Chapter-6 ➤ Physical and Chemical Changes

1. Which of the following is a chemical change?

 
 
 
 

2. Which is a method to prevent rust?

 
 
 
 

3. When you cut an apple with knife interactions between the apple and the knife take place.

 
 

4. How crystal of pure substances are obtained?

 
 
 
 

5. Iron pillar near the Qutub Minar in Delhi is famous for the following facts. Which of these facts is responsible for its long stability?

 
 
 
 

6. What will happen if carbon dioxide gas is passed through lime water ?

 
 
 
 

7. Galvanisation is a process used to prevent the rusting of which of the following?

 
 
 
 

8. What is the formula of rust?

 
 
 
 

9. The cooking of rice is a physical change.

 
 

10. Which among the following is a physical change?

 
 
 
 

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