25. Which one of the following elements is used in the manufacture of fertilizers ? A.Fluorine B.Potassium C.Lead D.Aluminium
Answer: Option B Solution: Nitrogen, phosphorus and potassium are the three most common bases of fertilizers. Potash can be used to make potassium (K) fertilizers. All commercial potash deposits come originally from marine deposits and are often buried deep in the earth.
