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Permanent Hardness

Permanent har...

Question

Permanent hardness of water can be removed by adding ____.

A

Sodium carbonate

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B

Sodium bicarbonate

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C

Calcium sulphate

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D

Sodium chloride

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Solution

The correct option is A
Sodium carbonate

Water is considered as a universal solvent and is used in crystallization process as the solvent as most solutes dissolve in water.

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Similar questions

Identify the odd one out and justify.

(a) Chloride, nitrate, hydride, ammonium

(b) Hydrogen chloride, sodium hydroxide, calcium oxide, ammonia

(c) Acetic acid, carbonic acid, hydrochloric acid, nitric acid

(d) Ammonium chloride, sodium chloride, potassium nitrate, sodium sulphate

(e) Sodium nitrate, sodium carbonate, sodium sulphate, sodium chloride

(f) Calcium oxide, magnesium oxide, zinc oxide, sodium oxide.

(g) Crystalline blue vitriol, crystalline common salt, crystalline ferrous sulphate, crystalline sodium carbonate.

(h) Sodium chloride, potassium hydroxide, acetic acid, sodium acetate.

Q. Assertion (A): Hardness of water is removed by treatment with sodium carbonate.
Reason (R): Sodium carbonate reacts with soluble magnesium and calcium chloride to form water soluble compounds.

Q. write the formula of the following
oxygen ,hydrogen, water, carbon dioxide, copper sulphate ,ferrous sulphate, sodium carbonate, sodium chloride, sodium bicarbonate ,calcium carbonate, silver nitrate ,calcium oxide ,calcium hydroxide ,magnesium hydroxide, potassium nitrate ,sulphuric acid, hydrochloric acid, nitric acid.

Give a balanced equation for the following conversation.

(1). Calcium sulphate in permanent hard water to calcium carbonate using sodium carbonate

Q. The temporary hardness of water due to calcium bicarbonate can be removed by adding:

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