Permutit is:

hydrated sodium aluminium silicate

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sodium hexametaphosphate

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sodium silicate

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sodium meta-aluminate

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Solution

The correct option is A hydrated sodium aluminium silicate
Permutit is hydrated sodium aluminium ortho silicate $N a_{2} A l_{2} S i_{2} O_{8} . x H_{2} O$ . It is an artificial zeolite. It is obtained by fusing $N a_{2} C O_{3}, A l_{2} O_{3}$ and $S i O_{2}$ . It removes, $C a^{2 +}, M g^{2 +}$ and $F e^{2 +}$ ions and releases an equivalent number of $N a^{+}$ ions.

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Which solution is used with the bauxite to obtain sodium meta aluminate during the conversion of bauxite into alumina?

Write the balanced chemical equations of the following reactions.

(a) Sodium hydroxide + sulphuric acid $\to$ sodium sulphate + water

(b) Potassium bicarbonate + sulphuric acid $\to$ potassium sulphate + carbon dioxide + water

(d) Chlorine + sulphur dioxide + water $\to$ sulphuric acid + hydrogen chloride

(e) Silver nitrate $\to$ silver + nitrogen dioxide + oxygen

(f) Copper + nitric acid $\to$ copper nitrate + nitric oxide + water

(g) Ammonia + oxygen $\to$ nitric oxide + water

(h) Barium chloride + sulphuric acid $\to$ barium sulphate + hydrochloric acid

(i) Zinc sulphide + oxygen $\to$ zinc oxide + sulphur dioxide

(j) Aluminium carbide + water $\to$ aluminium hydroxide + methane

(k) Iron pyrites ( $F e S_{2}$ ) + oxygen $\to$ ferric oxide + sulphur dioxide

(l) Potassium permanganate + hydrochloric acid $\to$ potassium chloride + manganese chloride + chlorine + water

(m) Aluminium sulphate + sodium hydroxide $\to$ sodium sulphate + sodium meta aluminate + water.

(n) Aluminium + sodium hydroxide + water $\to$ sodium meta aluminate + hydrogen

(o) Potassium dichromate + sulphuric acid $\to$ potassium chloride + chromium chloride + water + chlorine.

(p) Sulphur + nitric acid $\to$ sulphuric acid + nitrogen dioxide + water.

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