At STP, the order of mean square velocity of molecuels of H_(2), N_(2)

1.	At STP, the order of mean square velocity of molecuels of H_(2), N_(2),O_(2) and HBr is:
Answer» `H_(2)gtN_(2)gtO_(2)gtHBr` `HBrgtO_(2)gtN_(2)gtH_(2)` `HBrgtH_(2)gtO_(2)gtN_(2)` `N_(2)gtO_(2)gtH_(2)gtHBr` ANSWER :a

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