The reduction potential $H^{+}\mathrm{\mid }{H}_2\mathrm{\mid }PtH^+|H\_2|Pt$ in 1M NaOH solution at ${25}^{\circ }C25^\backslash circ\; C$ will be about

The pressure of $H_{2}H\_2$ required to make the potential of the hydrogen electrode in water equal to zero

On diluting the concentration of mercurous chloride ten times, the change in potential of mercuric to mercurous at 298 K is

The cell potential of$Ag\mathrm{\mid }AgBr(s)\mathrm{\mid }HBr(0.02M)\mathrm{\mid }{H}_2(0.5atm)\mathrm{\mid }PtAg|AgBr(s)|HBr(0.02M)|H\_2(0.5\backslash ,atm)|Pt$ (Given$E_{Br\mathrm{\mid }AgBr\mathrm{\mid }Ag}^0=0.071VE\_\{Br|AgBr|Ag\}^0=0.071\backslash ,V$ ) is

The standard reduction potentials of $C{u}^{2+}\mathrm{\mid }CuCu^\{2+\}|Cu$ and $C{u}^{2+}\mathrm{\mid }C{u}^{+}Cu^\{2+\}|Cu^+$ are 0.337V and 0.153V, respectively. The standard electrode potential of $C{u}^{2+}\mathrm{\mid }CuCu^\{2+\}|\; Cu$ half cell is

In acid medium, the standard reduction potential of $NONO$ converted to $N_{2}ON\_2O$ is 1.59V. Its standard potential in alkaline medium would be

At ${25}^{\circ }C,E^{\circ }25^\backslash circ\; C,E^\backslash circ$ for the reaction $C{u}^{2+}+Sn(s)⟶Cu(s)+S{n}^{2+}Cu^\{2+\}+Sn(s)\backslash longrightarrow\; Cu(s)+Sn^\{2+\}$ is 0.48 V, the standard equilibrium constant for the reaction is

The ionic product of water at 298 K is ${10}^{-14}{M}^{2}10^\{-14\}\; M^2$. The standard emf of the cell producing the reaction $H^{+}(aq)+O{H}^{-}(aq)⟶H_{2}O(I)H^+(aq)+OH^-(aq)\backslash longrightarrow\; H\_2O(I)$ will be

In the daniel cell, anode is:

Which of the metals listed in the options is the least reactive?