Why can combustion and respiration be considered similar on the basis of energy?
Answer and explanation
Correct answer: Both processes release energy
In combustion, oxidation of a fuel releases energy as heat and often as light. In respiration, glucose undergoes controlled oxidation and releases energy, which is used to form ATP. Hence, both are energy-releasing, or exothermic, processes. Option B is incorrect because there is no net absorption of energy, and option D is incorrect because respiration does not release energy as light. Exam tip: A reaction with an overall release of energy is identified as exothermic.
Frequently asked questions
What is the correct answer to this question?
Both processes release energy
Why is this the correct answer?
In combustion, oxidation of a fuel releases energy as heat and often as light. In respiration, glucose undergoes controlled oxidation and releases energy, which is used to form ATP. Hence, both are energy-releasing, or exothermic, processes. Option B is incorrect because there is no net absorption of energy, and option D is incorrect because respiration does not release energy as light. Exam tip: A reaction with an overall release of energy is identified as exothermic.
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.
