Alum is used5
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Q: Alum is used
- 1as an analgesicfalse
- 2in the purification of watertrue
- 3as a fertilizerfalse
- 4as a disinfectantfalse
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Answer : 2. "in the purification of water"
Explanation :
Answer: B) in the purification of water Explanation: Alum is a common alum, potassium aluminum sulphate K2SO4.Al2SO43.24H2O which makes colloidally suspended impurities in water such as clay to settle down.
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