NEET Chemistry Hydrogen & Its Compounds / हाइड्रोजन और इसके यौगिक Question Bank Self Evaluation Test - Hydrogen

  • question_answer
    Permanent hardness in water cannot be cured by:        

    A) Treatment with washing soda

    B) Boiling

    C) Calgon's method

    D) Ion exchange method

    Correct Answer: B

    Solution :

    [b] Only temporary hardness which is due to \[HCO_{3}^{-}\] (bicarbonate) ions is removed by boiling.


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