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- 1. Multiple Choice
Which Of The Following Changes Can Be Reversed?
Burning of a candle.
Making biogas from cow dung.
Drying of wet cloth.
Baking cake in an oven.
- 2. Multiple Choice
Consider The Following Sentences And Choose The Reversible Changes
Changing of bread into toast.
Chemical change.
Melting of wax.
None of the above
- 3. Multiple Choice
An Iron Ring Is Heated. Which Of The Following Statement About It Is Incorrect?
The ring expands
The ring almost comes to the same size on cooling
The change in this case is reversed
The ring changes its shape and the change cannot be reversed
- 4. Multiple Choice
Payal Is Writing Some Sentences About Changes. Choose The Statement Where You Can Say That The Statements Is Incorrect About Changes:
The increase in size on heating is called expansion.
The iron rims are fitted around wooden wheel by the process of expansion.The decrease in size of an object on cooling is called contraction.
The decrease in size of an object on cooling is called contraction.
On cooling the hot ring of spade (blade) expands and becomes little smaller in size.
- 5. Multiple Choice
What is irreversible change ?
A change which cannot be reversed
A change which can be reversed
both
none of these
- 6. Multiple Choice
To obtain salt which of these methods is used ?
Condensation
Precipitation
Evaporation
Transpiration
- 7. Multiple Choice
On heating a substance it _______
Expands
Contracts
Breaks
Freezes
- 8. Multiple Choice
A change differs by it's
Shape
All of these
Colour
Size
- 9. Multiple Choice
Melting of ice is a
irreversible
Reversible
Chemical Change
None of these
- 10. Multiple Choice
Which Of The Following Changes Cannot Be Reversed?
Blowing of a balloon.
Folding a paper to make a toy Aeroplane.
Rolling a ball of dough to make roti.
Baking cake in an oven.
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