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  • G.K. (General Science) - 1
  • Which of the following is sodium compound used for soften...
Multiple choice

Which of the following is sodium compound used for softening hard water?

  1. Sodium Carbonate

  2. Sodium chloride

  3. Sodium oxide

  4. None of these

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A Correct answer
Explanation

Sodium carbonate (washing soda) is used to soften hard water by precipitating calcium and magnesium ions.

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