The molecules of which of the following gas have higher speed?
A
Hydrogen at −50∘C
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B
Methane at 298K
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C
Nitrogen at 1000∘C
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D
Oxygen at 0∘C
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Solution
The correct option is A Hydrogen at −50∘C u=√3RTM The gas with higher temperature and lower molecular weight has higher molecular speed. Among the given gases, hydrogen at −50oC has maximum value of T/M and highest speed.