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JEE Main & Advanced Chemistry Analytical Chemistry Question Bank Critical Thinking Analytical

  • question_answer
    If \[NaOH\] is added to an aqueous solution of zinc ions, a white precipitate appears and on adding excess \[NaOH\], the precipitate dissolves. In this solution zinc exists in the [NCERT 1981; MP PET 1993]

    A) Cationic part

    B) Anionic part

    C) Both in cationic and anionic parts

    D) There is no zinc in the solution

    Correct Answer: D

    Solution :

    \[Z{{n}^{2+}}+2NaOH\to Zn{{(OH)}_{2}}+2N{{a}^{+}}\] \[Zn{{(OH)}_{2}}+2NaOH\to N{{a}_{2}}Zn{{O}_{2}}+2{{H}_{2}}O.\]


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