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AIIMS 2004
Exam
AIIMS
Year
2004
Subject
Chemistry
Chapter
Chemical Bonding and Molecular Structure

AIIMS 2004 · Chemistry · Chemical Bonding and Molecular Structure

Assertion : All F-S-F angle in SF_4 is greater than 90^ but less...

Assertion : All F−S−F\mathrm{F}-\mathrm{S}-\mathrm{F} angle in SF4\mathrm{SF}_4 is greater than 90∘90^{\circ} but less than 180∘180^{\circ}. Reason : The lone pair-bond pair repulsion is weaker than bond pair-bond pair repulsion.

Options

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

Correct answer

C. If assertion is true but reason is false

Step-by-step solution

Due to greater lone pair - bond pair repulsions than bond pair - bond pair repulsions, the F−S−FF-S-F bond angle decreases from 180∘180^{\circ}.
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