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QAIPM-2012-Ch-1624: NEET 2012 Chemistry - Class 11 AIPM-2012-Ch-1624 Solution: A certain gas takes three times as long to effuse out as…
A certain gas takes three times as long to effuse out as helium. Its molecular mass will be 27 u 36 u 64 u 9 u
Multiple Choice Options
- A 27 u
- B 36 u
- C 64 u
- D 9 u
Step-by-Step Verified Solution
According to Graham's law of diffusion
r _ 1 d _ 1 M
_ r 1 r 2 = M 2 M 1
Rate of diffusion = V o l u m e o f g a s d i f f u s e d ( V ) T i m e s t a k e n ( t )
_ V 1 / t 1 V 2 / t 2 = M 2 M 1
If same volume of two gases diffuse then V 1 = V 2
_ t 1 t 2 = M 2 M 1
Here t 2 = 3t, M 1 = 4 u, M 2 = ?
_ 3 t 1 t 1 = M 2 4 _ 3 = M 2 4
_ 9 = M 2 4 _ M 2 = 36 u