NEET Chemistry Enthalpy MCQ Question
Which of the following statements about enthalpy is correct?
In an exothermic reaction, the enthalpy change is negative.
Enthalpy is always a positive quantity for all reactions.
The enthalpy of all elements in their standard states is positive.
Endothermic reactions release heat to the surroundings.
Correct Answer
Detailed Explanation
In an exothermic reaction, heat is evolved, leading to a negative enthalpy change (∆H). This aligns with the NCERT context stating that q_p will be negative and ∆H will also be negative in such reactions.
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