In chemical terms, what are alums used for purifying water for drinking purposes ?
A. Hydrated chlorides
B. Double nitrate
C. Double sulphates
D. Nitrates of aluminium
Answer: Option C
Solution(By Examveda Team)
Alum is double sulphates having the composition M2SO4. M2(SO4)3.24H2O. Where M stands for monovalent basic radicals. Alums have Germicide properties and thus used in purification of water.This Question Belongs to General Knowledge >> Chemistry
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