WBCS.LIVE practice question

Permanent hardness is caused by:

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

Answer options

  1. Chlorides and sulfates of Ca/Mg
  2. Carbonates of Ca/Mg
  3. Bicarbonates of Ca/Mg
  4. Nitrates of Na/K

Correct answer and explanation

Correct answer: Chlorides and sulfates of Ca/Mg