Question

17. Compound P is used for softening hard water. It reacts with dil. HCl to produce a colourless and odourless gas
Q with brisk effervescence. Gas Q extinguishes fire and turns lime water milky. Identify P and Q. Also write down
the sequence of reactions.

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Answer 1

Answer:

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Answer 2

compound A is washing soda or sodium carbonate decahydrate.the substance used in extinguishing fire is sodium bicarbonate or baking soda.the gas release in CO2 which turns lime water milky.

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