Chemical Engineering · all questions

Mass Transfer
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Q601

The-relative volatility for separation of a non-ideal binary mixture by distillation should be

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Q602

Sodium bicarbonate is produced during soda ash manufacture using a __________ tower.

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Q603

In which of the following unit operations, the selectivity is an important parameter?

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Q604

Pick out the correct relationship. (where, R_i = internal reflux ratio R_o = external reflux ratio)

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Q605

A liquid mixture contains 30% o-xylene, 60% p-xylene and 10%. m-xylene (all percentages in w/w). Which of the following statements would be true in respect of this mixture?

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Q606

When the feed to a distillation column is a saturated liquid, slope of the feed line is

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Q607

When the psychometric ratio is __________ then the adiabatic saturation temperature and wet bulb temperature becomes equal.

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Q608

Can a cooling tower cool water below the wet bulb temperature of inlet air?

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Q609

Raoult's law is applicable to the

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Q610

Pick out the system with minimum boiling azeotrope at 1 atm.

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Q611

Pick out the system with maximum boiling azeotrope at 1 atm.

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Q612

Leaching of uranium ore and gold ore is done in

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Q613

Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (y_in = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is: N + 2 = 6 log

(\frac{y _{in}}{y _{out}}) .

For 98% recovery of acetone, the number of trays required is/are

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Q614

The fixed cost of a distillation column at minimum reflux ratio is

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Q615

The operating cost of a distillation column at minimum reflux ratio is

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Q616

Drying operation under vacuum is carried out to

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Q617

Unit of molal diffusivity is

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Q618

__________ temperature is the steady state temperature attained by a small amount of liquid evaporating into a large quantity of unsaturated gas-vapor mixture.

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Q619

In a counter-current liquid extractor

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Q620

Equilibrium-moisture curves of different solids

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