Assertion :Physical adsorption and condensation of a gas into liquid involves similar kind of forces. Reason: The heat evolved during physical adsorption is almost of equivalent magnitude as in condensation process.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Both physical adsorption and condensation of a gas involves van der Waals forces of attractions.
The weak, long-range bonding is not surface specific and takes place between all gas molecules on any surface.
Van der Waals interactions cause these surface atoms to be reactive, causing them to attract liquids, vapours and gases in order to satisfy their atomic force imbalance. The attracted molecules fill in the pores on the surface of the solid when adsorption occurs.

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Reason (R) Reactant molecules undergo chemical change irrespective of their orientation during collision.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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