The correct answer is A. Ca(CN)2.
A nitrogenous fertilizer is a type of fertilizer that contains nitrogen. Nitrogen is an essential nutrient for plant growth, and it is found in proteins, nucleic acids, and chlorophyll. Nitrogenous fertilizers can be either organic or inorganic. Organic nitrogenous fertilizers are derived from natural sources, such as animal manure or compost. Inorganic nitrogenous fertilizers are manufactured from chemicals, such as ammonia or ammonium nitrate.
Ca(CN)2 is calcium cyanamide. It is a white, odorless solid that is used as a fertilizer, a pesticide, and a fire retardant. Calcium cyanamide is not a nitrogenous fertilizer because it does not contain nitrogen. It is a nitrogen-fixing fertilizer, which means that it
converts atmospheric nitrogen into a form that plants can use.B. CaCN2 is calcium cyanamide. It
is a white, odorless solid that is used as a fertilizer, a pesticide, and a fire retardant. Calcium cyanamide is a nitrogen-fixing fertilizer, which means that it converts atmospheric nitrogen into a form that plants can use.C. NH4NO3 is ammonium nitrate. It is a white, crystalline solid that is used as a fertilizer, a propellant, and an explosive. Ammonium nitrate is a nitrogenous fertilizer because it contains nitrogen.
D. Urea is a white, crystalline solid that is used as a fertilizer, a protein supplement, and a precursor to explosives. Urea is a nitrogenous fertilizer because it contains nitrogen.