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Uttarakhand PMT Uttarakhand PMT Solved Paper-2006

  • question_answer
    Ratio of molecular weights of A and B is\[\frac{4}{25},\]then ratio of rates of diffusion will be:

    A)  \[5:1\]             

    B)  \[5:2\]

    C)  \[25:3\]            

    D)  \[25:4\]

    Correct Answer: B

    Solution :

     According to Grahams rule \[\frac{{{r}_{1}}}{{{r}_{2}}}=\sqrt{\frac{{{M}_{2}}}{{{M}_{1}}}}\] Or \[\frac{{{r}_{1}}}{{{r}_{2}}}=\sqrt{\frac{25}{4}}\Rightarrow \frac{5}{2}\] Hence, ratio of diffusion is\[5:2\]


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