Question

what is physical Change and chemical change

Answer 1

A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.


Melting a sugar cube is a physical change because the substance is still sugar. Burning a sugar cube is a chemical change. Fire activates a chemical reaction between sugar and oxygen. The oxygen in the air reacts with the sugar and the chemical bonds are broken

Answer 2

Heya guys.......
CHEMICAL CHANGE::::
Those reaction in which new substance are formed........
and this change is irreversible .
Example......
1 .souring of milk
2. burning of candle with wax
3. digestion of food...
and many more example in our daily life...

PHYSICAL CHANGE::::::::
Thos reaction in which no new substance are formed...
and it is reversible change...
Example....
1. melting of ice....
2. burning of candle without wax.
3. boiling of water

hopes it will help u