Which out of the following does not help in disinfecting water?

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Filtration

Alums

Chlorine tablets

Boiling

answer is A.

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Detailed Solution

Filtration does not help in disinfecting water.
Alums, chlorine tablets, and boiling are mostly used as water disinfectants. Chlorine gas is usually used as a water disinfectant. Introducing chlorine to water plays a very influential role in removing almost all pathogenic microorganisms. A pinch of alum added to water removes the solid impurities. Once the sediment is thrown away, the water is boiled to kill bacteria.
Filtering is the technique of separating solids from liquids or gases using a filter material that allows fluid to flow through but not solids. Filtration may be mechanical, biological, or physical.

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