Q. The two metal ions that cause hardness to water are:

  • (A) Calcium, Magnesium
  • (B) Sodium, Calcium
  • (C) Sodium, Potassium
  • (D) Sodium, Magnesium
✅ Correct Answer: (A) Calcium, Magnesium

Published by Kartik Sharma ⭐ 8.52K Points at 04-Jan-2022 03:17 pm in Chemistry

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