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 Graham's law of diffusion \[\frac{{{r}_{1}}}{{{r}_{2}}}=\sqrt{\frac{{{M}_{2}}}{{{M}_{1}}}}=\sqrt{\frac{4}{2}}=\sqrt{2}=1.4\]; \[{{r}_{1}}=1.4m\]
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