In one of the industrial processes used for manufacture of sodium hydroxide, a gas ‘X’ is formed as a by-product. The gas ‘X’ reacts with lime water to give a compound ‘Y’ which is used as a bleaching agent in the chemical industry. Identify ‘X’ and ‘Y’.

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X is chlorine, Y is baking soda

X is chlorine, Y is bleaching powder

X is hydrogen, Y is potash

X is hydrogen, Y is plaster of Paris

answer is B.

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Detailed Solution

Concept- Sodium hydroxide, hydrogen gas, and chlorine gas are all created when ordinary salt and water interact. The color-alkali process is the name of this procedure.
Whenever common salt and water react together, we see that sodium hydroxide is formed as a product. Along with it hydrogen and chlorine gas is also released. According to the question, compound Y is a bleaching agent therefore it is calcium oxychloride. It is usually used as bleaching powder and as a bleaching agent in industries.
Hence, the correct answer is option 2.

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