Liquification of gaseous substances whose critical temperatures are below room temperature requires ____.

High pressure and lowering of temperature (below $T_{C}$ ).

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Low pressure and raising of temperature (above $T_{C}$ ).

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High pressure and raising of temperature (above $T_{C}$ ).

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Low pressure and lowering of temperature (below $T_{C}$ ).

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Solution

The correct option is A
High pressure and lowering of temperature (below $T_{C}$ ).

Liquification of gaseous substances whose critical temperatures are below room temperature requires high pressure and its temperature should be below the critical temperature.The temperature beyond T_c do not yield satisfactory results.

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Similar questions

Liquification of gaseous substances whose critical temperatures are below room temperature requires ____.

Consider the following statements.

I. Gaseous substances whose critical temperatures are above room temperatures can be liquefied by applying sufficient pressure to the gas.

II. Gaseous substances whose critical temperatures are below room temperature can be liquefied by the application of pressure and lowering of temperature below $T_{c}$ .

Select the correct alternate.

Consider the following statements.

I. Gaseous substances whose critical temperatures are above room temperatures can be liquefied by applying sufficient pressure to the gas.

II. Gaseous substances whose critical temperatures are below room temperature can be liquefied by the application of pressure and lowering of temperature below $T_{c}$ .

Select the correct alternate.

Q. Assertion :A gas can be easily liquefied at any temperature below its critical temperature. Reason: Liquification of a gas takes place when the average kinetic energy of the molecules is low.

Q. Given are the values of their van der Waal's constant 'a'. Arrange the following gases in the order of their expected liquification pressure at a temperature T. T is below the critical point of all the gases.
Gas

C H_{4}

K r

N_{2}

C l_{2}

'a'(

a t m L^{2} . m o l^{- 1}

) 2.283 2.439 1.408 6.579

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