Which of the following are chemical changes?
I. cooking of food
II. digestion of food
III. freezing of water
IV. water is heated up
I and II
I, II, and III
III and IV
all of the above
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Discussions (11)
Some chemical change examples in our everyday life are mentioned below.
Burning of paper and log of wood.
Digestion of food.
Boiling an egg.
Chemical battery usage.
Electroplating a metal.
Baking a cake.
Milk going sour.
Various metabolic reactions that take place in the cells.
A is very much correct.
cooking of food and digestion of food are chemical change
cooking of food and digestion of food are irreversible there for making it a chemical change
chemical change is a transformation in which a substance undergoes a chemical reaction to form a new substance with different properties. Cooking of food and digestion of food are examples of chemical changes because the chemical composition of the food changes as it is cooked or digested.
III and IV are both physical changes which involves the changes in the state of water.. leaving behind I and II which are chemical changes involving the formation of new substances
