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NCERT Class XI Chemistry Organic Chemistry Some basic principles and Techniques Solutions

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What are hybridisation states of each carbon atom in the following compounds?
CH2=C=O\mathrm{CH_2=C=O} , CH3CH=CH2\mathrm{CH_3CH = CH_2} , (CH3)2CO\mathrm{(CH_3)_2CO} , CH2\mathrm{CH_2} = CHCN , C6H6\mathrm{C_6H_6}
Solution:  
The hybridisation of the carbon atoms in the given compounds are indicated below:
(i) CH2sp2=Csp=O\underset{sp^2}{\mathrm{CH_2}}=\underset{sp}{\mathrm{C}}=\mathrm{O}
(ii) CH3sp3−CHsp2=CH2sp2\underset{sp^3}{\mathrm{CH_3}}-\underset{sp^2}{\mathrm{CH}}=\underset{sp^2}{\mathrm{CH_2}}
(iii)
(iv) CH2sp2=CH2sp2−Csp≡N\underset{sp^2}{\mathrm{CH_2}}=\underset{sp^2}{\mathrm{CH_2}}-\underset{sp}{\mathrm{C}}\equiv \mathrm{N}
(v)
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