Permutit is the name given to:

Aluminium of calcium and sodium

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Hydrated silicate of aluminium and sodium

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Silicates of calcium and magnesium

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Silicates of calcium and sodium

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Solution

The correct option is B
Hydrated silicate of aluminium and sodium

Permutit is a complex organic salt having chemical formula ${Na}_{2} {Al}_{2} {Si}_{2} O_{8} . {xH}_{2} O$ . It is a synthetic zeolite. It is used in ion exchange method for softening of hard water.

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When zeolite (hydrated sodium aluminium silicate), is treated with hard water the sodium ions are exchanged with

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