Question

Define physical and chemical changes. Give examples.

Answer 1

Answer:

Physical change is the change in size,shape,colour,etc.

Chemical change is the change in temperature or a evaluation of gas,etc.

Example: chopping of wood is a physical change.

Burning of wood is a chemical change.

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Answer 2

Answer:

Physical change: It is a temporary change in which only physical properties of a substance change. It can be easily reversed.

Physical change: It is a temporary change in which only physical properties of a substance change. It can be easily reversed.Examples: Melting of ice, glowing of an electric bulb.

Physical change: It is a temporary change in which only physical properties of a substance change. It can be easily reversed.Examples: Melting of ice, glowing of an electric bulb.Chemical change: It is a permanent change in which the chemical properties of a substance change. It is non-reversible.

Physical change: It is a temporary change in which only physical properties of a substance change. It can be easily reversed.Examples: Melting of ice, glowing of an electric bulb.Chemical change: It is a permanent change in which the chemical properties of a substance change. It is non-reversible.Examples: Digestion of food, growth of a plant.