Question

Assertion : All F - S - F angle in `SF_(4)` are greater than `90^(@)` but less than `180^(@)`.
Reason :The lone pair -bond pair repulsion is weaker than bond pair -bond pair repulsion
A. If both assertion and reason are true and the reason is a true explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. if assertion is false but reason is true.

Answer 1

Correct Answer - c
`SiF_(4)` has `sp^(3)` hybridization and shape of regular tetrarhedral where the bond angle of `F - S - F `are found `109.5^(@)` which is greater than `90^(@)` but less than `180^(@)` .Repulsion sequence is `Lp - Lp gt Lp gt Bp gt Bp - Bp ` so assertion is true but the reason is true.