Question

Which of the following statement is true with respect to inert-pair effect?

• A. $Sn^{2 +}$ is oxidising agent while $Pb^{4 +}$ is reducing agent
• B. $Sn^{2 +}$ and $Pb^{4 +}$ are both oxidising agent and reducing agent
• C. $Sn^{2 +}$ is reducing agent while $Pb^{2 +}$ is oxidising agent
• D. $Sn^{2 +}$ is reducing agent while $Pb^{4 +}$ is oxidising agent

Answer 1

Answer: (D)

Due to inert-pair effect,stability of +2 oxidation state increases down the group in carbon family.

$\text{Sn}^{2 +} \rightarrow \text{unstable[good reducing agent]}$ $\text{Pb}^{4 +} \rightarrow \text{unstable[good oxdising agent]}$