Q. Alum is used
A) in the purification of water
B) as an analgesic
C) as a disinfectant
D) as a fertilizer
โ Correct Answer: in the purification of water
Exam Insight
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A) in the purification of water
B) as an analgesic
C) as a disinfectant
D) as a fertilizer
โ Correct Answer: in the purification of water
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