GK QUESTION#3367
What is the usual name for the burning process in which a substance reacts with oxygen and releases heat?
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Answer
C. Combustion
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Explanation
Combustion is the usual name for burning: an exothermic reaction of a substance with oxygen, often with a flame or glow. It is also a type of oxidation, but combustion is the more specific term requested here. Reduction involves electron gain, and sublimation is a physical change from solid directly to gas.