JEE Main & Advanced Chemistry Hydrogen & Its Compounds Question Bank Water or hydride of oxygen

  • question_answer Which of the following is not a hard water

    A) Water containing \[CaC{{l}_{2}}\]

    B) Water containing dil. HCl

    C) Water containing \[MgS{{O}_{4}}\]

    D) None of these

    Correct Answer: D

    Solution :

    Water containing \[C{{a}^{+2}},\ M{{g}^{+2}}\] and \[{{H}^{+}}(>{{10}^{-7}}m)\] is a hard water. \[{{H}^{+}}(aq)+C{{H}_{3}}COONa(aq)\]⇌ \[C{{H}_{3}}COOH(s)+N{{a}^{+}}(aq)\]


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