Chemistry
Grade-6
Easy
Question
Burning of candles, digestion of food, etc., are the examples of which change?
- Physical change
- Chemical change
- Both a and b
- None of these
Hint:
Chemical changes involve chemical reactions.
The correct answer is: Chemical change
- Physical changes are reversible and do not produce a new substance.
- Chemical changes are irreversible, involves chemical reaction and a new substance is formed.
- When a candle is burnt wax is used up to give light and carbon dioxide is produced.
- During the digestion of food, food particles are broken into small pieces and it reacts with enzymes to convert them into absorbable form for the body.
- Burning of candles, and digestion of food are examples of chemical change.
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