Assertion : Calgon is used for removing `Ca^(2+)` and `Mg^(2+)` ions.
Reason : Calgon forms precipitate with `Ca^(2+)` and `Mg^(2+)` ions.

Options

A. If both (A) and (R) are correct and (R) is the correct explanation of (A).
B. If both (A) and (R) are correct, but (R) is not the correct explanation of (A).
C. If (A) is correct, but (R) is incorrect.
D. If both (A) and (R) are incorrect.

Answer

D

Explanation

Calgon renders `Ca^(2+)` and `Mg^(2+)` ions present in hard water ineffective. Calgon forms soluble complexes with `Ca^(2+)` and `Mg^(2+)` ions.