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Why does smoke from a fire often has a b...

Why does smoke from a fire often has a blue tinge ?

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The smoke is colloidal in natere. When ivewed at an angle to the source of light, it appears blue on account of Tyndall effect.
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DINESH PUBLICATION-SURFACE CHEMISTRY -QUESTION FROM BOARD EXAMINATIONS
  1. What is collodion ?

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  2. Give one example of an opaque that is colloidal and an example of opaq...

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  3. Why does smoke from a fire often has a blue tinge ?

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  4. Explain the curding of milk when it is sour.

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  5. What is purple of casis ?

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  6. how will you disitinguish between a true solution and a colloidal solu...

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  7. What happens if an electric field is applied to a colloidal sol ?

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  8. How does chemical adsorption of a gas on the surface of a solid very w...

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  9. How will you prepare a colloidal sol of arsenic suplhide ?s

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  10. Which of the following has minimum flocculation value :-

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  11. What is Milk of Magnesia? For what purpose, is it used ?

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  12. What are surfactants ?

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  13. What is iso-electric point of colloids ?

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  14. What is syneresis or weeping of gels ?

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  15. Explain why dose feeric hydroxide sol get coagulate on addition of sol...

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  16. Why does a beam of light on passing through a colloidal solution have ...

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  17. Milk is an emulsion of fat dispersed in Water. What stabiliser stabili...

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  18. Can the same substance act both as colloid and crystalloid ?

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  19. If a strong beam of light is passed through a colloidal sol place in a...

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  20. Why does clear sky appear blue ?

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