a and b are van der Waals constants for gases | vedclass

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(D) The value of $a$ is a measure of the magnitude of the attractive forces between the molecules of the gas. Greater the value of $a$,larger is the a

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$a$ for $Cl_2 > a$ for $C_2H_6$ but $b$ for $Cl_2 < b$ for $C_2H_6$

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(D) The value of $a$ is a measure of the magnitude of the attractive forces between the molecules of the gas. Greater the value of $a$,larger is the attractive inter-molecular force between the gas molecules.The value of $b$ is related to the effective size of the gas molecules. It is also termed as excluded volume.The gases with higher value of $a$ and lower value of $b$ are more liquefiable. Since $Cl_2$ is more easily liquefied than $C_2H_6$,$a$ for $Cl_2$ must be greater than $a$ for $C_2H_6$,and $b$ for $Cl_2$ must be less than $b$ for $C_2H_6$.

$a$ and $b$ are van der Waals constants for gases. Chlorine is more easily liquefied than ethane because

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