Question

What is a physical change ? Write four properties of it ?

Answer 1

Answer:

physical change is that which is reversible.

cutting of trees,tearing of paper etc.

Answer 2

A physical simply means change in the physical state of a substance. There is no change otherwise. A common example is the change physical state of water. Water when heated, turns into water vapour. But can still be converted to liquid state. So, a physical change just involves the external physical state of an object.

A physical change has many properties:-

• It is reversible. Since, it is only a change in physical state and chemically nothing is changed.
• No new substances are formed. Again, it's only changing in the physical state and there are no new substances formed.
• It is a temporary change, since its reversible. But a chemical change is permanent.
• The substance retains its chemical properties.