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
• B. Both assertion and reason are true, but reason is not correct explanation of the assertion
• C. Assertion is true,but the reason is false
• D. Assertion is false, but the reason is true

Answer 1

Answer: (A)

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.