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A reaction that releases heat to the surroundings is called:
A{'text': 'An endothermic reaction'}
B{'text': 'An exothermic reaction'}
C{'text': 'A photochemical reaction'}
D{'text': 'A reversible reaction'}
Answer & Solution
Correct answer: B. {'text': 'An exothermic reaction'}
1. Reactions are grouped by the heat exchange that accompanies them.
2. If heat is **released** to the surroundings the reaction is called **exothermic**.
3. Example: C + O₂ → CO₂ + heat.
4. Endothermic reactions absorb heat instead of releasing it.
_Source: Selina Concise ICSE Class 8 Chemistry Ch 6 "Chemical Reactions", Exothermic vs endothermic_
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