Discussion
The substance that contains the maximum amount of nitrogen is ?
Answer: A
Urea has the highest nitrogen content, about 46 per cent.
\(\mathrm{NH_2CONH_2}\) has a molar mass of 60 with 28 units of nitrogen: \[\frac{28}{60}\times 100 = 46.7\%\] Ammonium nitrate is 35 per cent, ammonium chloride 26 per cent and ammonium sulphate 21 per cent, which is why urea is the commonest nitrogenous fertiliser.
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