1. Tardigrade
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  3. Chemistry
  4. A compound with molecular mass 180 is acylated with CH3COCl 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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Q. A compound with molecular mass $180$ is acylated with $CH_3COCl$ to get a compound with molecular mass $390$. The number of amino groups present per molecule of the former compound is

JEE MainJEE Main 2013Amines

Solution:

Since each - $COCH_3$ group displace one H atom in the reaction molecular mass increases with 42 unit.
Since the mass increases by (390 - 180) = 210, hence the number of - $NH_2$ group is $=\frac{210}{42}=5$.

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