Question
Question: A compound with molecular mass 180 is acylated with CH3COCl to get a compound with molecular mass 39...
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 :
A
2
B
5
C
4
D
6
Answer
5
Explanation
Solution
By reaction with one mole of 
with one –NH2 group the molecular mass increases with 42 unit. Since the mass increases by (390 – 180) = 210 hence the number of –NH2 groups is 5.
