Question

A mixture of single superphosphate and triple superphosphate is called:
A.Mean phosphate
B.Average phosphate
C.Double phosphate
D.None of the above

Answer 1

Hint: We must have the knowledge of chemistry of phosphorus and its uses in daily life. to answer this question. The type of fertilizer formed can be used in almost all types of soil. It contains about 43 percent phosphorus.

Complete step by step answer:
Single superphosphate is a mineral fertilizer and soluble in water. It was the first commercial fertilized. It was very widely used as a fertilizer earlier but nowadays it has been replaced by other phosphorus fertilizers that have relatively more phosphorus than single super phosphate. It is formed by mixing the sulphuric acid and natural phosphorus.
Triple super phosphate was widely used as the fertilizer in the 20th century. The other names are calcium dihydrogen phosphate and monocalcium phosphate. Just like single superphosphate its use has been lowered due to other good fertilizers. It is formed by grinding phosphate rock and reacting it with the phosphoric acid. It takes several weeks for the production as the process of formation is slow.
The product formed by mixing of single superphosphate and triple superphosphate is double phosphate or double superphosphate. Double super phosphate has double the amount of phosphate as present in single superphosphate. This is also a fertilizer and can be used in almost all types of soil. It is mainly used for basal application and as an additional fertilizer.

Thus, the correct option is option C.

Note:
The double superphosphate contains about 43 percent phosphorus, this includes free phosphoric acid as well which is about 6 percent. Single superphosphate contains 10 to 20 percent of phosphorus and triple superphosphate contains about 45 percent of phosphorus.