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What are hybridisation states of each carbon atom in the following compounds? 

CH2=C=O, 

CH3CH=CH2

(CH3)2CO, 

CH2=CHCN, 

C6H6

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(i) 

C–1 is sp2 hybridised. 

C–2 is sp hybridised. 

(ii) 

C–1 is sp3 hybridised. 

C–2 is sp2 hybridised. 

C–3 is sp2 hybridised. 

(iii) 

C–1 and C–3 are sp3 hybridised. 

C–2 is sp2 hybridised. 

(iv) 

C–1 is sp2 hybridised. 

C–2 is sp2 hybridised. 

C–3 is sp hybridised. 

(v) C6H

All the 6 carbon atoms in benzene are sp2 hybridised. 

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