A) 1.4 times to He gas
B) same as He gas
C) 5 times to He gas
D) 2 times to He gas
Correct Answer: A
Solution :
We know that molecular mass of hydrogen \[({{M}_{1}})=2\] and that of helium \[({{M}_{2}})=4.\]. We also know that Grahams law of diffusion \[\frac{{{r}_{1}}}{{{r}_{2}}}=\sqrt{\frac{{{M}_{2}}}{{{M}_{1}}}}=\frac{\sqrt{4}}{2}=\sqrt{2}=1.4\] \[{{r}_{1}}=1.4\,{{r}_{2}}\]
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