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

Options

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 and `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

The intermolecular attraction forces between `Cl_(2)` molecules are more than that of between `C_(2)H_(6)` molecules. So `Cl_(2)` is more easily liquefiable .thus .a. for `Cl_(2) gt .a. " for " C_(2)H_(6)`
The volume of a molecule of `C_(2)H_(6)` is more than that of `Cl_(2)` so .b. for `Cl_(2) lt b " for " C_(2)H_(6)`