\({C_6}{H_5}N{O_2}\, + \,4{e^ - } + 4{H^ + } \to \,{\text{p - Aminophenol}} + {H_2}O\)
\(4\) 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 \(= 109.14\,g/mol \times 0.09\,mol = 9.81\,g\)
$M{g^{2 + }} + 2{e^ - } \to Mg(s);\,\,E = - 2.37\,V$
$C{u^{2 + }} + 2{e^ - } \to Cu(s);\,\,\,E = + 0.33\,V$

$I$. $\log \,\,K\, = \,\frac{{nF{E^o}}}{{2.303\,RT}}$
$II$. $K\, = \,{e^{\frac{{nF{E^o}}}{{RT}}}}$
$III$. $\log \,\,K\, = -\,\frac{{nF{E^o}}}{{2.303\,RT}}$
$IV$. $\log \,\,K\, = 0.4342\,\,\frac{{-nF{E^o}}}{{RT}}$
સાચું વિધાન $(s)$ પસંદ કરો
$A$. $\mathrm{Fe}$ $B$. $\mathrm{Mn}$ $C$. $\mathrm{Ni}$ $D$. $\mathrm{Cr}$ $E$. $\mathrm{Cd}$
Choose the correct answer from the options given below:
${Zn}\left|{Zn}^{2+}({aq}),(1 {M}) \| {Fe}^{3+}({aq}), {Fe}^{2+}({aq})\right| {Pt}({s})$
કોષ પોટેન્શિયલ $1.500\, {~V}$ પર ${Fe}^{3+}$ આયન તરીકે હાજર કુલ આયનનો અપૂર્ણાંક, ${X} \times 10^{-2}$ છે. $X$ નું મૂલ્ય $.....$ (નજીકના પૂર્ણાંકમાં) છે.
$\left(\right.$ આપેલ છે: $\left.E_{{Fe}^{3+} / {Fe}^{2+}}^{0}=0.77\, {~V}, {E}_{{Zn}^{2+} / {Zn}}^{0}=-0.76 \,{~V}\right)$