Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: The enthalpy of formation of gaseous oxygen molecules at 298 K and under a pressure of one atmosphere is zero. Reason: The entropy of formation of gaseous oxygen molecule under the same conditions is zero.A) If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion:
B) If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion:
C) If Assertion: is true but Reason: is false
D) If both Assertion: and Reason: are false
Correct Answer: C
Solution :
Standard enthalpy of formation of gaseous oxygen molecule is zero. Entropy of formation of even elementary substances at 298 K and one atmosphere is not zero.
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