Question

Assertion : $PbI_4$ is a stable compound.
Reason : Iodide stabilizes higher oxidation state

• A. If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
• B. If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
• C. If the Assertion is correct but Reason is incorrect
• D. If both the Assertion and Reason are incorrect
• E. If the Assertion is incorrect but the Reason is correct.

Answer 1

Answer: (D)

Due to screening effect, down the group, lower oxidation states become more stable. e.g., $Pb(II)$ is more stable than $Pb(IV)$. But small, highly electronegative elements like $F$ atoms can somewhat stabilise its higher oxidation state.