Question

State the basic difference between a physical and a chemical change. Class10

Answer 1

Answer:

• physical change : it is a reversible process
• no new products are formed
• no heat energy is released
• chemical properties of a substance does not change

Eg : Glowing of bulb

• Chemical change : it is a irreversible process
• new products with new chemical properties are formed
• heat energy is released
• chemical properties of a substance changes

eg : Digestion of food

Answer 2

Answer:

the changes done physically and not any chemical reaction takes place that is physical change. and in which a chemical reaction takes place that is chemical change.