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Catalysts are more effective in...

Catalysts are more effective in

A

Finely powdered state

B

Colloidal state

C

Rough surface

D

All of these

Text Solution

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The correct Answer is:
D
Catalysts are more effective any from (state).
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Assertion :- Catalyst is more effective in powdered form. Reason :- Number of free valencies increase.

Assertion: A catalyst is more effective in finely divided form. Reason: Finely divided form has more surface area.

each question constain STATEMENT-1(Assertion ) and STATEMENT - 2 (reason). examine the statement carefully and work the correct answer accoridng to the instructions given below : STATEMENT-1: A catalyst is more effective in finely divided form. STATENENT-2: Finely divided form has more surface area.

Give reason for the following : (a) Rough surface of catalyst is more effective than smooth surface. (b) Smoke is passed through charged surface before allowing it to come out of chimneys in factories. (c ) Ne gets more easily adsorbed over charcoal than He.

Edges and peaks are more effective in a catalyst because :

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A2Z-SURFACE CHEMISTRY-Section D - Chapter End Test
  1. Catalysts are more effective in

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  2. Which of the following is contributed towards the extra stability of l...

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  3. Which of the following methods is used for sol destruction?

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  4. The decomposition of hydrogen peroxide can be slowed by addition of a ...

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  5. The ability of ion to bring about coagulation of a given collidal solu...

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  6. Which one of the following is an incorrect statement for physisorption

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  7. Which is not colloidal?

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  8. Which one of the following is not a surfactant?

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  9. Size of colloidal particles is

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  10. Which of the following electrolytes is most effective in the coagulati...

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  11. A catalyst is used in a reaction to

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  12. Which of the following is not represented by sols?

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  13. Example of an intrinsic colloid is

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  14. colloidal solution of arsenious sulphide is coagulated by

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  15. Gold number gives

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  16. Point out the false statement

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  17. which of the following does not contain a hydrophobic structures.

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  18. The function of gum arabic in the preparation of Indian ink is

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  19. Which of the following gases is adsorbed most by activated charcoal?

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  20. Spherical gold paricles of radius 10nm, then the number of gold partic...

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  21. Which of the following forms cationic micelles above certain concentra...

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