JEE Advanced 2019 Chemistry question

Each of the following options contains a set of four molecules. Identify the option(s) where all four molecules possess permanent dipole moment at room temperature.

(A), , ,
(B), , , Correct
(C), , ,
(D), , , Correct

Answer: (B),(D)

Solution

(A) (linear), (linear) and (trigonal planar) are symmetric and non-polar: rejected. (B) (bent), (pyramidal), (tetrahedral with unlike bonds) and

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Question ID VK-026834