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J & K CET Engineering J and K - CET Engineering Solved Paper-2003

  • question_answer
     50 mL of hydrogen diffuses through small hole from a vessel in 20 min time. Time taken for 40  mL of oxygen to diffuse out under similar conditions will be

    A)  12 min       

    B)  32 min

    C)  8 min        

    D)  64 min

    Correct Answer: D

    Solution :

     \[\frac{{{r}_{{{H}_{2}}}}}{{{r}_{{{O}_{2}}}}}=\sqrt{\frac{{{M}_{{{O}_{2}}}}}{{{M}_{{{H}_{2}}}}}}\] \[\frac{50/20}{40/t}=\sqrt{\frac{32}{2}}\] \[\left( \because \,r=\frac{V}{t} \right)\] \[\frac{t}{16}=4\Rightarrow t=64\,min\]


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