For real gases, van der Waal's equation is written as [p + (an^(2))/(V^(2))] (V - b) = nRT where a and b are van der Waal's constant. Two sets of gases are (I) O_(2), CO_(2), H_(2) " and " He (II) CH_(4), O_(2), H_(2). The gases given in set I in increasing order of b and gases given in set II in decreasing order of a are arranged below. Select the correct order from the following :

For real gases, van der Waal's equation is written as [p + (an^(2))/(V

1.	For real gases, van der Waal's equation is written as [p + (an^(2))/(V^(2))] (V - b) = nRT where a and b are van der Waal's constant. Two sets of gases are (I) O_(2), CO_(2), H_(2) " and " He (II) CH_(4), O_(2), H_(2). The gases given in set I in increasing order of b and gases given in set II in decreasing order of a are arranged below. Select the correct order from the following :
Answer» (I)` He lt H_(2) lt CO_92) lt O_(2)` (II) `CH_(4) gt H_(2) gt O_(2)` (I) `O_(2) lt He lt H_(2) lt CO_(2)` (II) `H_(2) gt O_(2) gt CH_(4)` (I) `H_(2) lt He lt O_(2) lt CO_(2)` (II) `CH_(4) gt O_(2) gt H_(2)` (I) `H_(2) lt O_(2) lt He lt CO_(2)` (II) `O_(2) gt CH_(4) gt H_(2)` SOLUTION :`a prop` intermolecular attractive forces `b prop` EFFECTIVE size of the molecules `:.` order should be (I) `H_(2), lt He lt O_(2) lr CO_(2)`, (II) `CH_(4) gt O_(2) gt H_(2)`