Question

two differences between the following: (4)

i) Physical change and chemical change.​

Answer 1

Answer

Two differences between the following :

Physical Change

• No new substances formed.
• It is a temporary change.

Chemical Change

• New substances formed.
• It is a permanent change.

Examples of changes :

• Physical Change : Melting of ice , Breaking a glass , Boiling of water, Mixture of sand and water. Dissolving of sugar and water , tearing of a paper , melting of wax etc.

• Chemical Change : Ripening of fruits , cooking of food. Rotting of vegetables, Burning of paper etc

Answer 2

Physical Change :

• A change in which a substance undergoes a change in its physical
• properties, which is generally reversible is known as Physical change.
• In Physical change no new substance
• is formed

Eg : Tearing a piece of paper.

Chemical change :

• A change in which one or more new substances are formed is called a
• Chemical change.
• It is generally a Irreversible change.

Eg : Burning of Magnesium ribbon.

Know more :

⭐ Examples of Chemical Changes

• Photosynthesis
• Burning of coal
• Digestion of food
• Rotting of Food
• Milk turning Sour

⭐ Examples of Physical Changes

• Dissolving sugar in water
• Beating aluminium to make aluminium foil
• Melting of wax
• Cutting paper
• Breaking Glass Cups