(i) `underset("Propene")(CH_(3)-CH=CH_(2)) underset((ii) 3H_(2)O_(2)//OH^(-))overset((i) B_(2)H_(6))(rarr) underset("Propan-1-ol")(CH_(3)-CH_(2)-CH_(2)OH)`
(ii) `underset("Phenol")(C_(6)H_(5)-OH) overset(Br_(2) (aq))(rarr) underset("Tribromophenol")(C_(6)H_(2)(Br_(3))OH)`
(iii) `underset("Ethanol")(CH_(3)-CH_(2)-OH) overset(Cu//573 K)(rarr) underset("Ethene")(CH_(2)=CH_(2))`