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SAI International School
Competency Based Worksheet
Subject – Chemistry
Chapter – Changes Around Us
Class- VI
Q. No. Questions
1. Which of the following is an example of a reversible physical change?
a) Boiling of water
b) Burning of a candle
c) Rusting of iron
d) Cooking of food
2. Which of the following is not a characteristic of a chemical change?
a) Formation of new substances
b) Change in color
c) Reversible
d) Change in temperature
3. Which of the following is an example of a reversible physical change?
a) Burning of paper
b) Rusting of iron
c) Dissolving common salt in water
d) Photosynthesis in plants
4. When a metal rim is heated and fitted onto a wooden wheel, it contracts upon cooling. This is
an example of:
a) Irreversible change
b) Undesirable change
c) Chemical change
d) Physical change
5. Which of the following is an example of a slow change?
a) Burning of a matchstick
b) Growth of a plant from a seed
c) Melting of ice
d) Dissolving salt in water
Choose the correct option for the following: (For questions- 6 and 7)
a) If both Assertion and Reason are correct and Reason is the correct explanation of
Assertion.
b) If both Assertion and Reason are correct, but Reason is not the correct explanation of
Assertion.
c) If Assertion is correct but Reason is incorrect.
d) If assertion is incorrect but Reason is correct.
e) If Assertion and Reason both are incorrect.
6. Assertion (A): The formation of rust is a chemical change.
