JEE Main & Advanced Chemistry The d-and f-Block Elements / d तथा f ब्लॉक के तत्व Question Bank Compounds of Transitional Elements

  • question_answer
    On adding excess of \[N{{H}_{3}}\] solution to \[CuS{{O}_{4}}\] solution, the dark blue colour is due to [CPMT 1990; AIIMS 1982; MP PMT 1989, 92; BHU 1996; JIPMER 1997]

    A) \[{{\left[ Cu{{(N{{H}_{3}})}_{4}} \right]}^{++}}\]

    B) \[{{\left[ Cu{{(N{{H}_{3}})}_{2}} \right]}^{++}}\]

    C) \[{{\left[ Cu(N{{H}_{3}}) \right]}^{+}}\]

    D) None of the above

    Correct Answer: A

    Solution :

    \[CuS{{O}_{4}}+4N{{H}_{3}}\,\to \,{{[Cu{{(N{{H}_{3}})}_{4}}]}^{++}}SO_{4}^{-\,-}\]


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