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One sample of air is found to have 0.03%...

One sample of air is found to have 0.03% carbon dioxide and another sample 0.02%. This illustrate that:

A

air is a compound

B

air is an element

C

air does not follow the law of constant proportions

D

air is a mixture.

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The correct Answer is:
D
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OP TANDON-BASIC PRINCIPLES-OBJECTIVE QUE.
  1. The direct change from solid to gaseous state is referred to as:

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  2. Sulphur burns in oxygen to form sulphur dioxide . The properties of su...

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  3. One sample of air is found to have 0.03% carbon dioxide and another sa...

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  4. Which one of the following is not a mixture?

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  5. Which of the following is a characteristic property of both mixtures a...

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  6. Which of the following processes results in the formation of a new com...

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  7. Which one of the following is not a chemical change?

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  8. The law of multiple proportions is illustrated by the pair of compound...

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  9. In compound A,1,.0g nitrogen combines with 0.57g oxygen. In compound B...

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  10. Which one is the best example of law of conservation of mass?

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  11. A chemical equation is balanced according to the law of:

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  12. SO(2) gas was prepared by (i) burning sulphur in oxygen, (ii) reacting...

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  13. A sample of CaCO(3) has Ca=40%,C=12% and O=48% . If the law of constan...

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  14. Potassium combines with two isotopes of chlorine (.^(35)Cl "and" .^(37...

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  15. Different proportions of oxygen in the various oxides of nitrogen, pro...

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

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  17. H(2)S contains 5.88% hydrogen, H(2)O contains 11.11% hydrogen while SO...

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  18. Number of atoms in 4.25 g of NH(3) is:

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  19. Hydrogen combines with chlroine to form HCl. It also combines with sod...

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  20. Zinc sulphate contains 22.65% n and 43.9% H(2)O . If the law of consta...

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