Both temporary and permanent hardness is removed on boiling with

Options

A. `CaSO_(4)`
B. `Na_(2) CO_(3)`
C. `CaCO_(3)`
D. CaO

Answer

B

Explanation

`Ca(HCO_(3))_(2) + NaCO_(3) to CaCO_(3)+ 2 Na(HCO_(3))`
`CaCl_(2) + Na_(2)CO_(3) to CaCo_(3) + 2NaCl`
`Ca^(2+)` or `Mg^(2+)` ions are removed as insolauble carbonates .