This chapter helps students understand the difference between physical and chemical changes with real-life examples. These concepts build a foundation for advanced science learning covering wide variety of topics like melting ice to rusting iron. Solve the following MCQs to test your knowledge and strengthen your understanding of this topic.
MCQ Questions for Class 7 Science Chapter 5 Changes Around Us: Physical and Chemical with Answers
Question 1: Which of the following is a physical change?
a) Burning of wood
b) Rusting of iron
c) Melting of ice
d) Cooking of rice
Answer:
c) Melting of ice — It is a reversible physical change.
Question 2: Which of the following is a chemical change?
a) Tearing paper
b) Freezing water
c) Rusting of iron
d) Melting wax
Answer:
c) Rusting of iron — A new substance is formed.
Question 3: Which change is reversible?
a) Burning of paper
b) Melting of butter
c) Cooking of food
d) Rusting of iron
Answer:
b) Melting of butter — It can be changed back on cooling.
Question 4: The digestion of food is an example of:
a) Physical change
b) Chemical change
c) Both physical and chemical change
d) None of these
Answer:
b) Chemical change — New substances are formed.
Question 5: Which of the following changes is NOT a physical change?
a) Dissolving sugar in water
b) Evaporation of water
c) Breaking of glass
d) Burning of coal
Answer:
d) Burning of coal — It produces new substances like ash and gases.
Question 6: Which of these changes is desirable?
a) Spoilage of food
b) Burning of house
c) Ripening of fruit
d) Rusting of iron
Answer:
c) Ripening of fruit — It makes the fruit edible.
Question 7: Condensation of steam is an example of:
a) Physical change
b) Chemical change
c) Both
d) None
Answer:
a) Physical change — Only state of matter changes.
Question 8: Which of the following is a chemical reaction?
a) Boiling water
b) Lighting a matchstick
c) Cutting cloth
d) Melting ice
Answer:
b) Lighting a matchstick — It involves chemical reaction with oxygen.
Question 9: Which of the following is an irreversible change?
a) Melting chocolate
b) Grinding wheat into flour
c) Burning of candle wax
d) Freezing water
Answer:
c) Burning of candle wax — Cannot be reversed.
Question 10: Which one is a physical change?
a) Ripening of mango
b) Souring of milk
c) Boiling of water
d) Burning of wood
Answer:
c) Boiling of water — Only the state changes.
Question 11: Rusting of iron occurs due to the presence of:
a) Oxygen only
b) Water only
c) Both oxygen and water
d) Carbon dioxide
Answer:
c) Both oxygen and water — Both are necessary for rusting.
Question 12: Which of the following is a slow change?
a) Explosion of firecracker
b) Melting of ice
c) Rusting of iron
d) Lighting a candle
Answer:
c) Rusting of iron — It takes days or months.
Question 13: Which of the following is a fast change?
a) Germination of seed
b) Burning of matchstick
c) Growth of tree
d) Rusting of iron
Answer:
b) Burning of matchstick — It occurs within seconds.
Question 14: Cutting of vegetables is:
a) A chemical change
b) A physical change
c) Both
d) None
Answer:
b) A physical change — No new substance is formed.
Question 15: Souring of milk is:
a) A physical change
b) A chemical change
c) Both
d) None
Answer:
b) A chemical change — New substances like lactic acid form.
Question 16: Formation of curd from milk is:
a) Physical change
b) Chemical change
c) Reversible change
d) None
Answer:
b) Chemical change — New substance (curd) is formed.
Question 17: Which of the following is NOT an irreversible change?
a) Tearing a page
b) Burning wood
c) Boiling water
d) Souring milk
Answer:
c) Boiling water — It can be condensed back.
Question 18: Which one is NOT a physical property?
a) Shape
b) Size
c) Colour
d) Burning
Answer:
d) Burning — It is a chemical change.
Question 19: The change of water into ice is:
a) Irreversible physical change
b) Reversible physical change
c) Irreversible chemical change
d) None
Answer:
b) Reversible physical change — It can melt back into water.
Question 20: Which of the following is a chemical property?
a) Solubility in water
b) Boiling point
c) Ability to rust
d) Melting point
Answer:
c) Ability to rust — It involves chemical reaction.
