Question

What are hybridisation state of each carbon atom in the following compounds?
Ch2=C=O, CH3CH=CH2,(CH3) 2CO, CH2=CHCN,C6H6

Answer 1

) 



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) C6H6 

All the 6 carbon atoms in benzene are sp2 hybridised. 

Answer 2

as you know, Hybridisation depends upon the number of sigma bond formed by the atom. if an atom formed number of sigma bond = 2 then, atom will be sp Hybridized. if an atom formed number of sigma bond = 3 then, atom will be sp² hybridized. and if an atom formed number of sigma bond = 4 then, atom will be sp³ hybridized .

see attachment here hybridisation of each C-atom is given.