જ્યારે કોષ સંપૂર્ણ ડિસ્ચાર્જે થાય ત્યારે \(E_{cell} = 0 \) થાય.
\(\therefore \,\,\,{E_{cell}} = \,\,\frac{{0.0592}}{2}\,\,\log \,\,\frac{{[Z{n^{2 + }}]}}{{[C{u^{2 + }}]}}\)
\(\,\,\therefore \,\,\,\frac{{1.10}}{{0.0296}}\,\, = \,\,{\log _{10}}\,\,\frac{{[Z{n^{2 + }}]}}{{[C{u^{2 + }}]}}\)
\([\therefore \,\,37.5\,\, = \,\,{\log _{10}}\,\frac{{[Z{n^{2 + }}]}}{{[C{u^{2 + }}]}}\,\,\,\,\,\therefore \,\,\frac{{[Z{n^{2 + }}]}}{{[C{u^{2 + }}]}}\,\, = \,\,{10^{37.3}}]\)
$Z{n^{2 + }}(aq.) + 2e$ $\rightleftharpoons$ $Zn(s)$; $→$ $-0.762$
$C{r^{3 + }}(aq) + 3e$ $\rightleftharpoons$ $Cr(s)$; $→$ $ -0.740$
$2{H^ + }(aq) + 2e$ $\rightleftharpoons$ ${H_2}(g)$; $→$ $0.00$
$F{e^{3 + }}(aq) + e$ $\rightleftharpoons$ $F{e^{2 + }}(aq)$; $→$ $0.770$
નીચે પૈકી કયું પ્રબળ રીડકશનકર્તા છે?