Which of the following are chemical changes?
(a) Growth of a plant
(b) Rusting of iron
(c) Mixing of iron filings and sand
(d) Cooking of food
(e) Digestion of food
(f) Freezing of water
(g) Burning of a candle.
Answer
Physical Change - A change in which no new substance is formed is called Physical Change
These changes are reversible.
Chemical Change - A change in which new substances are formed is called Chemical Change
These changes are normally irreversible
The following are chemical changes
- (a) Growth of a plant
- (b) Rusting of iron
- (d) Cooking of food
- (e) Digestion of food
- (g) Burning of a candle.
