Question

which substance is used in fertilizers?
○ slaked lime (ca(oh₂))
○ formic acid (hcooh)
○ nitric acid (hno₃)
○ lithium hydroxide (lioh)

Explanation:

Nitric acid is used in the production of nitrogen - based fertilizers. Slaked lime is often used for soil - pH adjustment, formic acid has other industrial uses not related to fertilizers mainly, and lithium hydroxide is not used in fertilizers.

Answer:

C. nitric acid ($HNO_3$)