\(\mathrm{E}_{\mathrm{Fe}^{+2} / \mathrm{Fe}}^{0}=-0.76 \mathrm{V}\)
\(Zn\) has higher negative \(SRP\) (Standard reduction potential) so it works as anode and protect iron to make iron as cathode.
$298\,K$ પર જ્યારે $\frac{\left[M^*(a q)\right]}{\left[M^{3 *}(a q)\right]}=10^a$ હોય ત્યારે આપેલ કોષ નો $E_{\text {cell }}$ એ $0.1115\,V$ છે. $a$ નું મૂલ્ય $............$ છે.આપેલ : $E _{ M }^\theta{ }^{3+} M ^{+}=0.2\,V$
$\frac{2.303\,R T}{F}=0.059\,V$