Question

Which one of the following metals could not be obtained on electrolysis of aqueous solution of its salts?

• A. $\rightarrow$
• B. $\Delta º_{eq} = \Delta º_{c} + \Delta º_{a}$
• C. $\Delta_{m} = \frac{k}{C}$
• D. $\alpha\frac{\Delta_{m}}{\Delta º_{m}}$

Answer 1

Answer: (B)

$\Delta º_{eq} = \Delta º_{c} + \Delta º_{a}$

Answer 2

The reduction potential of $Mg$is less than that of water $(E^{o} = - 0.83V)$. Hence their ions in the aqueous solution cannot be reduced instead water will be reduced.

$2H_{2}O + 2e^{-} \rightarrow H_{2} + 2OH^{-}$.