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Give three reasons why air is considered...

Give three reasons why air is considered a mixture and not a compound.

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MBD-IS MATTER AROUND US PURE-Example
  1. Give two pieces of evidence that sodium chloride is a compound.

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  2. Give reasons to show that ammonia is a compound.

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  3. Give three reasons why air is considered a mixture and not a compound.

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  4. Define crystallisation. Give its importance.

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  5. Some reduced iron filings and powdered roll sulphur are well mixed and...

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  6. What are exothermic and endothermic reactions ?

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  7. What is the importance of evaporation ?

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  8. What are the applications of centrifugation ?

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  9. How will you separate a mixture of Iodine and sand ?

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  10. How will you separate a mixture of Ammonium chloride and common salt ?

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  11. How will you separate a mixture of Carbon disulphide and water

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  12. How will you separate a mixture of Chloroform and water ?

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  13. A solution contains 40 g of NaCl in 320g of water. Calculate its conce...

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  14. Name the separation technique to separate: Insoluble solid in solvent.

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  15. Name the separation technique to separate: Solution of solid in liquid

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  16. Name the separation technique to separate: Miscible mixture of liquids...

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  17. Name the separation technique to separate: Immiscible mixture of liqu...

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  18. Name the separation technique to separate:Mixture of two solids, one o...

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  19. What is fractional distillation ? Give its importance.

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  20. A solution of acetone in water contains 5 ml is 50 ml of its aqueous s...

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