Question

${}^{\prime }{a}^{\prime }$ and ${}^{\prime }{b}^{\prime }$ are van waals constants for gases, Chlorine is more easily liquefied than ethane because:

• A. $a$ for $C{l}_2$ $<$ $a$ for $C_2{H}_6$ but $b$ for $C{l}_2$ $>$ $b$ for $C_2{H}_6$
• B. $a$ for $C{l}_2$ $>$ $a$ for $C_2{H}_6$ but $C{l}_2$ $<$ $b$ for $C_2{H}_6$
• C. $a$ and $b$ for $C{l}_2>$ $a$ and $b$ for $C_2{H}_6$
• D. $a$ and $b$ for $C{l}_2<$ $a$ and $b$ for $C_2{H}_6$

Answer 1

The correct option is A $a$ for $C{l}_2$ $<$ $a$ for $C_2{H}_6$ but $b$ for $C{l}_2$ $>$ $b$ for $C_2{H}_6$

Only that gas can be liquidity which is not ideal, i.e., real. Lesser the a and larger the $b$ favors for liquefaction.

So, $C{l}_2$ which is having $a$ less and $b$ higher than $C_2{H}_6$ can be easily liquefied.