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At room themperature, the average speed ...

At room themperature, the average speed of Helium is Helium is higher than of Oxygen by a factor of :

A

`2sqrt2`

B

`6//sqrt2`

C

8

D

6

Text Solution

Verified by Experts

The correct Answer is:
A
Average speed `(r_(avg) ) = sqrt((8RT)/(pi M) )`
`(r_(He))/(r_(O_2)) = sqrt((M_(O_2))/(M_(He)) )`
`(r_(He))/(r_(O_2)) = sqrt(32/4) = 2sqrt2`
`r_(He) = r_(O_2) 2 sqrt2`
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