Question

Answer the following
Distinguish between
physical change and chemical change​

Answer 1

Answer:

In a physical change, the molecules are rearranged while their actual composition remains same. In a chemical change, the molecular composition of a substance completely changes and a new substance is formed. Some example of physical change are freezing of water, melting of wax, boiling of water, etc.

Answer 2

Answer:

Physical Change

• In a physical change, the molecules are rearranged while their actual composition remains same.
• Some example of physical change are freezing of water, melting of wax, boiling of water, etc
• Physical change is easily reversible i.e original substance can be recovered.
• In physical change, no new substance is formed.

Chemical Change

• In a chemical change, the molecular composition of a substance completely changes and a new substance is formed.

• A few examples of chemical change are digestion of food, burning of coal, rusting, etc.
• Chemical change is irreversible i.e. original substance cannot be recovered.

• A chemical change is always accompanied by one or more new           substance(s).