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- 1. Multiple Choice
Which among the following is a physical change?
cutting a log
burning a wood
ripening of fruit
cooking of food
- 2. Multiple Choice
Which of the following statements is true?
Setting of milk to form curd is a chemical change and reversible change.
Spoiling of food is a chemical and irreversible change.
Burning of paper is a physical and reversible change.
Boiling of an egg is a physical and reversible change.
- 3. Multiple Choice
Study the venn diagram. What does centre point X represents?
making paper boat
Burning crackers
Blowing a balloon
rusting of a bicycle
- 4. Multiple Choice
Which change represents point 1?
Evaporation of water
chopping of vegetables
Burning of wood
setting of milk
- 5. Multiple Choice
Which change represents point 2?
bursting of balloon
condensation of water
tearing a paper
setting of Plaster of Paris
- 6. Multiple Choice
Which change represents point 3?
tearing of paper
burning of LPG gas
bursting of cracker
melting of wax.
- 7. Multiple Choice
Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a –
a physical change that can be reversed.
the chemical change that can be reversed.
a physical change that cannot be reversed.
the chemical change that cannot be reversed.
- 8. Multiple Choice
Which of the following statement is incorrect for a chemical reaction?
Heat may be given out but never absorbed.
The sound may be produced.
A colour change may take place.
A gas may be evolved.
- 9. Multiple Choice
Iron pillar near the Qutub Minar in Delhi is famous for the following facts. Which of these facts is responsible for its long stability?
It is more than 7 metres high.
It weighs about 6000 kg.
It was built more than 1600 years ago.
It has not rusted after such a long period.
- 10. Multiple Choice
Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and a then a small amount of hot water was added to dissolve it (step I). On cooling, beautiful blue coloured crystals got separated (step II). Step I and Step II are:
physical and chemical changes, respectively.
chemical and physical changes, respectively.
both physical change.
both chemical change.
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