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In Ethan-1-al, the carbon of methyl group is the alpha-carbon since the functional group -CHO is directly bonded to it. But in formaldehyde( Methanal ) there is no alpha-carbon. Hence, it doesn't possess an alpha-hydrogen.
2 5 2
Because, there is no carbon attached to CHO. if there is no carbon attached to a functional group then no alpha hydrogen!!
Yes. :-)
hm...thanks again
You're welcome, again :-)