Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-5

  • question_answer
    Temporary hardness of water can be removed

    A)  By passing \[C{{O}_{2}}\]

    B)  By passing\[S{{O}_{2}}\]

    C)  By adding \[Ca{{\left( OH \right)}_{2}}\]

    D)  By adding \[NaCl\]

    Correct Answer: C


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