NEET2016Chemistry-Gaseous State
NEET 2016 Chemistry Effusion and Diffusion MCQ Question
Type: MCQ-numerical-Medium
Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape?
A
3/8
B
1/2
C
1/8
D
1/4
Correct Answer
Option A
Detailed Explanation
Using Graham's law of effusion, the rate of effusion is inversely proportional to the square root of molar mass. Therefore, the fraction of oxygen that escapes is 3/8.
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