A leach solution contains Ag^+, Cu^2+ and Fe^2+ ions, each at 1 M. Use E deg values (V): Ag+/Ag +0.80; Cu^2+/Cu +0.34; Fe^2+/Fe -0.44; Zn^2+/Zn -0.76. Select the correct statement(s) about adding the metals indicated.

Excess copper turnings displace Ag^+ but leave Fe^2+ in solution

Iron turnings displace both Ag^+ and Cu^2+

Silver metal displaces Cu^2+ from the solution

Excess copper turnings displace Ag^+ but leave Fe^2+ in solution

Excess zinc dust leaves the Fe^2+ ions unreduced

Iron turnings displace both Ag^+ and Cu^2+

JEE Advanced levelOne or more correct optionsDifficulty 3 of 3mt047

A leach solution contains $Ag X^{+}$ , $Cu X^{2 +}$ and $Fe X^{2 +}$ ions, each at $1 M$ . Use $E^{\circ}$ values (V): $Ag X^{+} / Ag$ $+ 0.80$ ; $Cu X^{2 +} / Cu$ $+ 0.34$ ; $Fe X^{2 +} / Fe$ $- 0.44$ ; $Zn X^{2 +} / Zn$ $- 0.76$ . Select the correct statement(s) about adding the metals indicated.

A metal displaces the ions of any metal with a more positive

E^{\circ}

. Cu (

+ 0.34

) is below Ag (

+ 0.80

) but above Fe (

- 0.44

), so it displaces silver but not iron (true). Silver cannot displace Cu2+ (false). Iron displaces both Ag+ and Cu2+ (true). Zinc (

- 0.76

) is more reducing than iron, so it also reduces Fe2+ (statement 4 false).