AIIMS 2018 Chemistry VSEPR Theory MCQ Question
Assertion : Geometry of molecule can be termed as distorted tetrahedron, a folded square or see saw. Reason : Four fluorine atoms surround or form bond with sulphur atom.
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.
Correct Answer
Detailed Explanation
Option B is correct because it accurately represents the molecular geometry of SF₄, which is a seesaw shape due to the presence of one lone pair of electrons on the sulfur atom. This lone pair occupies an equatorial position in the trigonal bipyramidal arrangement, leading to the distortion in bond angles and the resulting seesaw geometry. Option A, if it depicts a different structure, likely suggests a tetrahedral or square planar arrangement, which does not account for the lone pair and thus misrepresents the actual molecular shape of SF₄.
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