Q.

Compressibility factor (Z=PVnRT) is plotted against pressure:

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What is the correct order of ease of liquefiability of the gases shown in the above graph

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a

H2<CH4<N2<CO2

b

CO2<CH4<N2<H2

c

H2<N2<CH4<CO2

d

CH4<H2<N2<CO2

answer is A.

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Detailed Solution

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Lesser is the value of Z at low pressure, easy will be liquefaction of the gas. Z < 1, shows the domination of attractive forces. 

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