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Give one example each of sol and gel....

Give one example each of sol and gel.

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Sol : `As_2S_3`, Gel : Gum arabic
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MODERN PUBLICATION-SURFACE CHEMISTRY-REVISION EXERCISE (VERY SHORT ANSWER QUESTIONS )
  1. Which of the two, adsorption or absorption, is surface phenomenon?

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  2. Given one example each of lyophobic sol and lyophilic so .

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  3. Give one example each of sol and gel.

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  4. Given one example eacg of 'oil water' and 'water oil' emulsion.

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  5. Out of BaCl(2) and KCl, which is more effective in causing coagulation...

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  6. Write one similarity between physisorption and chemisorption.

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  7. The enzymes which convert glucose into ethyl alcohol is

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  8. Define positive and negative catalysis.

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  9. The dispersed phase and dispersion medium in soap lather are respectiv...

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  10. What is differnece between an emulsion and a gel ?

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  11. Which will be adsorbed more readily on the surface of charcoal and why...

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  12. Of physisorption and chemisorption which type of adsorption has a high...

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  13. Give an example of 'shape-selective catalyst'.

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  14. What is the effect of temeperature on chemisorption?

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  15. Why is adsorption always exothermic ?

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  16. What are the dispersed phase and dispersion medium in milk

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  17. Write a method by which lyophobic colloids can be coagulated.

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  18. Write the main reason for the stability of colloidal sols.

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  19. What type of colloid is formed when a solid is dispersed in a liquid? ...

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  20. CO(g) and H(2)(g) react to give different products in the presence of ...

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