A) two times than He
B) four times than He
C) 1.4 times than He
D) similar to He
Correct Answer: C
Solution :
The rate of diffusion \[\frac{{{r}_{1}}}{{{r}_{2}}}=\sqrt{\frac{{{M}_{2}}}{{{M}_{1}}}}\] Here, molecular mass of hydrogen, \[{{M}_{1}}=2\] molecular mass of helium, \[{{M}_{2}}=4\] \[\therefore \] \[\frac{{{r}_{1}}}{{{r}_{2}}}=\sqrt{\frac{4}{2}}=\sqrt{2}=1.4\] \[\therefore \] \[{{r}_{1}}=1.4{{r}_{2}}\]
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