JEE Main & Advanced Sample Paper JEE Main - Mock Test - 13

  • question_answer
    Which of the following is used is Clarks method for the removal of temporary hardness?

    A) \[N{{a}_{2}}C{{O}_{3}}\]      

    B) \[Ca{{(OH)}_{2}}\]

    C) \[N{{a}_{2}}A{{l}_{2}}S{{i}_{2}}{{O}_{8}}.x{{H}_{2}}O\]

    D) \[N{{a}_{2}}[N{{a}_{4}}{{(P{{O}_{3}})}_{6}}]\]

    Correct Answer: B


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