Question
The standard electrode potential $\mathrm{(M^{3+}/M^{2+})}$ for V, Cr, Mn & Co are $-$0.26 V, $-$0.41 V, + 1.57 V and + 1.97 V, respectively. The metal ions which can liberate $\mathrm{H_2}$ from a dilute acid are :
The standard electrode potential $\mathrm{(M^{3+}/M^{2+})}$ for V, Cr, Mn & Co are $-$0.26 V, $-$0.41 V, + 1.57 V and + 1.97 V, respectively. The metal ions which can liberate $\mathrm{H_2}$ from a dilute acid are :