AIPMT PRELIMS2012Chemistry-Gaseous State
AIPMT PRELIMS 2012 Chemistry Effusion and Diffusion MCQ Question
Type: MCQ-numerical-Medium
50 mL of each gas A and of gas B takes 150 and 200 seconds respectively for effusing through a pin hole under the similar conditions. If molecular mass of gas B is 36, the molecular mass of gas A will be
A
64
B
96
C
128
D
32
Correct Answer
Option D
Detailed Explanation
Using Graham's law of effusion: rate of effusion ∝ 1/√molar mass. (150/200) = √(36/M), solving gives M = 32.
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