Reduction of nitroalkanes in netural medius `(e.g. Zn+NH_(3)Cl)` forms mainly:

Reduction of nitrobenzene in the presence of Zn//NH_(4)Cl gives

Reduction of nitrobenzene in the presence of Zn//NH_(4)Cl gives

Use the Standard Reduction Potentials given below to calculate K_(f) for [Zn(NH_(3))_(4)]^(+2) at 25^(@) . Zn^(2+)(aq)+4NH_(3)(aq)ifZn(NH_(3))_(4)^(2+)(aq) [Zn(NH_(3))_(4)]^(+2)+2e^(-)iffZn(s)+4NH_(3)(aq), E^(@)=-1.04V , Zn^(2+)(aq)+2e^(-)iffZn(s), E^(@)=-0.76V

Statement : Dry cells-Leclanche cells are corroded and lose their current producing nature after sometime and do not posses infinite life. Explanation : NH_(3) formed at cathode in dry cell as a result of reduction reacts with Zn container MnO_(2) +NH_(4)^(+) + e rarr MnO(OH) + NH_(3) to form Zn(NH_(3))_(4)^(2+)

In Kjeldahl's method, the amount of standard H_(2)SO_(4) neturalized by NH_(3) is estimated by

Nitrobenzene on reduction with zinc and NH_(4)Cl gives