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JEE Main & Advanced Chemistry Analytical Chemistry Question Bank Wet Test for Basic Radical

  • question_answer
    On adding excess of ammonium hydroxide to a copper sulphate solution [MP PMT 1995]

    A) Blue precipitate of copper hydroxide is obtained

    B) Black precipitate of copper oxide is obtained

    C) A deep blue solution is obtained

    D) No change is observed

    Correct Answer: C

    Solution :

    \[\underset{(\text{excess)}}{\mathop{4N{{H}_{4}}OH}}\,+CuS{{O}_{4}}\to \left[ Cu{{(N{{H}_{3}})}_{4}} \right]\,S{{O}_{4}}\]\[+4{{H}_{2}}O\]


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