The decreasing order of stability of the carbonium ions C_(6)H_(5)CH_(2)^(+) (I), p-(CH_(3)O)C_(6)H_(4)CH_(2)^(+) (II), p-(NO_(2))C_(6)H_(4)CH_(2)^(+) (III), p-(CH_(3))C_(6)H_(4)CH_(2)^(+) (IV) is

The decreasing order of stability of the carbonium ions C_(6)H_(5)CH_

1.	The decreasing order of stability of the carbonium ions C_(6)H_(5)CH_(2)^(+) (I), p-(CH_(3)O)C_(6)H_(4)CH_(2)^(+) (II), p-(NO_(2))C_(6)H_(4)CH_(2)^(+) (III), p-(CH_(3))C_(6)H_(4)CH_(2)^(+) (IV) is
Answer» `IV gt II gt I gt III` `II gt IV gt III gt I` `II gt IV gt I gt III` `IV gt II gt III gt I` SOLUTION :Electron-donating groups `(OCH_(3) gt CH_(3))` increases while electron-withdrawing groups `(NO_(2))` decreases the stability of substituted carbonium IONS. Thus,option (C) is correct.