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A : Temporary hardness is due to HCO(3)^...

A : Temporary hardness is due to `HCO_(3)^(-)` ions.
R : permanent hardness is due to `CaCl_(2)`

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)

B

If both Assertion & Reason are true but the reason is not the correct explanantion of the assertion, then mark (2)

C

If assertion is true statements but Reason is false, then mark (3)

D

If both Assertion and Reason are false statements, then mark (4)

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we will analyze the assertion and reason provided, and determine their validity and relationship. ### Step 1: Analyze the Assertion The assertion states: "Temporary hardness is due to `HCO3^(-)` ions." - Temporary hardness in water is primarily caused by the presence of bicarbonates of calcium and magnesium. When water containing these bicarbonates is heated, they decompose to form insoluble carbonates, which can be removed. Therefore, the assertion is **true**. ### Step 2: Analyze the Reason The reason states: "Permanent hardness is due to `CaCl2`." - Permanent hardness is caused by the presence of soluble salts such as chlorides and sulfates of calcium and magnesium. Calcium chloride (`CaCl2`) is indeed one of the compounds that contribute to permanent hardness. Therefore, the reason is also **true**. ### Step 3: Determine the Relationship Now we need to evaluate whether the reason is the correct explanation for the assertion. - While both the assertion and reason are true, the reason does not explain why temporary hardness is due to bicarbonate ions. Instead, it describes a different type of hardness (permanent hardness). Therefore, the reason is **not the correct explanation** of the assertion. ### Conclusion - Both the assertion and reason are true, but the reason is not the correct explanation for the assertion. ### Final Answer - The correct option is: **Both assertion and reason are true, but reason is not the correct explanation of assertion.** ---
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