Question

x ml of h2 gas effuses through a hole in a container in 5 seconds. The time taken for the effusion of same volume of gas specified below under identical conditions is:

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Answer 1

$\huge\blue{ANSWER}$

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Your answer is 20 seconds, oxygen

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Molecular mass of Hydrogen is 2 and that of oxygen is 32.

We know that, the time taken for effusion is indirectly proportional to the square root of molecular mass.

Rate of effution 1/square root of molecular mass

Rate of H2/Rate of O2=square root of 32/square root of 2

Rate of H2/Rate of O2=5.66/1.41=4

Rate of O2=4 times the rate of H2

=> 4×5=20 seconds.

So it is given that oxygen takes 20 seconds for effusion.

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Hence verified