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  9. Q77

SSC GD Constable 2015 · Question 77 of 88

Which of the following methods is not used to remove permanent hardness of water?

  1. Aby mixing sodium carbonate
  2. Bby distillation
  3. Cby mixing caustic soda
  4. Dby boilingCorrect

Answer: D. by boiling

Official answer key verified. Detailed explanation coming soon.

Source: Solved SSC GD 2015 Paper with Solutions — Collegedunia · reliable-secondary

← Q76View full paper (88 questions)Q78 →

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