A chemical widely used as a fertilizer is?
A
galena
B
bauxite
C
emerald
D
nitrochalk
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
Calcium ammonium nitrate or CAN, also known as nitro-limestone or nitrochalk, is a widely used inorganic fertilizer.
Source: WAEC / JAMB / NECO Classroom Archive (Record #64914)