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Question: Answered & Verified by Expert
Assertion : All $\mathrm{F}-\mathrm{S}-\mathrm{F}$ angle in $\mathrm{SF}_4$ is greater than $90^{\circ}$ but less than $180^{\circ}$.
Reason : The lone pair-bond pair repulsion is weaker than bond pair-bond pair repulsion.
ChemistryChemical Bonding and Molecular StructureAIIMSAIIMS 2004
Options:
  • A If both assertion and reason are true and reason is the correct explanation of assertion
  • B If both assertion and reason are true but reason is not the correct explanation of assertion
  • C If assertion is true but reason is false
  • D If both assertion and reason are false.
Solution:
2515 Upvotes Verified Answer
The correct answer is: If assertion is true but reason is false
Due to greater lone pair - bond pair repulsions than bond pair - bond pair repulsions, the $F-S-F$ bond angle decreases from $180^{\circ}$.

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