Assertion: All F - S - F angle in SF4 is greater than 90° but less than 180°. Reason: The lone pair-bond pair repulsion is weaker than bond pair-bond pair repulsion.

Question

Assertion: All F - S - F angle in SF4 is 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 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

Tardigrade Admin · Accepted Answer

SF 4 has see-saw type structure in which bond angles are different between different S-F atoms. It has non-planar structure. <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/d1fd6a4ed65cfb06c24083db8a74fbb7-.png" /> According to VSEPR theory lone pair-lone pair repulsion > lone pair-bond pair repulsion > bond pair-bond pair repulsion.

Q. Assertion : All $F - S - F$ angle in $S F_{4}$ is greater than $9 0^{\circ}$ but less than $18 0^{\circ}$ .
Reason : The lone pair-bond pair repulsion is weaker than bond pair-bond pair repulsion.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

$S F_{4}$ 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.

Q. Assertion : All F−S−F angle in SF4​ is greater than 90∘ but less than 180∘. Reason : The lone pair-bond pair repulsion is weaker than bond pair-bond pair repulsion.