The correct answer is B. Sodium Sulphate.
A chemical fertilizer is a substance that is added to soil to provide one or more essential plant nutrients. The three main nutrients that are commonly added to soil are nitrogen, phosphorus, and potassium. Other nutrients that may be added include calcium, magnesium, sulfur, iron, zinc, manganese, copper, boron, molybdenum, and chlorine.
Urea is a nitrogen-rich fertilizer that is commonly used in agriculture. It is a white, crystalline solid that is soluble in water. Urea is produced by the reaction of ammonia and carbon dioxide.
Superphosphate is a phosphorus-rich fertilizer that is commonly used in agriculture. It is a mixture of calcium phosphate and calcium sulfate. Superphosphate is produced by the reaction of phosphate rock and sulfuric acid.
Potassium nitrate is a potassium-rich fertilizer that is commonly used in agriculture. It is a white, crystalline solid that is soluble in water. Potassium nitrate is produced by the reaction of potassium chloride and nitric acid.
Sodium sulfate is a salt that is commonly used in industry. It is a white, crystalline solid that is soluble in water. Sodium sulfate is produced by the reaction of sodium chloride and sulfuric acid.
Sodium sulfate is not a chemical fertilizer because it does not provide any essential plant nutrients.