Q. Permanent hardness of water can be removed by adding:

  • (A) Chlorine
  • (B) Washing Soda
  • (C) Potassium Permanganate
  • (D) Bleaching Powder
✅ Correct Answer: (B) Washing Soda

Published by Madan ⭐ 7.44K Points at 13-May-2021 05:36 am in Science

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