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NEET Chemistry NEET PYQ-Alkaline Earth Metals

  • question_answer
    The method used to remove temporary hardness of water is:                          [NEET 2019]

    A) Ion-exchange method

    B) Synthetic resins method

    C) Calgon’s method

    D) clark’s method

    Correct Answer: D

    Solution :

    [d] Clark’s method is used to remove temporary hardness \[Ca{{(HC{{O}_{3}})}_{2}}+C{{a}^{+2}}\text{ }or\text{ }M{{g}^{+2}}\to CaC{{O}_{3}}\] \[or\text{ }MgC{{O}_{3}}+{{H}_{2}}O\]


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