34. Alum is used as A.An analgesic B.A fertilizer C.A disinfectant D.A purifier for water
Answer: Option D Solution: It is aluminum potassium sulphate. This is the type of alum that you find in the grocery store for pickling and in baking powder. It is also used in leather tanning, as a flocculant in water purification, as an ingredient in aftershave and as a treatment to fireproof textiles.
