Answer the following: (i) What happens when crystals of washing soda are left open in dry air? (i...

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Answer the following:
(i) What happens when crystals of washing soda are left open in dry air?
(ii) Name the change that takes place. Which two industries are based on the use of washing soda?
(iii) With the help of balanced chemical equation, state the reaction that takes place when sodium hydrogen carbonate is heated during cooking.

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