c
\(9. 65\) ampere current was passed for \(1 .0\) hour ( \(3600\)  seconds) Number of moles of electrons passed  \( = \frac{{I(A) \times t(s)}}{{96500}} = \frac{{9.65A \times 3600s}}{{96500}} = 0.36\,moles\)

\({C_6}{H_5}N{O_2}\, + \,4{e^ - } + 4{H^ + } \to \,{\text{p - Aminophenol}} + {H_2}O\)

\(4\) moles of electrons will reduce \(1\) mole of nitrobenzene to \(p-\) aminophenol. \(0.36\) moles of electrons will reduce \(\frac{{0.36}}{4} = 0.09\)  moles of nitrobenzene to \(p-\) aminophenol \(p-\) aminophenol molar mass \(= 109 .14\,\,g/mol\) Mass of \(p-\) aminophenol obtained  \(= 109.14\,g/mol \times  0.09\,mol = 9.81\,g\)