NEET Chemistry Enthalpy Assertion Reason Question
Assertion (A): The standard enthalpy of combustion is always negative for a combustion reaction. | Reason (R): In a combustion reaction, reactants are converted to products in their standard states with the release of heat.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false.
Correct Answer
Detailed Explanation
According to the NCERT context, combustion reactions are exothermic, releasing heat, leading to a negative standard enthalpy of combustion.
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