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AFMC AFMC Solved Paper-2006

  • question_answer
    A gas mixture contains \[{{\text{O}}_{\text{2}}}\] and \[{{\text{N}}_{\text{2}}}\]in the ratio of 1: 4 by weight. The ratio of their number of molecules is :

    A) 1:8                                         

    B) 1 : 4

    C) 3: 16                                      

    D) 7: 32

    Correct Answer: D

    Solution :

    \[\because \] the ratio of \[{{\text{O}}_{\text{2}}}\] and \[{{\text{N}}_{\text{2}}}\]by weight is 1 : 4. \[\therefore \] the ratio of \[{{\text{O}}_{\text{2}}}\] and \[{{\text{N}}_{\text{2}}}\]by moles \[=\frac{1}{32}:\frac{4}{28}\]                                                                 \[=7:32\]


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