NEET Chemistry Enthalpy Match the Following Question
Match Column-I with Column-II.
| Column-I | Column-II |
|---|---|
| (a) Exothermic reaction | (i) ∆ r H = +33.2 kJ mol –1 |
| (b) Endothermic reaction | (ii) ∆ r H = –285.8 kJ mol –1 |
| (c) Heat evolved | (iii) ∆ r H < 0 |
| (d) Heat absorbed | (iv) ∆ r H > 0 |
a-ii, b-i, c-iii, d-iv
a-i, b-ii, c-iv, d-iii
a-iii, b-iv, c-i, d-ii
a-iv, b-iii, c-ii, d-i
Correct Answer
Detailed Explanation
In an exothermic reaction, heat is evolved, leading to a negative enthalpy change (∆ r H < 0), which corresponds to ∆ r H = –285.8 kJ mol –1 for water formation. Conversely, an endothermic reaction absorbs heat (∆ r H > 0).
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