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

Answer»

a for `Cl_(2) LT a ` for `C_(2) H_(6)` but b for `Cl_(2) gt b` for `C_(2) H_(6)`
a for `Cl_(2) gt a ` for `C_(2) H_(6)` but b for `Cl_(2) lt b` for `C_(2) H_(6)`
a and b for `Cl_(2) gt a` and b for `C_(2) H_(6)`
a and b for `Cl_(2) lt a ` and b for `C_(2) H_(6)`

Solution :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 ATTRACTIONS and smaller the size of molecules, more will be the ease of liquefication.


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