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%.



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