S

Shyam Dubey • 3.70K Points
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Q. Which of the following compounds is used to soften hard water?

  • (A) Sodium chloride
  • (B) Sodium carbonate
  • (C) Calcium hydroxide
  • (D) Potassium permanganate
  • Correct Answer - Option(B)
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  • Filed under category Chemistry
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Explanation by: Shyam Dubey
Sodium carbonate (Na2CO3) reacts with calcium and magnesium ions in hard water to form insoluble carbonates, thus softening the water.

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