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- 1. Multiple Choice
What type of change is the bursting of a cracker ?
Reversible change
Irreversible change
Physical change
None of these
- 2. Multiple Choice
What type of change is the lighting of a bulb?
Reversible change
Irreversible change
Chemical change
None of these
- 3. Multiple Choice
Which of the following is a reversible change?
Rusting of iron
Hearing of iron
Baking of roti
Grinding of wheat in flour
- 4. Multiple Choice
Which of the following is an example of an irreversible change that takes place when heat is supplied?
Melting of ice
Transformation of water into vapour
Burning of coal
The expansion of iron
- 5. Multiple Choice
What type of changes are the blowing of balloon and it's bursting?
Both the changes are reversible
Reversible and irreversible .
Both the changes are irreversible
Irreversible and reversible
- 6. Multiple Choice
Which of the following is an irreversible change and does not require any heat?
Melting of wax
Roasting chappati
Burning of coal
Breaking glass bowl
- 7. Multiple Choice
Which of the following is an irreversible change?
Filling air in a balloon
Melting of ice
Burning of paper
Making a toy aeroplane by folding paper
- 8. Multiple Choice
Which type of change is the curdling of milk?
Reversible change
Irreversible change
Reversible as well as irreversible change
None of these
- 9. Multiple Choice
Which of the following changes takes place when heat is given?
The bursting of a balloon due to filling of excess air
Crushing of coal pieces
Transformation of water into vapour
Dissolving of salt in water
- 10. Multiple Choice
Which of the following changes takes when some other substance is mixed with the given substance?
Heating of iron
The grinding of wheat into flour
Curdling of milk
Folding a paper to make a paper boat
- 11. Multiple Choice
The burning of wood
Can be reversed
Cannot be reversed
Can be expanded
Can be melted
- 12. Multiple Choice
When iron rim is heated it
Contracts
Expands
Dissolves
Evaporates
- 13. Multiple Choice
When the iron blade is on the wooden handle it is fitted
By heating then cooling
By cooling then heating
By boiling then cooling
By freezing
- 14. Multiple Choice
Burning of a candle is
Only a physical change
Only a chemical change
Both physical and chemical change
None of these
- 15. Fill in the Blank
On heating ice , it gets converted into ________
- 16. Fill in the Blank
Iron _______ on heating
- 17. Fill in the Blank
When cold water is poured over a hot iron rim , it
- 18. Multiple Choice
The falling of leaves from trees is a reversible change
True
False
Neither true nor false
None
- 19. Multiple Choice
The burning of wood is an irreversible change
False
True
Neither true nor false
- 20. Multiple Choice
Rusting of iron is an irreversible change
False
True
Neither true nor false
- 21. Open Ended
What happens when an iron rod is heated?
- 22. Open Ended
Is the melting of ice a reversible change or an irreversible change?
- 23. Open Ended
After which type of change the object can be brought back to its original form?
- 24. Multiple Choice
Which of the following is an irreversible change that takes place when heat is provided to the system?
Melting of ice
Transformation of water into steam
Burning of coal
The expansion of iron
- 25. Multiple Choice
Which of the following is a reversible change?
burning of forests
Ripening of fruits
burning of candle
Melting of ice
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