Pick out the correct statement (s)

Options

A. Natural hard water is toxic in nature
B. Natural hard water does not produce lather with soap
C. Water containinng some potash alum is a hard water
D. Water obtained by zeolite process is not pure water.

Answer

B, C, D

Explanation

Hard water containing `Ca^(2+)" or "Mg^(2+)` ions is not toxic.
Hard water soes not produce lather with soap easily.
Water containing potash alum is hard due to the presence of `Al^(3+)` ions.
Water obtained by zeolite process contains `Na^(+)` ions and all the anions are originally present in water.