within the limited temperature range

C

Volume in the liquid state is negligible compared with that in the vapor state

D

All of the above

Small pressure differences in liquids is measured using a/an

A

U-tube manometer

B

Inclined tube manometer

C

Pitot tube

D

None of these

If an ideal solution is formed by mixing two pure liquids in any proportion, then the __________ of mixing is zero.

A

Enthalpy

B

Volume

C

Both A & B

D

Neither A nor B

Trouton's ratio of __________ liquids is calculated using Kistyakowsky equation.

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