Which of the following reactions does not involve change in hybridisation ?
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a
Protonation at oxygen of CH2O
b
Hydride ion addition at carbon of CH2O
c
Dissociation of C - Cl bond of CH3Cl
d
Hydrogenation of ethene
answer is A.
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Detailed Solution
1)Protonation means addition of proton [H+].2)In above case Sp2 hybridisaed carbon changes to Sp3 hybridised carbon.3) hybridisation changes from Sp3 to Sp2.4)hybridisation changes from Sp2 to Sp3 during protonation no change in hybridisation of carbon atom.