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Physisorption

Assertion A :...

Question

Assertion (A) : With increase of temperature,elastic property of a substance decreases.
Reason (R) : Elasticity is due to intermolecular forces which decreases with the increase of intermolecular distance.

A

Both assertion and reason are true and the reason is correct explanation of the assertion

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B

Both assertion and reason are true, but reason is not correct explanation of the assertion

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C

Assertion is true, but the reason is false

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D

Assertion is false, but the reason is true

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Solution

The correct option is A Both assertion and reason are true and the reason is correct explanation of the assertion
On heating the mean position of atoms get disturbed and they changes their mean position ( the distance between them increases) this results in decrease of intermolecular forces among atoms and elastic property depends on intermolecular forces.
Thus elastic property decreases.

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