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Q: Permanent hardness of water is due to the presence of  ?

  • 1
    Calcium sulphate
  • 2
    Calcium bicarbonate
  • 3
    Sodium bicarbonate
  • 4
    Magnesium bicarbonate
  • Show Answer
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Answer : 1. "Calcium sulphate"
Explanation :

Answer: A) Calcium sulphate Explanation:

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