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Percentage of copper and oxygen in sampl...

Percentage of copper and oxygen in samples of `CuO` obtained by different methods were found to be the same. This proves the law of  

A

Constant proportions

B

Reciprocal proportions

C

Multiple proportions

D

Conservation of mass

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The correct Answer is:
A
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AAKASH SERIES-STOICHIOMETRY-Objective Exercise -1
  1. Chemical equation is balanced according to the law of

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  2. Two gaseous samples were analysed. One contained 1.2 g of carbon and 3...

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  3. Percentage of copper and oxygen in samples of CuO obtained by differen...

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  4. (A) : The law of conservation of mass holds good for all reactions. ...

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  5. "The total mass of reactants is always equal to the total mass of prod...

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  6. In the reaction between hydrogen and oxygen gives water vapour, the ra...

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  7. Law of combining volumes was proposed by

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  8. Two samples of lead oxide were separately reduced to metallic lead by ...

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  9. One part of an clement A combines with two parts of B (another element...

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  10. 14g of element X combine wilh 16 g of oxygen. On the basis of this inf...

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  11. Chemical equation is balanced according to the law of

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  12. {:("LIST - 1","LIST - 2"),("A) Law of conservation of Mass","1) "V(1)/...

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  13. Carbon and oxygen combine to form two oxides, carbon monoxide and carb...

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  14. Two elements X (at.mass 16) ard Y (at. mass 14) combine to form compou...

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  15. 4.4g of an oxide of nitrogen gives 2.24L of nitrogen and 60g of anothe...

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  16. Which one of the following is an isobar of ""(6)C^(14) ?

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  17. The molar volume of any gas at STP is

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  18. One gram - atom of oxygen is

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  19. One gram molecule of oxygen is

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  20. Avogadro number is

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