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Mass Transfer

Mass Transfer
An azeotropic mixture is a __________ mixture.

Binary
Constant boiling point
Ternary
None of these

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Mass Transfer
An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively.The humidity of air sample expressed as kg of water vapour/kg of dry air is

0.122
0.048
0.152
0.079

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Mass Transfer
With increase in temperature, the leaching rate increases due to

Increased diffusivity
Both A & B
Neither A nor B
Decreased liquid viscosity

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Mass Transfer
Which of the following decreases during evaporative cooling process with recirculated water supply?

Partial pressure of vapour
None of these
Relative humidity
Wet bulb temperature

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Mass Transfer
Boiling point diagram is

Not affected by pressure
A plot of temperature vs. vapour composition
A plot of temperature vs. liquid composition
Affected by pressure

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Mass Transfer
High pressure at the bottom of a distillation tower handling heat sensitive materials results in

Erosion of the tower
Thermal decomposition of bottoms
Very efficient operation
Increased relative volatility

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