WBCS.LIVE practice question

Which one of the following is used for water softening?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Mg(HCO₃)₂
  2. Na₃PO₄
  3. Na₆P₆O₁₈
  4. Na₂HPO₄

Correct answer and explanation

Correct answer: Na₆P₆O₁₈