JEE Main & Advanced Chemistry Organic Chemistry: Some Basic Principles & Techniques Question Bank Chemical analysis of organic compounds

  • question_answer In the qualitative analysis of nitrate a brown ring is formed due to the formation of [AMU 2001]

    A) \[N{{O}_{2}}\]

    B) \[FeS{{O}_{4}}N{{O}_{2}}\]

    C) \[{{N}_{2}}O.FeS{{O}_{4}}\]

    D) \[FeS{{O}_{4}}.NO\]

    Correct Answer: D

    Solution :

    Nitrates on reaction with conc. \[{{H}_{2}}S{{O}_{4}}\] and \[FeS{{O}_{4}}\] give a brown ring due to formation of \[FeS{{O}_{4}}.NO\] or  \[[Fe{{({{H}_{2}}O)}_{5}}NO]S{{O}_{4}}\].

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