Question:medium

Which substance is used for softening permanent hardness of water?

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Important facts:
• Temporary hardness can be removed by boiling.
• Permanent hardness requires chemical treatment.
• Washing soda removes permanent hardness effectively.
Updated On: May 18, 2026
  • Baking soda
  • Washing soda
  • Bleaching powder
  • Common salt
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The Correct Option is B

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