P-Block Elements Ques 333
Question: Which one has the highest percentage of nitrogen
[KCET 1991; CBSE PMT 1993; AIIMS 1996, MP PET 2001; RPET 2003]
Options:
A) Urea
B) Ammonium sulphate
C) Ammonium nitrate
D) Calcium nitrate
Show Answer
Answer:
Correct Answer: A
Solution:
$ NH_2CONH_2 $ % of N = $ \frac{\text{Mass of }N}{\text{Mass of compound}}\times 100 $ = $ \frac{28}{60}\times 100 $ = 46%.
