MASS TRANSFER QUIZ

Which of the following is not fixed by the process requirements, in the design of absorbers?

None of these

Flow rate of the entering gas

Composition of the entering liquid

Terminal concentrations of gas stream

TRUE ANSWER : ?
YOUR ANSWER : ?

Boiling point diagram is not affected by the ambient

Both B and C

Humidity

Temperature

Pressure

TRUE ANSWER : ?
YOUR ANSWER : ?

At minimum reflux ratio for a given separation

Separation is most efficient

Minimum number of the theoretical plates is required

Number of plates is zero

Number of plates is infinity

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Benzene-toluene

Ethyl alcohol-water

Hydrochloric acid-water

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Separation of two or more components of a liquid solution can not be achieved by

Fractional crystallisation

Evaporation

Liquid extraction

Absorption

TRUE ANSWER : ?
YOUR ANSWER : ?

For contacting a highly soluble gas with a liquid

Both of the options given here

Bubble the gas through liquid

None of the listed here

Spray the liquid on gas stream

TRUE ANSWER : ?
YOUR ANSWER : ?

Raschig ring made of procelain cannot be used for treating concentrated

Nitric acid

Sulphuric acid

Alkalis

Hydrochloric acid

TRUE ANSWER : ?
YOUR ANSWER : ?

Flooding results in

High tray efficiency

Good contact between the fluids

Low tray efficiency

High gas velocity

TRUE ANSWER : ?
YOUR ANSWER : ?

In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.

Smaller than

Either A, or B ; depends on the type of packing

Equal to

Greater than

TRUE ANSWER : ?
YOUR ANSWER : ?

The operation involved when the soluble material is largely on the surface of an insoluble solid and is merely washed off by the solvent is called

Decoction

None of these

Elutriation or elution

Percolation

TRUE ANSWER : ?
YOUR ANSWER : ?

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