BCECE Engineering BCECE Engineering Solved Paper-2009

  • question_answer
    The salt responsible for permanent hardness of \[{{\text{H}}_{\text{2}}}\text{O}\]is

    A)  \[N{{a}_{2}}S{{O}_{4}}\]             

    B)         \[MgHC{{O}_{3}}\]        

    C)         \[NaCl\]             

    D)         \[MgC{{l}_{2}}\]

    Correct Answer: D

    Solution :

    Chlorides and sulphates of calcium and magnesium are responsible for permanent hardness of water.


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