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Why is air sometimes considered as a het...

Why is air sometimes considered as a heterogeneous mixture ?

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Air sometimes considered as a heterogeneous mixture due to the presence of dust particles which form a separate phase.
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True or False. If false give the correct statement: (i) An alloy is a heterogenous mixture of metal. (ii) All metals are solids are room temperature.

SURA PUBLICATION-BASIC CONCEPTS OF CHEMISTRY AND CHEMICAL CALCULATIONS-ADDITIONAL QUESTIONS (ADDITIONAL SHORT ANSWERS)
  1. Calculate the total number of electrons present in 17g of ammonia.

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  2. Mixutre of salt and water is a solution while that of oil and water is...

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  3. Why is air sometimes considered as a heterogeneous mixture ?

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  4. By applying the knowledge of chemical classification, classify each of...

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  5. Matter is defined as anything that has mass and occupies space. All ma...

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  6. List the differences between elements and compounds.

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  7. Write a note on 'mxiture' based on the chemical classification of matt...

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  8. How will you classify matter based on physical state ?

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  9. Explain the classification of matter based on chemical composition.

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  10. Define the avogadro's number :

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  11. Define molar volume.

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  12. State Avogadro's law.

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  13. Which law co-relates the mass and volume of a gas ?

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  14. Motor volume is occupied 1 mole of any (ideal) gas at standard tempera...

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  15. Bring about the dissimilarities in mole concept and molar mass by clea...

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  16. (i) If an acid is mono basic. How will you relate their equivalent mas...

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  17. Why are the atomic mass of most of the elements fractional ?

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  18. Write down the formulate for calculating the equivalent mass of an aci...

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  19. Define limiting reagent .

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  20. Define stoichiometry.

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