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Why does physisorption decrease with inc...

Why does physisorption decrease with increase of temperature ?

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The correct Answer is:
Due to decrease in molecular attractive force between adsorbate and adsorbent.
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Why does physisorption decrease with the increase of temperature ?

Which of the following statements is not true? a. Both physisorption and chemisorption are exothermic. b. Physisorption occurs with increase of free energy. c. Physisorption requires low activation energy but chemisorption requires high activation energy. d. The magnitude of chemisorption increases and that of physisorption decreases with rise in temperature.

Rate of physisorption increases with

The correct statement(s) pertaining to the adsorption of a gas on a solid surface is(are) (i) adsorption is always exothermic (ii) physisorption may transform into chemsisorption transform into chemisorption at high temperature (iii) physisorption increases with increasing temperature but chemisorption decreases with increasing temperature . (iv) chemisorption is more exothermic than physisorption , however it is very slow due to higher energy of activation.

The rate of physisorption increases with (a)Decrease in temperature (b)Increase in temperature (c)Both A and B (d)None of these

Why does the speed of sound increase with increase in temperature?

Name a substance whose resistance decreases with the increase in temperature.

Assertion (A): Ionic conductivities increase with increase of temperature and pressure. Reason (R): Viscosity of water decreases with increasew of temperature and increases with the increases of pressure.

Assertion : The angle of contact of a lilquid with a solid decreases with increase in temperature. Reason : With increase in temperature, the surface tension of the liquid increases.

Assertion (A) : The value of K for a reaction may increase or decrease with increase in temperature depending upon whether the reaction is exothermic or endothermic. Reason (R) : With increase in temperature, the extent of reaction increases.

AAKASH INSTITUTE ENGLISH-SURFACE CHEMISTRY -TRY YOURSELF
  1. Which type of gases are readily adsorbed by solids?

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  2. Write any two characteristics of Chemisorption.

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  3. Why does physisorption decrease with increase of temperature ?

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  4. What is the change in mass and composition of catalyst after the compl...

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  5. Write the name of scientist who suggested the term catalyst first?

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  6. Metals of how many groups of periodic table show maximum catalytic act...

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  7. Which catalyst is used to convert alcohol directly to petrol?

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  8. What are optimum temperature and pH for the enzymes to act best ?

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  9. Which enzyme converts milk into curd?

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  10. Freshly prepared precipitate sometimes gets converted to colloidal sol...

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  11. What is the difference between multimolecular and macromolecular collo...

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  12. Explain the cleansing action of soaps.

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  13. What is the dispersed phase and dispersion medium in gel?

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  14. Why true solutions do not exhibit tyndall effect?

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  15. Write the name of four methods to coagulate lyophobic colloids

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  16. What is most accepted reason for the presence of charge on colloids?

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  17. Define coagulation value.

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  18. Why is adsorption always exothermic ?

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  19. What is the effect on entropy change (triangle S) in adsorption?

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  20. Which adsorption has low enthalpy of adsorption ?

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