Question

Statement 1 : Calgon is used for removing $Ca^{2+}$ and $Mg^{2+}$ ions from hard water.
Statement 2 : Calgon forms soluble complexes with $Ca^{2+}$ and $Mg^{2+}$ in which properties of these ions are masked.

• A. If both Statement $1$ and Statement $2$ are true and the statement $2$ is the correct explanation of the statement $1$
• B. If both Statement $1$ and Statement $2$ are true but statement $2$ is not the correct explanation of the statement $1$
• C. If Statement $1$ is true but Statement $2$ is false
• D. If Statement $1$ is false but Statement $2$ is true

Answer 1

Answer: (D)

Statement $1$ is false but statement $2$ is true.
Correct statement $1$: Calgon mask the properties of $Ca^{2+}$ and $Mg^{2+}$ ions present in water without removing them as ppt.