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Given below are two statements: One is labelled as Assertion A and the other labelled as Reason R Assertion A : During the boiling of water having temporary hardness, Mg(HCO3)2 is converted to MgCO3. Reason R : The solubility product of Mg(OH)2 is greater than that of MgCO3. In the light of the above statements, choose the most appropriate answer from the options given below :
- Both A and R are true but R is not the correct explanation of A
- A is true but R is false
- Both A and R are true and R is the correct explanation of A
- A is false but R is true
Correct answer: A is false but R is true
Solution
Assertion A is incorrect because during boiling, Mg(HCO3)2 decomposes to form Mg(OH)2 and CO2, not MgCO3 directly. However, Reason R is accurate as it correctly states that the solubility product of Mg(OH)2 is indeed greater than that of MgCO3.
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