Which one of the following fertilizers provides the nitrogen and phosphorus to the plant ?
Correct answer: C. diammonium phosphate
- A. urea
- B. calcium superphosphate
- C. diammonium phosphate
- D. potassium nitrate
Explanation
Diammonium phosphate, (NH4)2HPO4, contains both nitrogen in the ammonium ions and phosphorus in the phosphate ion, so it supplies both nutrients. Urea supplies nitrogen only, calcium superphosphate mainly supplies phosphorus, and potassium nitrate supplies nitrogen and potassium. Students may choose urea because it is a well-known nitrogen fertilizer, but it contains no phosphorus.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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