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NDA 2 2024 GAT, question 117

Topic: Chemistry

Q117

Which one among the following fertilizers is a source of nitrogen ?

  1. (a) Superphosphate
  2. (b) Potassium sulfate
  3. (c) Bone meal
  4. (d) UreaCorrect answer

Solution.

Answer: (d) Urea

  1. Urea, CO(NH2)2CO(NH_{2})_{2}, is about 46% nitrogen and is the main nitrogen fertiliser.
  2. Superphosphate and bone meal are phosphate fertilisers, and potassium sulfate supplies potassium.

Trap: Bone meal contains a little nitrogen too, but it is used as a phosphate source; urea is the nitrogen fertiliser.