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Rate of physisorption increases with...

Rate of physisorption increases with

A

decrease in temperature

B

increases in temperature

C

decrease in pressure

D

decrease in surface area

Text Solution

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The correct Answer is:
A
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Explore conceptually related problems

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 transpiration increases with the decrease of

Why does physisorption decrease with the increase of temperature ?

Why does physisorption decrease with increase of temperature ?

Assertion : Rate of reaction increases with increase in temperature. Reason : Number of effective collisions increases with increase in temperature.

Fill in the blanks by putting appropriate choices. During adsorption there is _______ in enthalpy and _______ in the entropy of a system by adsorption is a spontaneous process and thus DeltaG must be ________. Rate of physisorption ________ with increase in pressure.

Extent of physisorption of a gas increases with ………. .

Extent of physisorption of a gas increases with ………. .

The rate of reaction increases with increase in activation energy.

Knowledge Check

  • 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 transpiration increases with:

    A
    Intensity of sunlight, high atmospheric `CO_2` level, high water content
    B
    Closure of stomata, high atmospheric `CO_2` level, velocity of wind
    C
    Intensity of sunlight, dry air, high water content
    D
    Opening of stomata, high atmospheric `CO_2` level, shedding of leaves

  • Assertion : Rate of reaction increases with increase in temperature. Reason : Number of effective collisions increases with increase in temperature.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.