In a combustion reaction, energy is generally released in which form?
Answer and explanation
Correct answer: Heat and light
Combustion is an exothermic oxidation reaction. When a fuel reacts with oxygen, chemical energy stored in the fuel is converted mainly into heat and often into visible light, such as the flame of a candle. Oxygen is a reactant consumed during combustion, not a form in which energy is released. Thus options B, C, and D confuse a reactant with energy output. Option A is correct.
Frequently asked questions
What is the correct answer to this question?
Heat and light
Why is this the correct answer?
Combustion is an exothermic oxidation reaction. When a fuel reacts with oxygen, chemical energy stored in the fuel is converted mainly into heat and often into visible light, such as the flame of a candle. Oxygen is a reactant consumed during combustion, not a form in which energy is released. Thus options B, C, and D confuse a reactant with energy output. Option A is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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