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Question

Among the following compounds, the one that is polar and has the central atom with sp2 hybridization is:

A
H2CO3
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B
SiF4
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C
BF3
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D
HClO2
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Solution

The correct option is A H2CO3
(a)H2CO3 Polar compound.
No.of Bond pair1×2+4+6×38=2+4+188=248=3SP2 Hybridisation.
(b) SiF4 Non Polar
No.of Bond pair4+7×48=4+288=328=4SP3 Hybridisation.
(c) BF3 Non Polar
No.of Bond pair3+7×38=3+218=248=3SP2 Hybridisation.
(d) HClO2 Non Polar
No.of Bond pair1+7+6×28=208=2,42=2SP3 Hybridisation.
Our requirement of SP2 hybridisation and center atom begin polar.

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