Discussion Forum



1)

 A compound with molecular mass 180 is acylated with CH3 COCl to get a compound with molecular mass 390. The number of amino groups presents per molecule of the former compound is 


A) 2

B) 5

C) 4

D) 6

Answer:

Option C

Explanation:

242021688_p15.JPG

since each -COCH3 group displace one H atom in the reaction of one mole of 

242021990_p16.JPG  with one -NH2  group the molecular mass increases with 42 unit. Since the mass increases by (390-180)=210

hence the number of -NH2   group is 210/42=5