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AIIMS 2003
Exam
AIIMS
Year
2003
Subject
Chemistry
Chapter
p Block Elements (Group 15, 16, 17 & 18)

AIIMS 2003 · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

Assertion : PbI_4 is a stable compound. Reason: Iodide stabilizes...

Assertion : PbI4\mathrm{PbI}_4 is a stable compound. Reason: Iodide stabilizes higher oxidation state.

Options

  1. AIf both assertion and reason are true and the reason is the correct explanation of the assertion
  2. BIf both assertion and reason are true and the reason is not the correct explanation of the assertion
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false.

Correct answer

D. If both assertion and reason are false.

Step-by-step solution

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