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Question

Hybridisation of carbon atom in CO23 is


A

sp

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B

sp2

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C

sp3

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D

None of these

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Solution

The correct option is B

sp2


The carbonate ion, CO23 , is coplanar (bond angle: 120) and is considered to be a reasonance hybrid of the following canonical forms

In resonance hybrid of CO23 ion, the three carbon-oxygen bonds are having the same bond length which means that each bond has one-third double bond character.
The carbon atom is CO23 ion in sp2 hybridised due to which the bond angle is 120.


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