Biomolecules Question 89

Question: A compound of mol. wt. 180 is acetylated to give a compound of mol. wt. 390. The number of amino groups in the initial compound is

[KCET 1996]

Options:

A) 2

B) 4

C) 5

D) 6

Show Answer

Answer:

Correct Answer: C

Solution:

Difference in mass of compound = 390 - 180 = 210 wt. of $ CH_3CO $ - group is = 43

Therefore no. of $ -NH_2 $ group = $ \frac{210}{43}=4.88=5 $ .