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The maximum number of molecules is prese...

The maximum number of molecules is present in

A

15 L of `H_(2)` gas at STP

B

5L of `N_(2)` gas at STP

C

0.5 g of `H_(2)` gas

D

10g of `O_(2)` gas

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BRILLIANT PUBLICATION-SOME BASIC CONCEPTS OF CHEMISTRY-LEVEL-II
  1. Which of the following does not obeys law of multiple proportion?

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  2. Which of the following contain maximum number of atoms?

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  3. The maximum number of molecules is present in

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  4. The number of atoms of oxygen present in 10.6 g of Na(2)CO(3) is

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  5. If mass of one atom is 3.3xx10^(-23) g, the number of nucleons (neutro...

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  6. A mixture of gases contains H(2) and O(2) in the ratio of 1 : 4 (w/w)....

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  7. The number of sodium atom in 2 moles of sodium ferrocyanide is

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  8. In which case the number of molecules of water maximum?

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  9. From 200 mg of CO(2), 10^(21) molecules are removed. How many moles o...

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  10. How many moles of magnesium phosphate 'Mg3(PO4)2' will contain 0.25 mo...

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  11. The weight of iron which will be converted into its oxides by the acti...

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  12. Caffein has molecular weight of 194. It contain 28.9% by mass of nitro...

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  13. The crysalline salt, Na(2)SO(4).xH(2)O on heating loses 55.9% of its w...

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  14. 0.24 g of a volatile liquid on vapourisation gives 45 ml of vapours at...

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  15. The vapour density of a mixture containing NO(2) and N(2)O(4) is 38.3 ...

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  16. A plant virus is a uniform cylindrical particle of 150A^(@) in diamete...

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  17. 0.037 g of an alcohol, R-OH was added to C(2)H(5)Mgl and the gas evolv...

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  18. A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with c...

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  19. Air contains nearly 20% oxygen by volume. The volume of air needed for...

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  20. 20 g of a magnesium carbonate sample decomposes on heating to give car...

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