Question

Assertion : $SeC{l}_4$ does not have a tetrahedral structure.
Reason : $Se$ in $SeC{l}_4$ has two lone pairs.

• 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: (C)

$SeC{l}_4$ possesses see-saw geometry, which can be regarded as a distorted trigonal bipyramidal structure, having one lone pair of electrons in the basal position of the trigonal bipyramid. See-saw geometry of $SeC{l}_4$ molecules arises due to the $s{p}^{3}d$ hybridisation of the central atom. The distortion in shape is due to the presence of one lone pair of electrons.