Which silicon compound is used in the removal of hardness of water?

Silica gel

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Sand

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Silicon carbide

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Zeolite

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Solution

The correct option is D Zeolite
Silicon compound Zeolite is used in the removal of hardness of water.The natural zeolite that is used for water softening is gluconites or greensand.Zeolites are characteristically soft to moderately hard, light in density, insoluble in water but can act as base exchangers in contact with water containing cations. Hence these can remove Ca²⁺ and Mg²⁺ ions from water when hard water is passed through.

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