Which of the following compounds are used in fertilisers?
A
Nitrogen molecule
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B
Ammonium nitrate
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C
Ammonia
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D
Urea
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Solution
The correct options are B Ammonium nitrate C Ammonia D Urea Nitrogen is very essential for the growth of plants. Atmospheric nitrogen cannot be directly used by the plants. Hence ammonia and salts of ammonia like ammonium nitrate and urea are sprayed in the form of fertilisers to provide nitrogen.