Question

What is meant by demineralised water?

• A. Water free from cations and anions.
• B. Water free from minerals dissolved in it.
• C. Water free from impurities.
• D. Water free from $Na^{+}$and $K^{+}$ions.

Answer 1

Answer: (A)

Water free from cations and anions.

Answer 2

: Water free from cations $Ca^{2 +},Mg^{2 +},$ etc. and anions $Cl^{-},SO_{4}^{2 -},HCO_{3}^{-}$etc) is called deionised or demineralised water.