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NEET NEET SOLVED PAPER 2015 (C)

  • question_answer
    A mixture of gases contains \[{{H}_{2}}\] and \[{{O}_{2}}\] gases in the ratio of 1 : 4 (w/w). What is the molar ratio of the two gases in the mixture?                                                                                                                                   

    A)  1 : 4      

    B)  4 : 1      

    C)  16 : 1    

    D)  2 : 1

    Correct Answer: B

    Solution :

    Let the mass of \[{{H}_{2}}\] gas be \[xg\] and mass of \[{{O}_{2}}\]gas 4xg Molar   \[{{H}_{2}}:{{O}_{3}}\] Mass      \[2:32\] i.e.          \[1:16\] \[\therefore \]  Molar ratio = \[\frac{{{n}_{{{H}_{2}}}}}{{{n}_{{{O}_{2}}}}}=\frac{x/2}{4x/32}=\frac{x\times 32}{2\times 4x}=\frac{4}{1}=4:1\]


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