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- 1. Multiple Choice
Which of these is a reversible Change?
Melting of wax
Milk turning into curd
Burning of wax
Rusting of iron
- 2. Multiple Choice
Chemical changes are
Always reversible
Mostly reversible
Always irreversible
Mostly irreversible
- 3. Multiple Choice
Growth in plants and animals is
Physical change
Chemical change
Neither physical nor chemical change since it is a life process
Either a physical change or a chemical change depending on how much the growth is
- 4. Multiple Choice
Cooking is
Physical change
Chemical change
- 5. Multiple Choice
Which of these is a physical and irreversible change
Evaporation of water
Breaking of a glass tumbler
Burning of paper
Lighting of an electric bulb
- 6. Multiple Choice
Dissolving sugar in water is a
Chemical change
Physical change
- 7. Multiple Choice
Changing milk into curd
Reversible
Irreversible
- 8. Multiple Choice
Melting boiling evaporation and condensation are
Physical change
Chemical change
- 9. Multiple Choice
Change of state is
An irreversible change
Reversible Change
- 10. Multiple Choice
New substances With different molecules get formed in a physical change
False
True
- 11. Multiple Choice
Washing soda + lemon juice---carbon dioxide + other components.
in this chemical reaction washing soda and lemon juice are
Products
Reactants
None of these
Both products as well as reactants
- 12. Multiple Choice
when heated air in the balloon expands
True
False
- 13. Multiple Choice
All physical changes are reversible
True
False
- 14. Multiple Choice
Chemical changes are mostly reversible and temporary
True
False
- 15. Multiple Choice
Freezing of water is
Reversible Change
Irreversible
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