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

  • question_answer
    The brown ring test for NO2 and \[N{{O}_{3}}^{-}\]is due to the formation of complex ion with the formula [KCET (Eng./Med.) 2000; Kerala PMT 2004]

    A) \[{{\left[ Fe{{\left( {{H}_{2}}O \right)}_{6}} \right]}^{2+}}\]

    B) \[{{\left[ Fe\left( NO \right)\text{ }{{\left( CN \right)}_{5}} \right]}^{2+}}\]

    C) \[{{\left[ Fe{{\left( {{H}_{2}}O \right)}_{5}}NO \right]}^{2+}}\]

    D) \[{{\left[ Fe\left( {{H}_{2}}O \right)\text{ }{{\left( NO \right)}_{5}} \right]}^{2+}}\]

    Correct Answer: C

    Solution :

    The brown ring test for \[NO_{2}^{-}\] and \[NO_{3}^{-}\] is due to formation of \[{{[Fe{{({{H}_{2}}O)}_{5}}NO]}^{2+}}\]


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