Published by:
CGP EDU Academic Team
Published on: September 12, 2026
The r.m.s. speed of oxygen molecules at 
is equal to that of the hydrogen molecules kept at 
C. (Mass of oxygen molecule/mass of hydrogen molecule 
)
Text Solution
Verified by ExpertsThe correct answer is:
B
The root-mean-square speed of gas molecules is: 
, where 
is absolute temperature and 
is molar mass.
For oxygen at 
with 
:
For hydrogen with 
at temperature 
:
Equating the RMS speeds:
Converting to Celsius: 
,
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