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Air contains nitrogen and oxygen in the ...

Air contains nitrogen and oxygen in the volume ratio of `4:1`. The average molecular weight of air is

A

30

B

28.8

C

28

D

14.4

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The correct Answer is:
B
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AAKASH SERIES-STOICHIOMETRY-Objective Exercise -1
  1. The number of molecules in one litre of air at STP is

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  2. Which of the following contains the least number of molecules ?

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  3. Air contains nitrogen and oxygen in the volume ratio of 4:1. The avera...

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  4. The number of gram atoms of hydrogen present in 1.5 mole of hydrogen s...

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  5. One mole of molecules of dioxygen represents

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  6. One mole of sodium represents

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  7. The charge present on 1 mole electronsis

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  8. The weight of 0.1 mole of Na(2)CO(3) is

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  9. The molar mass of a substance is 20g. The molecular mass of the substa...

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  10. Avogadro number of helium atoms have a mass of

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  11. The volume of two moles of oxygen at STP

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  12. The following property of a gas does not vary with pressure and temper...

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  13. The ratio between the number of molecules in equal masses of nitrogen ...

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  14. The gas which is twice as dense as oxygen under the same conditions is

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  15. 1 mole of water vapour is condensed to liquid at 25^(@)C. Now this wat...

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  16. A chemical equation is always balanced with respect which one of the f...

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  17. Which of the following has highest mass?

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  18. 1 gram of hydrogen contains6xx10^(23) atoms. Then 4 grams of He contai...

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  19. Elements 'A' and 'B' combine in the ratio of their

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  20. Mg of a substance when vaporized occupy a volume of 5.6 litre at NTP. ...

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