Temperature above which gases cannot be liquefied is known as:

boiling temperature

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melting temperature

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critical temperature

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all of the above

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Solution

The correct option is C critical temperature
Gases can be converted to liquids by compressing the gas at a suitable temperature.
Gases become more difficult to liquefy as the temperature increases because the kinetic energies of the particles that make up the gas also increase.
The critical temperature of a substance is the temperature at and above which vapor of the substance cannot be liquefied, no matter how much pressure is applied.

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Similar questions

The temperature above which gas cannot be liquefied by application of pressure alone is

State True or False.

A gas above its

T_{c}

or its critical temperature can be liquefied.

Q. Assertion (A): Gases do not liquefy above their critical temperature, even on applying high pressure.
Reason (R): Above critical temperature, the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed.

Gases	$A$	$B$	$C$	$D$
$P_{c} (a t m)$	$2.2$	$14$	$35$	$45$
$T_{c} (K)$	$5.1$	$33$	$127$	$140$

Which of the above gases cannot be liquefied at

100 K

and

50 a t m

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.

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