Hard water contains dissolved salts such as magnesium and calcium chlorides, bicarbonates, or sulphates. There are two kinds of hardness of water, i.e. temporary hardness and permanent hardness.
When Graham's salt (calgon) is used for removal of permanent hardness of water, `Ca^(2+)` and `Mg^(2+)` are sequestered in the form of

Options

A. precipitate
B. solution
C. colloidal solution.
D. sedimentation

Answer

B