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Byju's Answer
Standard XII
Chemistry
Applications of Colloids
Alum is used ...
Question

Alum is used to purify water since it acts as


A

Bactericide

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B

De-odorant

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C

Softener

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D

Coagulant

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Solution

The correct option is D

Coagulant


Al3+ ions in potash alum (K2SO4.Al(SO4)3.24H2O) coagulates mud particles in water


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