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

Options

A. a and b for `Cl_(2) gt` a and b for `C_(2)H_(6)`
B. a and b for`Cl_(2)` lt a and b for `C_(2)H_(6)`
C. a for `Cl_(2) lt a` for `C_(2)H_(6)` but b for `Cl_(2) gt b` for `C_(2)H_(6)`
D. a for `Cl_(2) gt a for `C_(2)H_(6)` but b for `Cl_(2) lt b` for `C_(2)H_(6)`

Answer

D

Explanation

Van der Waals. constant .a. is a measure of intermolecular forces of attraction and b is a measure of size of gas molecules. Larger the intermolecular forces of attraction and smaller the size of molecules, more will be the ease of liquefaction.