Which of the following metals cannot displace $H_2$ from acids or $H_2O$ from its compounds?

For the reaction $M^{+n}_{(aq)} + ne^{-} \rightarrow M_{(s)}$,if the standard reduction potentials of elements $M_1, M_2$,and $M_3$ are $-0.34 \ V$,$-3.05 \ V$,and $-1.66 \ V$ respectively,what is the order of their reducing strength?

Identify the reaction from the following that occupies the top position in the $EMF$ series (standard reduction potential) at $298 \; K$.

Which of the following elements has the highest and lowest standard electrode potential $(E^{\circ}_{red})$ values in the electrochemical series?

If the reduction potential is more,then

Reduction of species is dependent on its reduction potential value.