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What is the role of activated charcoal i...

What is the role of activated charcoal in gas mask used in coal mines?

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Activated chrcoal adsorbs the the poisonous gases usually present in coal mines.
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The role of the activation charcoal in gas mask used coal mine is

(i) What is the role of activated charcoal in gas mask ? (ii) A colloidal sol is prepared by the given method in figure. What is the charge on hydrated ferric oxide colloidal particles formed in the test tube ? How is the sol represented? (iii) How does chemisorption vary with temperature?

Activated charcoal is prepared by :

PRADEEP-SURFACE CHEMISTRY -SHORT ANSWER QUESTIONS
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  2. A colloid is formed by adding FeCl(3) in excess of hot water. What wil...

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  3. How do emulsifiers stabilise emulsion ? Name two emulsifiers.

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  4. Why are some medicines more effective in the colloidal form ?

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  8. On the basis of Hardy-schulze rule explain why the coagulating power o...

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  9. Why does bleeding stop by rubbing moist alum?

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  10. Why is Fe(OH)(3) colloid positively charged when prepared by adding Fe...

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  11. Why do physisorption and chemisorption behave differently with rise in...

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  12. What happens when dialysis is prolonged?

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  13. Why does the white precipitate of silver halide become coloured in the...

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  14. What is the role of activated charcoal in gas mask used in coal mines?

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  15. How does a delta form at the meeting place of sea and river water?

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  16. Given an example where physisorption changes to chemisorption with ris...

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  17. Why is desorption important for a substance to act as good catalyst?

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  18. What is the role of diffusion in heterogeneous catalyst?

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  19. How does a solid catalyst enhance the rate of combination of gaseous ...

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