At room temperature, the average speed of Helium is higher than that of Oxygen by a factor of -
1.
2.
3. 8
4. 6
At 27 C, the ratio of root mean square speeds of ozone to oxygen is-
1.
2.
3.
4. 0.25
The temperature at which the r.m.s velocity of carbon dioxide becomes the same as that of nitrogen at 210C is-
1. 462 oC
2. 273 K
3. 189 oC
4. 546 K