Assertion (A): During phase change temperature of the substance remains constant.
Reason (R): Internal energy of the substance during change of phase remains constant.
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false
Solution:
Assertion (A) is true; temperature is constant during phase change. Reason (R) is false; internal energy changes as latent heat is absorbed/released to alter molecular potential energy.
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