1.

Select the types of redox reaction form the following on the basis of type of tedox changes: (a) intermolecular redox, (b) intramolecular redox (c) auto redox. If none, write none. (i) `C_(6)H_(5) CHO overset(NaOH)(rarr) C_(6)H_(5)CH_(2) OH + C_(6) H_(5) COONa` (iI) `Cr_(2)O_(7)^(2-) + 2OH^(-) rarr 2CrO_(4)^(2-) + H_(2)O` (iii) `2Mn_(2)O_(7) rarr 4MnO_(2) + 3O_(2)` (iv) `NO_(3)^(-) + H_(2)S + H_(2)O + H^(+) rarr NH_(4)^(+) + HSO_(4)^(+-)` (v) `Fe + N_(2) H_(4) rarr NH_(3) + Fe(OH)_(2)` (vi) `2KOH + Br_92) rarr KBr + KBrO` (vii) `2Cu^(+) rarr Cu + Cu^(2+)` (viii) `Ag(NH_(3))_(2)^(+) overset(2H^(+))(rarr) Ag^(+) + 2NH_(4)^(+)` (ix) `5KI + KIO_(3) + 6HCl rarr 3I_(2) + 6KCI + 3H_(2)O`

Answer» Correct Answer - (a) `(iv),(v),(ix)`, (b) `(iii)`, (c) `(i),(vi),(vii)`


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