UPSC Chemistry Metals and Non-metals Question Bank Non - Metals

  • question_answer       Which one of the following is the correct order in which the gases \[{{H}_{2}},Ne,{{O}_{2}}\] and \[{{N}_{2}}\]are evolved on fractional distillation of liquid air? [NDA]

    A) \[{{H}_{2}},Ne,{{O}_{2}},{{N}_{2}}\]     

    B)         \[{{H}_{2}},Ne,{{N}_{2}},{{O}_{2}}\]

    C) \[{{N}_{2}},{{O}_{2}},Ne,{{H}_{2}}\]     

    D)          \[{{O}_{2}},{{N}_{2}},{{H}_{2}},Ne\]

    Correct Answer: B

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