Question

Active metals like magnesium are used to protect other metals such as iron.
Which of the following substances would be more effective in its reducing ability than $Mg\left(s\right)$?

• A. $N{a}^{+}$
• B. $K$
• C. $H^{+}$
• D. $B{r}^{-}$

Answer 1

The correct option is A $N{a}^{+}$

$Sodium$ is above than $Magnesium$ in reactivity order. $Sodium$ displaces $Magnesium$. So, $Sodium$ is more effective in its reducing ability than $Magnesium$.