What is the difference between the mechanical chewing of food and its chemical digestion?
Answer and explanation
Correct answer: Chewing reduces the size of food pieces, whereas chemical digestion forms new simpler substances.
During mechanical chewing, food is broken into smaller pieces; its size and surface area change, but no new substance is formed. In chemical digestion, enzymes convert complex food substances into simpler substances, so new substances are formed. Therefore, option A is correct; option C is incorrect because chemical digestion is not merely a physical change.
Frequently asked questions
What is the correct answer to this question?
Chewing reduces the size of food pieces, whereas chemical digestion forms new simpler substances.
Why is this the correct answer?
During mechanical chewing, food is broken into smaller pieces; its size and surface area change, but no new substance is formed. In chemical digestion, enzymes convert complex food substances into simpler substances, so new substances are formed. Therefore, option A is correct; option C is incorrect because chemical digestion is not merely a physical change.
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.
