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

  • question_answer
    If excess of \[N{{H}_{4}}OH\] is added to \[CuS{{O}_{4}}\] solution, it forms blue coloured complex which is [MP PMT 1971, 79; Bihar CEE 1995; RPET 1999; AFMC 2001]

    A) \[Cu{{(N{{H}_{3}})}_{4}}S{{O}_{4}}\]

    B) \[Cu{{(N{{H}_{3}})}_{2}}S{{O}_{4}}\]

    C) \[Cu{{(N{{H}_{4}})}_{4}}S{{O}_{4}}\]

    D) \[Cu{{(N{{H}_{4}})}_{2}}S{{O}_{4}}\]

    Correct Answer: A

    Solution :

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


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