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Question

Which of the following molecule does not have a plane of symmetry?

A
BF3
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B
H2O
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C
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D
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Solution

The correct option is C
When a molecule is bisected into two equal halves by an imaginary pkane then the molecule is said to possess plane of symmetry.
In the given molecule (a), (b) and (d) have a plane of symmetry because they have a imaginary plane show as a dotted in the below figure which bisect them into two equal halves.
Molecules possess plane of symmetry:
In compound (d), the imaginary plane does not gives a equal halves because in this compound one methyl group comes out of the plane and one goes backside of plane.

Therefore, compound (d) does not possess a plane of symmetry.

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