Q. River water is harder than rain water because it

  • (A) is exposed to the atmosphere
  • (B) contains salts of calcium and magnesium
  • (C) is always flowing
  • (D) contains sodium chloride
✅ Correct Answer: (B) contains salts of calcium and magnesium

Published by Yashika ⭐ 3.75K Points at 30-Oct-2022 11:06 am in Chemistry

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