MCQ
Which of the following reactions is exothermic ?
- A$H _{2(g)} \rightarrow 2 H _{( g )}$
- B$C(s) \rightarrow C_{(g)}$
- ✓$2 Cl _{( g )} \rightarrow Cl _{2(g)}$
- D$H _2 O _{(s)} \rightarrow H _2 O _{(l)}$
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