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According to the adsorption theory of ca...

According to the adsorption theory of catalysis the speed of the reaction increases because

A

adsorption lowers the activation energy of the reaction

B

concentration of reactant molecules at the active centres of the catalyst becomes high bue to adsorption

C

adsorption produces heat which increases the rate of reaction

D

adsorption increases the activation energy of the reaction

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The correct Answer is:
B
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According to the adsoption theory of catalysis ,the speed of the reaction increases because:

Adsorption is a surface phenomenon and it differs feom adsorption which occurs throughout the body of the substance which absorbs. In physisorption, the attractive forces are mainly van der Waals' forces while in chemisorption actual bonding occurs between the particles of adsorbent and adsorbente. Generally, easily liquefying gases are adsorbed more easily on the surface of a solid as compared to teh gases whihc are liquefied with difficult. Adsorption increases with the increases in pressure and decreases as the temperature is increases. According to adsorption theory of catalysis, the speed of the reaction increases because

Substances which alter the velocity of a reaction by mere presence, without undergoing any change in mass and compossition are termed catalyst and the phenomenon is known as catalysis According to the adsorption theroy of catalysis, the rate of reaction increases because

OP TANDON-ADSORPTION AND CATALYSIS-OBJECTIVE QUESTIONS (LEVEL-B)
  1. In the presence of a catalyst, the activation energy is lowered by 3 K...

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  2. According to the adsorption theory of catalysis the speed of the react...

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  3. Which is not correct for physical adsorption ?

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  4. Freundlich adsorption isotherm gives a straight line on plotting :

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  5. The incorrect statement pertaining to the adsorption of a gas on a sol...

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  6. Substances which alter the velocity of a reaction by mere presence, wi...

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  7. For the reaction (A to B+C), the energy profile diagram is given in th...

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  8. Following is the variation of physical adsorption with temperature.

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  9. The colloidal system consisting of a liquid adsorbete in a solid adsor...

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  10. Which can adsorbe large volume of hydrogen gas ?

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  11. Which is false for catalyst ?

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  12. The curveshowing the variation of pressure with temperature for a give...

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  13. Which of the following statements is incorrect ?

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  14. Adsorption is the tendency of accumulation of molecular species at the...

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  15. Adsorption is the tendency of accumulation of molecular species at the...

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  16. Which of the following factors are responsible for the increase in the...

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  17. In Langumir's model of adosrption of a gas on a solid surface :

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  18. An enzyme [E] is combined with the substrate [S] as follows: E+S und...

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  19. Which type of graph gives straight line in Langmuir adsorption isother...

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  20. Plot of log against log P is a straight line inclined at an angl...

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