Question 1
State three differences between physical and chemical changes.

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Solution

Four differences are :

Physical change

Chemical change

1. No new substances with new properties are formed.

1. New substances with new properties are formed.

2. It can be reversed by simple physical methods.

2. Change cannot be reversed by simple physical methods.

3. It is a temporary change.

3. It is a permanent change.

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Question 6.

Write any two differences between a chemical change and a physical change.

Question 6

Classify the following changes as physical and chemical changes:

Difference between physical change and chemical change with example

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Physical change	Chemical change
1. No new substances with new properties are formed.	1. New substances with new properties are formed.
2. It can be reversed by simple physical methods.	2. Change cannot be reversed by simple physical methods.
3. It is a temporary change.	3. It is a permanent change.