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