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JEE Main & Advanced Chemistry Analytical Chemistry Question Bank Preliminary Test

  • question_answer
    Which one of the following metals will give blue ash when its salt is heated with \[N{{a}_{2}}C{{O}_{3}}\] solid and \[Co{{\left( N{{O}_{3}} \right)}_{2}}\] on a charcoal piece [MNR 1987]

    A) \[Cu\]

    B) \[Mg\]

    C) \[Al\]

    D) \[Zn\]

    Correct Answer: C

    Solution :

      \[CoAl{{O}_{2}}\] is formed which is blue. Follow cobalt nitrate-charcoal test.


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