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The incorrect statement pertaining to th...

The incorrect statement pertaining to the adsorption of a gas on a solid surface is :

A

Adsorption is always exothermic

B

Physisorption may transform into chemisorption at high temperature

C

Physisorption increases with increasing temperature but chemisorption decreases with increasing temperature

D

Chemisorption is more exothermic than physisorption ,however, it is very slow due to higher energy of activation

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The correct Answer is:
C
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The correct statement(s) pertaining to the adsorption of a gas on a solid surface is (are)

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The correct statements pertaining to the adsorption of a gas on a solid surface are (i) Adsorption is always exothermic (ii) Physisorption may transform into chemisorption at high temperature (iii) Physisorption increases with increasing temperature but chemisorotion decrease with increasing temperature (iv) Chemisorption is more exothermic than physisoption, however, it is very slow due to higher energy of activation

OP TANDON-ADSORPTION AND CATALYSIS-OBJECTIVE QUESTIONS (LEVEL-B)
  1. Which is not correct for physical adsorption ?

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

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

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

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

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

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

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  8. Which can adsorbe large volume of hydrogen gas ?

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  9. Which is false for catalyst ?

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

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  11. Which of the following statements is incorrect ?

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

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

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

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

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

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

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

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  19. Following graphs will be true when :

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  20. Methylene blue, from its aqueous solution, is adsorbed on activated ch...

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