At 298K and 1atm pressure a gas mixture contains equal masses of He,H2,O2 and NH3. Which of the following is correct for their average molecular velocities?
A
He>H2>NH3>O2
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B
He<H2<O2<NH3
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C
H2<He<NH3<O2
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D
O2<NH3<He<H2
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Solution
The correct option is DO2<NH3<He<H2 Molecular velocities ∝1Mass of gases ∴ Order of their molecular velocities will be O2<NH3<He<H2.