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A compound with molecular mass 180 is ac...

A compound with molecular mass 180 is acylated with `CH_(3)COCl` to get a compound with molecular mass 390. the number of amino groups present per molecule of the former compound is

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The correct Answer is:
5
`R-NH_2+ClCOCH_3 rarr R NHCOCH_2 + HCl`
The increase in mass per acetyl group = 42 amu
Total increase in mass = 390 – 180 = 210
`therefore` The number fo acetyl groups added ` = (210)/(42) = 5`.
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