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Question

A certain volume of H2 effuses from an apparatus in one minute. The same volume of ozonized oxygen (O3+O2) mixture took 246 seconds to effuse from apparatus under identical conditions. Percentage of O2 by mole in mixture is:

A
89.87%
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B
10.13%
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C
76.54%
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D
73.12%
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Solution

The correct option is A 89.87%
rH2rO2=MavMH2
1tH2/1tmix=Mav2
24660=Mav2
(24660)2=Mmix2
Mmix=246×246×260×60=33.62
100×33.62=x×32+(100x)48
x=89.87%

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