20. The two metal ions that cause hardness to water are: A.Calcium, Magnesium B.Sodium, Calcium C.Sodium, Potassium D.Sodium, Magnesium

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Abhishek Mishra

2 years ago

Answer: Option A Solution: Calcium and magnesium ion cause hardness of water.

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Akshita

2 years ago

b sodium and calcium are the ions

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