Which one of the following statements about fertilizers is not correct?
[amp_mcq option1=”Urea is a phosphorus-containing fertilizer.” option2=”Application of fertilizer to the soil increases fertility of the soil.” option3=”Urea can be prepared by action of ammonia and carbon dioxide under high pressure and at high temperature.” option4=”Urea contains more nitrogen than other fertilizers.” correct=”option1″]
This question was previously asked in
UPSC NDA-1 – 2022
– Urea has the chemical formula (NH₂)₂CO. It is a rich source of nitrogen, with approximately 46% nitrogen by weight.
– Phosphorus-containing fertilizers typically contain compounds like phosphates (e.g., calcium phosphate in superphosphate).
– Statement B is correct: Fertilizers add essential nutrients to the soil, thus increasing its fertility and supporting plant growth.
– Statement C is correct: Urea is synthesized industrially from ammonia (NH₃) and carbon dioxide (CO₂) under high pressure and temperature (Bosch–Meiser process).
– Statement D is generally correct in the context of solid nitrogen fertilizers; urea has one of the highest nitrogen contents among commonly used solid fertilizers.