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Two metallic ions commonly present in hard water are
...

Two metallic ions commonly present in hard water are

A.

Ca²⁺ and Zn²⁺

B.

Cu²⁺ and Na⁺

C.

Mg²⁺ and Ca²⁺

D.

Fe²⁺ and Na⁺

E.

Zn²⁺ and Cu²⁺

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Correct answer is C

No explanation has been provided for this answer.

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