Q.

Statement-I: Permanent hardness of water is removed by treatment with washing soda.Statement-II: Washing soda reacts with soluble magnesium and calcium sulphate to form insoluble carbonates.

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a

Both statement-I and statement-II are correct

b

Statement-I is correct and statement-II is incorrect

c

Statement-I is incorrect and statement-II is correct

d

Both statement-I and statement-II are incorrect

answer is A.

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Detailed Solution

Permanent hardness of water is due to calcium or magnesium sulphate and chloride ions which can be removed by reacting with soda (Na2CO3) through formation of insoluble carbonates
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