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Assertion :- In case of chemical adsorpt...

Assertion :- In case of chemical adsorption, `(x)/(m)` first increase then decrease with temp.
Reason :- The intial increase is due to the fact that heat supplied acts as a activation energy. The decrease afterwards is due to the exothermic nature of adsorption at equilibrium.

A

If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.

B

If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.

C

If Assertion is True but the Reason is False.

D

If both Assertion & Reason are False.

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The correct Answer is:
A
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In the case of chemisorption, why adsorption first increases and then decreases with temperature?

In the case of chemisorption, why adsorption first increases and then decreases with temperature?

Assertion(A): In chemisorption, adsorption keeps on increasing with temperature. Reason(R): Heat keeps on providing more and more activation energy.

Assertion: A catalyst increases the rate of a reaction. Reason: In presence of a catalyst, the activation energy of the reaction decreases.

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Assertion : A change in the temperature of a body cause change in dimentions. Reason : The dimentions of a body decrease due to the increase in its temperature.

Assertion: In any transition series the magnetic moment of M^(2+) ions first increases then decreases Reason: In a transition series, the number of unpaired electrons first increases and then decreases.

Assertion :Solubility of noble gases in water decreases with increases in atomic size Reason :Solubility of noble gases in water is due to instantaneous dipole induced dipole interaction

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.

Assertion : First law of thermodynamics does not forbid flow of heat from lower temperature to higher temperature. Reason : Heat supplied to a system always equal to the increase in its internal energy.

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