Uttarakhand PMT Uttarakhand PMT Solved Paper-2007

  • question_answer
    Which of the following can effectively remove all types of hardness of water?

    A)  Washing soda  

    B)  Soap

    C)  Slaked lime    

    D)  Boiling

    Correct Answer: B

    Solution :

     Washing soda removes\[C{{a}^{2+}}\]ions effectively but not\[M{{g}^{2+}}\]ions, slaked lime and boiling remove temporary hardness while soap can effectively remove all types of hardness.


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