1.

The correct order of increasing basic nature of the following bases is A. `(ii) lt (v) lt (i) lt (iii) lt (iv)`B. `(v) lt (ii) lt (i) lt (iii) lt (iv)`C. `(ii) lt (v) lt (i) lt (iv) lt (iii)`D. `(v) lt (ii) lt (i) lt (iv) lt (iii)`

Answer» Correct Answer - A
Presence of electron-withdrawing (-I or -M group) like `-NO_(2)` at p-position willdecrease the basicity, so (ii) will be the least basic, whereas presence of electron-donating (+I or +M) group like `-OCH_(3)` at p-position in (iv) will increase the basicity so (iv) will be the most basic. Hence correct order of increasing basic character is `(ii) lt (v) lt (i) lt (iii) lt (iv)`.


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