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February 2019

The boiling points of pure components of a binary system ________________ with increase in total pressure of the system ?

Mass Transfer /
The boiling points of pure components of a binary system ________________ with increase in total pressure of the system ?

A. Decreases
B. Increases
C. Remains unchanged
D. May increase or decrease, depends on the system

The boiling points of pure components of a binary system ________________ with increase in total pressure of the system ? Read More »

Mass Transfer

The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if___________________?

Mass Transfer /
The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if___________________?

A. NSc = 1
B. NSc = NPr = NLe
C. NPr = NLe
D. NSc = NLe

The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if___________________? Read More »

Mass Transfer

When acetone is added in a two layer mixture of methyl isobutyl ketone and water at 30°C, the acetone distributes between the two layers and the composition of the layer follows two solubility curves. For this system ?

Mass Transfer /
When acetone is added in a two layer mixture of methyl isobutyl ketone and water at 30°C, the acetone distributes between the two layers and the composition of the layer follows two solubility curves. For this system ?

A. As the acetone concentration increases, the solubility curves approach each other
B. Both the phases become identical at a particular common point on both the solubility curves
called the plait point
C. The distribution curve which is a plot between x (acetone concentration in one phase) and y
(acetone concentration in other phase) is analogous to x-y curve used in distillation and
absorption terminates on the x = y diagonal at the concentration of the plait point
D. All A., B. and C.

When acetone is added in a two layer mixture of methyl isobutyl ketone and water at 30°C, the acetone distributes between the two layers and the composition of the layer follows two solubility curves. For this system ? Read More »

Mass Transfer

Pick out the wrong statement. Generally for physical adsorption, a gas of________________?

Mass Transfer /
Pick out the wrong statement. Generally for physical adsorption, a gas of________________?

A. Higher molecular weight is adsorbed in preference to a gas of low molecular weight
B. High critical temperature is adsorbed in preference to a gas of low critical temperature
C. Low volatility is adsorbed in preference to a gas of high volatility
D. None of these

Pick out the wrong statement. Generally for physical adsorption, a gas of________________? Read More »

Mass Transfer

Which of the following processes is followed by unsaturated air (with dry bulb temperature 12°C and relative humidity 47%) passing through water spray washer (temperature of water being constant at 40°C ?

Mass Transfer /
Which of the following processes is followed by unsaturated air (with dry bulb temperature 12°C and relative humidity 47%) passing through water spray washer (temperature of water being constant at 40°C ?

A. Humidification only
B. Heating only
C. Both heating and humidification
D. Evaporative cooling

Which of the following processes is followed by unsaturated air (with dry bulb temperature 12°C and relative humidity 47%) passing through water spray washer (temperature of water being constant at 40°C ? Read More »

Mass Transfer