Question

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

• A. $a$ and $b$ for $Cl _{2} >a$ and $b$ for $C _{2} H _{6}$
• B. $a$ and $b$ for $Cl _{2}< a$ and $b$ for $C _{2} H _{6}$
• C. $a$ for $Cl _{2} >a$ for $C _{2} H _{6}$ but $b$ for $Cl _{2} >b$ for $C _{2} H _{6}$
• D. $a$ for $Cl _{2} >a$ for $C _{2} H _{6}$ but $b$ for $Cl _{2}< b$ for $C _{2} H _{6}$

Answer 1

Answer: (D)

' $a$ ' for $Cl _{2} >a$ for $C _{2} H _{6}$ but $b$ for $Cl _{2}< b$ for $C _{2} H _{6}$. Since, there is stronger intermolecular interaction present in $Cl _{2}$, it is more easily liquefied.