Question

If the standard reduction potential $E^{\circ}$ for four divalent elements $X, Y, Z, W$ are $-1.46 \,V ,-0.36 \,V , 0.15 \,V$ and $-1.24\, V$ respectively then

• A. $X$ will replace $Z ^{2+}$ from aqueous solution
• B. $Y$ will replace $Z ^{2+}$ from aqueous solution
• C. Wwill replace $Z ^{2+}$ from aqueous solution
• D. All statements are correct.

Answer 1

Answer: (D)

S.R.P or oxidising power $\frac{Z>Y>W>X}{\text { Reactivity } \downarrow}$ [S.R.P $\uparrow=$ Reactivity $\downarrow]$