Physics-Heat Engines
NEET Physics Heat Engines Assertion Reason Question
Type: Assertion Reason-assertion-Medium-Class 11
Assertion (A): In an exothermic reaction, the system loses heat to the surroundings. | Reason (R): The enthalpy change, ∆rH, is positive for exothermic reactions.
A
Both A and R are true, and R is the correct explanation of A.
B
Both A and R are true, but R is not the correct explanation of A.
C
A is true, but R is false.
D
A is false, and R is true.
Correct Answer
Option C
Detailed Explanation
In an exothermic reaction, heat is evolved, so the system loses heat to the surroundings, making ∆rH negative, not positive. Thus, R is false.
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