Question 21: Which change is usually accompanied by energy release?
a) Physical change
b) Chemical change
c) Both
d) None
Answer:
b) Chemical change — Example: Burning wood releases heat.
Question 22: Which change occurs when iron and sulphur are heated together?
a) Physical change
b) Chemical change
c) Reversible change
d) None
Answer:
b) Chemical change — Iron sulphide is formed.
Question 23: When butter is heated, it melts. This is:
a) Chemical change
b) Physical change
c) Irreversible change
d) None
Answer:
b) Physical change — No new substance is formed.
Question 24: Which one shows both physical and chemical change?
a) Burning of candle
b) Cutting of paper
c) Melting of wax
d) Boiling water
Answer:
a) Burning of candle — Wax melts (physical) and burns (chemical).
Question 25: Which of the following is not a chemical reaction?
a) Cooking rice
b) Burning LPG
c) Dissolving salt in water
d) Rusting iron
Answer:
c) Dissolving salt in water — It is physical change.
Question 26: Heating of iron rod until it glows is:
a) Physical change
b) Chemical change
c) Irreversible change
d) None
Answer:
a) Physical change — Only colour changes due to heating.
Question 27: Which of the following represents an irreversible change?
a) Condensation
b) Freezing
c) Burning
d) Melting
Answer:
c) Burning — It forms new substances.
Question 28: Cutting of trees is:
a) Reversible change
b) Irreversible change
c) Both
d) None
Answer:
b) Irreversible change — Trees cannot regrow in the same way.
Question 29: Expansion of metal on heating is:
a) Physical change
b) Chemical change
c) Irreversible change
d) None
Answer:
a) Physical change — It contracts again on cooling.
Question 30: Which of these is an example of a chemical change?
a) Melting of ice
b) Boiling of water
c) Cooking of vegetables
d) Breaking a glass
Answer:
c) Cooking of vegetables — New substances are formed.
Question 31: Sublimation of camphor is an example of:
a) Physical change
b) Chemical change
c) Irreversible change
d) None
Answer:
a) Physical change — Camphor changes directly into vapour.
Question 32: Which change is NOT desirable?
a) Baking a cake
b) Germination of seeds
c) Rusting of iron
d) Cooking food
Answer:
c) Rusting of iron — It damages the metal.
Fill in the Blanks Questions for Class 7 Science Chapter 5 Changes Around Us: Physical and Chemical
1. The change of water into ice is a ___ change.
Answer:
Physical
2. Burning of paper is an example of a ___ change.
Answer:
Chemical
3. Rusting of iron needs both ___ and ___.
Answer:
Air and moisture
4. Evaporation of water is a ___ change.
Answer:
Physical
5. Formation of curd from milk is a ___ change.
Answer:
Chemical
6. Changes which can be reversed are called ___ changes.
Answer:
Reversible
7. Changes which cannot be reversed are called ___ changes.
Answer:
Irreversible
8. Cutting of wood into small pieces is a ___ change.
Answer:
Physical
9. Cooking of food is a ___ change.
Answer:
Chemical
10. A change in which a new substance is formed is called a ___ change.
Answer:
Chemical
11. Melting of wax is a ___ change but burning of wax is a ___ change.
Answer:
Physical, Chemical
12. When water vapour changes into liquid on cooling, the process is called ___.
Answer:
Condensation
13. Souring of milk is an example of a ___ change.
Answer:
Chemical
14. Heating of iron rod until it becomes red hot is a ___ change.
Answer:
Physical
15. Explosion of firecrackers is a ___ change.
Answer:
Chemical
Class 7 Science MCQ
- MCQ on The Ever-Evolving World of Science for Class 7
- MCQ on Exploring Substances: Acidic, Basic, and Neutral for Class 7
- MCQ on Electricity: Circuits and their Components for Class 7
- MCQ on The World of Metals and Non-metals for Class 7
- MCQ on Adolescence: A Stage of Growth and Change for Class 7
- MCQ on Heat Transfer in Nature for Class 7
- MCQ on Measurement of Time and Motion for Class 7
- MCQ on Life Processes in Animals for Class 7
- MCQ on Life Processes in Plants for Class 7
- MCQ on Light: Shadows and Reflections for Class 7
- MCQ on Earth, Moon, and the Sun for Class 7
