Question

define what is physical changes and chemical change ?
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Answer 1

Physical Change

1. Can be reversed

2. No new substances are formed

3. Ex- Tearing a paper

Chemical Change

1. Can't be reversed

2. New substances are formed

3. Ex- Digestion of food

Answer 2

Answer:

Physical change is a change which can be reversed .

For example, Cutting a tree log, even though the shape and size changes the Nature of the material remains same.

Chemical change is a change which cannot be reversed.

For example, turning milk into curd. Here nature of the material has changed.