Assertion : Permanent hardness of water is removed by treatment with w

1.	Assertion : Permanent hardness of water is removed by treatment with washing soda. Reason : Washing soda reacts with soluble calcium and magnesium chlorides and sulphates in hard water to form insoluble carbonates (a) Both assertion and reason are true and reason is the correct explanation of assertion. (b) Both assertion and reason are true but reason is not the correct explanation of assertion. (c) Assertion is true but reason is false (d) Both assertion and reason are false
Answer» (a) Both assertion and reason are true and reason is the correct explanation of assertion. Ca²⁺ + Na₂CO₃ → CaCO₃↓ + 2Na⁺

Assertion : Permanent hardness of water is removed by treatment with washing soda. Reason : Washing soda reacts with soluble calcium and magnesium chlorides and sulphates in hard water to form insoluble carbonates (a) Both assertion and reason are true and reason is the correct explanation of assertion. (b) Both assertion and reason are true but reason is not the correct explanation of assertion. (c) Assertion is true but reason is false (d) Both assertion and reason are false

Answer»

(a) Both assertion and reason are true and reason is the correct explanation of assertion.

Ca²⁺ + Na₂CO₃ → CaCO₃↓ + 2Na⁺

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