Question

Assertion : Calgon is used for removing permanent hardness of water.
Reason : Calgon forms precipitates with $Ca ^{2+}$ and $Mg ^{2+}$.

• A. If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
• B. If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
• C. If the Assertion is correct but Reason is incorrect.
• D. If the Assertion is incorrect and Reason is correct.

Answer 1

Answer: (C)

Assertion is correct reason is incorrect. Correct reason : Calgon forms soluble complexes with $Ca ^{2+}$ and $Mg ^{2+}$ in which properties of these ions are marked.