Favourable conditions for the liquefaction of gases in general are

The principle applied in liquefaction of gases is

A

Adiabatic expansion

B

Joule-Thomson effect

C

Both A and B

D

Neither A nor B

Claude's liquefaction process employs the cooling of gases by

A

Expansion in an engine

B

Following a constant pressure cycle

C

Throttling

D

None of these

Liquefaction of gases can not be done by

A

Exchange of heat with colder stream

B

Adiabatic expansion through a throttle valve (Joule-Thomson expansion)

C

Merely compressing it beyond critical pressure

D

Adiabatic expansion against a piston or in a turbine

Linde gas liquefaction process employs cooling

A

By throttling

B

By expansion in an engine

C

At constant pressure

D

None of these

Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.

A

-83

B

-183

C

-196

D

-218

Claude gas liquefaction process employs cooling

A

At constant pressure

B

By throttling

C

By expansion in an engine

D

None of these

Claude process of gas liquefaction employs

A

Merely compression of gas beyond its critical pressure

B

Joule-Thomson expansion cooling

C

Heat exchange with colder stream

D

Adiabatic expansion against a piston or in a turbine

Linde process of gas liquefaction employs

A

Exchange of heat with colder stream

B

Adiabatic expansion through a throttle valve (Joule-Thomson expansion)

C

Adiabatic expansion against a piston or in a turbine

D

Merely compressing the gas beyond its critical pressure

Which of the following set of conditions is favourable for the maximum yield of ammonia by Haber's process?

A

High pressure, low reactants concentration, high temperature

B

High pressure, low reactants concentration, low temperature

C

High pressure, high reactants concentration, low temperature

D

Low pressure, high reactants concentration, low temperature

Which one of the following conditions are not favourable for the growth of coral reefs ?

A

Sediment free water

B

Fresh water

C

Moderate saline water

D

Disturbed water and currents

Favourable conditions for the liquefaction of gases in general are

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