Question

All $F - S - F$ angle in $SF_4$ is greater than $90^{\circ}$ but less than $180^{\circ}$. The lone pair-bond pair repulsion is weaker than bond pair-bond pair repulsion.

• 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

Answer 1

Answer: (D)

If both assertion and reason are false

Answer 2

$SF _{4}$ has see-saw type structure in which bond angles are different between different $S-F$ atoms. It has non-planar structure. According to VSEPR theory lone pair-lone pair repulsion > lone pair-bond pair repulsion > bond pair-bond pair repulsion.