Q27 of 270 Page 96

The electrolysis of an aqueous solution of sodium chloride gives us three products. Name them.

In the process of electrolytic decomposition of aqueous solution of sodium chloride, it decomposes to form sodium hydroxide(near cathode), chlorine(at anode)and hydrogen gas(at cathode). This whole process is known as Chlor-Alkali process.

2NaCl + 2H2O ⇨ 2NaOH + Cl2 + H2


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Name the salt which is used as a preservative in pickles, and in curing meat and fish.

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Name the raw material used for the production of caustic soda.

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During the electrolysis of a saturated solution of sodium chloride, where is:

(a) chlorine formed?


(b) hydrogen formed?


(c) sodium hydroxide formed?

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Fill in the following blanks:

(a) Common salt is obtained from sea-water by the process of ...............:


(b) Rock salt is mined just like. ......................


(c) Chemical formula of washing soda is................


(d) Sodium hydrogen carbonate is.................soda whereas sodium carbonate is.......soda.


(e) The chemical formula of plaster of Paris is..............