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Explain the observations : Sky appears...

Explain the observations :
Sky appears blue in colour.

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The sky appears blue due to:

Explain the following observation: a. Lyphilic colloid is more stable than lyophobic colloid. b. Coagulation takes place when sodium chloride solution is added to a colloidal solution of ferric hydroxide. c. Sky appears blue in colour.

Explain giving reason why the sky appears blue to an observer from the surface of the earth? What will the colour of the sky be for an astronaut staying in the international space station orbiting the earth? Justify your answer giving reason.

Why does the sky appear blue?

PRADEEP-SURFACE CHEMISTRY -SHORT ANSWER QUESTIONS (III. COLLOIDS)
  1. Explain the observations : Lyophilic colloid is more stable than ly...

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  2. Explain the observations : Coagulation takes place when sodium chlor...

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  3. Explain the observations : Sky appears blue in colour.

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  4. Explain what will you observe when an electrolyte (NaCl) is added to...

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  5. Explain what will you observe when an electric current is passed thr...

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  6. Explain what will you observe when a beam of light is passed through...

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  7. What is zeta potential ? Explain briefly.

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  8. Define the following and give an example of each (a) Coagulation (b)...

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  9. Colloids have many characteristic properties : Among these, Tyndall ef...

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  10. Heat of adsorption is greater for chemisorption than physiorption. Why...

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  11. What is collodion ?

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  12. Differentiate between peptization and coagulation.

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  13. Explain the following with example : (a) Kraft temperature (b)Coagu...

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  14. What are protective colloids? How are the colloids stabilised? Explain...

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  15. What are emulsions ? Write two applications of emulsification.

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  16. What are emulsion ? How will you prepare a stable emulsion ? What are ...

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  17. Describe the cleaning action of soap.

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  18. What are the two classes of emulsions? Give one example of each class....

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  19. Mention two uses of each of colloids and emulsions.

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  20. Distinguish between true solution and colloidal solution of the same c...

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