Which of the following chemicals is not present in clear hard water? 

Which of the following chemicals is not present in clear hard water? 

  1. A

    MgCO3

  2. B

    MgSO4

  3. C

    MgHCO32

  4. D

    CaCl2

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    Solution:

    MgCO3 is insoluble in water.  

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