Chemistry
Grade-10
Easy
Question
Which of the following is a chemical change ?
- Using chalk
- Water freezing
- Slicing cheese
- Digestion
Hint:
A chemical change is a change of materials into another, new materials with different properties, and one or more than one new substance are formed.
The correct answer is: Digestion
Food digestion is considered as a chemical change.
- When new, smaller substances are formed during digestion, food undergoes chemical modification.
- Chemical digestion can be seen in these chemical changes.
- Salivary enzymes start to digest large macromolecules into simpler molecules i.e. carbohydrates in the mouth, which triggers the start of chemical digestion.
- The small intestine is where most chemical changes in digestion take place.
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