Q664
Alum is used as
A.
An analgesic
B.
A fertilizer
C.
A disinfectant
D.
A purifier for water
AnswerAnswer: Option D
Solution
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.