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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+
Correct Answer: Option C
Explanation

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