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Rate of physisorption increases with :...

Rate of physisorption increases with :

A

decrease in temperature

B

increase in temperature

C

decrease in pressure

D

decrease in surface area

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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

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Give reason for the Physisorption decreases with increase in temperature.

Knowledge Check

  • Rate of physisorption increase with

    A
    decrease in temperature
    B
    increase in temperature
    C
    decrease in pressure
    D
    decrease in surface area.

  • 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.

    A
    (i) and (iv) only
    B
    (ii) and (iii) only
    C
    (i),(ii) and (iv) only
    D
    All of these.

  • Rate of physical adsorption increases with

    A
    decrease in surface area
    B
    decrease in temperature
    C
    decrease in pressure
    D
    increase in temperature