2002 · Q32
Combustion of a candle is a
General ScienceChemistry
- APhotochemical reaction
- BExothermic reaction
- CPhysical change
- DEndothermic reaction
Explanation
Burning a candle is a combustion reaction that releases heat and light into the surroundings — the defining feature of an exothermic reaction. It is not photochemical (A), since light drives it rather than being absorbed to drive it; it is a chemical change, not merely physical (C); and it is not endothermic (D), which would absorb heat. Hence (B) is correct.