A compound containing alcohol with the molecular formula 
is converted by the action of acetyl chloride into a compound with molecular mass 
. The original compound has
group Text Solution
Verified by ExpertsD
During the reaction of compound containing an -OH group (such as alcohol) with acetyl chloride, the hydrogen atom (of 
group) is replaced by an acetyl group 
. This results is net increase in molecular mass by 42 units.
Thus, number of 
groups should be equal to the total increase in molecular mass divided by 42 .
Molecular mass of compound before acetylation 
Molecular mass of compound after acetylation 
No. of 
groups 
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