Why are combustion and respiration placed in the same category on the basis of energy change?
Answer and explanation
Correct answer: Both release energy
In combustion, oxidation of a fuel releases energy, mainly as heat and often as light. In respiration, glucose undergoes controlled oxidation and releases energy for life processes. Therefore, both are exothermic processes. In contrast, a requirement for light is associated with processes such as photosynthesis, not with both combustion and respiration.
Frequently asked questions
What is the correct answer to this question?
Both release energy
Why is this the correct answer?
In combustion, oxidation of a fuel releases energy, mainly as heat and often as light. In respiration, glucose undergoes controlled oxidation and releases energy for life processes. Therefore, both are exothermic processes. In contrast, a requirement for light is associated with processes such as photosynthesis, not with both combustion and respiration.
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.
