$\frac{{4.5}}{9} = $ eq of ${H_2}$ $2{H^ + } + 2{e^ - } \to {H_2}$ eq. of ${H_2}$ =
Number of moles $× n$ factor $0.5 = \,{n_{{H_2}}} \times 2$
${V_{{H_2}}} = \frac{{0.5}}{2} \times 22.4$; ${V_{{H_2}}} = 5.6\;L$
$Pt/ M/M^{3+}(0.001 \,mol\, L^{ -1})/Ag^+(0.01\, mol\, L^{-1})/Ag$
$298\, K$ પર સેલનો $emf$ $0.421\, volt$ હોવાનું જાણવા મળ્યું છે. $298\, K$ પર અર્ધ પ્રક્રિયા $M^{3+} + 3e \to M$ નો પ્રમાણિત પોટેન્શિયલ ......... $\mathrm{volt}$ હશે .
(આપેલ છે: $298\, K$ પર $E_{A{g^ + }/Ag}^o \,=\, 0.80\, Volt$ )
$[\Lambda_{\mathrm{H}^{+}}^{\circ}=350 \,\mathrm{~S}\, \mathrm{~cm}^{2}\, \mathrm{~mol}^{-1},\Lambda_{\mathrm{CH}_{3} \mathrm{COO}^{-}}^{\circ}=50\, \mathrm{~S}\, \mathrm{~cm}^{2}\, \mathrm{~mol}^{-1}]$
$Zn | Zn ^{2+}(0.1\, M ) \| Ag ^{+}(0.01 \,M )| Ag$
[આપેલ $: E_{Z n^{+2}/Z_{n}}^{0}=-0.76 \,V ; E _{A g^{+} / A_{ g }}^{0}=+0.80 \,V ; \frac{2.303 RT }{ F }=0.059$]