Chapter: Fertilizers
Which one of the following statements aboutfertilizers is not correct?
Urea (CO(NH2)2) is classified as a nitrogenous fertilizer and is not a phosphorus-containing compound.
Urea is synthesized through the reaction of ammonia (NH3) and carbon dioxide (CO2) under high pressure and temperature:
Urea's high nitrogen content makes it effective in enhancing soil fertility but does not contribute phosphorus.
B: Fertilizers increase soil fertility. C: Urea can be produced as stated. D: Urea typically has higher nitrogen content than many other fertilizers.
Remember: "Urea = Nitrogen, No Phosphorus." This helps recall that urea is strictly a nitrogen fertilizer.
A table comparing nitrogenous fertilizers (like Urea) and phosphorus fertilizers (like Superphosphate), highlighting their chemical compositions.
Verified against NCERT Class XII Chemistry, Chapter on Fertilizers.
Which one of the following fertiliser is a source of nitrogen?
The primary source of nitrogen in fertilizers is urea, represented by the chemical formula NH2CONH2.
Urea is synthesized through the Haber-Bosch process, which combines nitrogen and hydrogen:
This ammonia can then be reacted to form urea:
Urea dissolves in water, releasing nitrogen for plant uptake, contributing to effective growth.
Remember: "Urea = U + Reactive Nitrogen".
A diagram comparing urea with other fertilizers, showing their nitrogen content with bar graphs for quick visual reference.
Verified against NCERT Class XII Chemistry, Chapter on Fertilizers.
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