Changes Around Us: Physical and Chemical Part 1: MCQs (Q1–Q25)
📘 Chapter 5 – Changes Around Us: Physical and Chemical
🔹 Part 1: Types of Changes (Q1–Q25)
Q1. Melting of ice is an example of:
A) Physical change
B) Chemical change
C) Both physical and chemical change
D) No change
✅ Answer: A) Physical change
Explanation:
- (A) Physical → Ice changes to water, no new substance formed (Correct).
- (B) Chemical → Not involved.
- (C) Both → Incorrect.
- (D) No change → Wrong, change occurs.
Q2. Burning of paper is an example of:
A) Physical change
B) Chemical change
C) Both
D) No change
✅ Answer: B) Chemical change
Explanation:
- Produces ash, carbon dioxide, new substances → irreversible chemical change.
Q3. Which of the following is a reversible change?
A) Rusting of iron
B) Melting of wax
C) Burning of candle
D) Cooking rice
✅ Answer: B) Melting of wax
Q4. Which of the following is a chemical change?
A) Breaking of glass
B) Boiling water
C) Digestion of food
D) Dissolving sugar
✅ Answer: C) Digestion of food
Q5. Freezing of water is:
A) Physical change
B) Chemical change
C) Both
D) Irreversible change
✅ Answer: A) Physical change
Q6. Which of these is irreversible?
A) Melting of ice
B) Stretching of rubber
C) Tearing of paper
D) Dissolving salt in water
✅ Answer: C) Tearing of paper
Q7. Dissolving sugar in water is:
A) Physical change
B) Chemical change
C) Both
D) Irreversible
✅ Answer: A) Physical change
Q8. Which of the following is not a chemical change?
A) Burning of coal
B) Cooking of food
C) Rusting of iron
D) Melting of butter
✅ Answer: D) Melting of butter
Q9. The glowing of a bulb is a:
A) Chemical change
B) Physical change
C) Both
D) None
✅ Answer: B) Physical change
Q10. Which change produces new substances?
A) Physical change
B) Chemical change
C) Both
D) None
✅ Answer: B) Chemical change
Q11. Evaporation of water is:
A) Physical change
B) Chemical change
C) Both
D) Irreversible
✅ Answer: A) Physical change
Q12. Which of these is a slow change?
A) Rusting of iron
B) Burning of candle
C) Explosion of cracker
D) Lightning
✅ Answer: A) Rusting of iron
Q13. Which of these is a fast change?
A) Ripening of fruits
B) Growing of plants
C) Burning of matchstick
D) Rusting of iron
✅ Answer: C) Burning of matchstick
Q14. Which of these is reversible?
A) Evaporation of water
B) Burning of wood
C) Rusting of iron
D) Cooking an egg
✅ Answer: A) Evaporation of water
Q15. Which of the following is an example of expansion due to heat?
A) Iron rod in railway track gaps
B) Melting ice
C) Dissolving sugar
D) Breaking glass
✅ Answer: A) Iron rod in railway track gaps
Q16. Which of these is a periodic change?
A) Earth’s rotation
B) Burning of wood
C) Cooking rice
D) Melting of ice
✅ Answer: A) Earth’s rotation
Q17. Which is NOT a periodic change?
A) Tides
B) Seasons
C) Day and night
D) Rusting of iron
✅ Answer: D) Rusting of iron
Q18. Which of these is NOT a reversible change?
A) Melting ice cream
B) Freezing water
C) Cooking food
D) Boiling water
✅ Answer: C) Cooking food
Q19. Physical changes are generally:
A) Reversible
B) Irreversible
C) Both
D) None
✅ Answer: A) Reversible
Q20. Chemical changes are generally:
A) Reversible
B) Irreversible
C) Both
D) None
✅ Answer: B) Irreversible
Q21. Dissolving salt in water is:
A) Physical change
B) Chemical change
C) Both
D) None
✅ Answer: A) Physical change
Q22. Condensation of water vapour is:
A) Physical change
B) Chemical change
C) Both
D) None
✅ Answer: A) Physical change
Q23. Which is an irreversible change?
A) Breaking glass
B) Melting ice
C) Stretching rubber
D) Evaporation of water
✅ Answer: A) Breaking glass
Q24. Explosion of crackers is:
A) Physical change
B) Chemical change
C) Both
D) Reversible
✅ Answer: B) Chemical change
Q25. Which of the following shows both physical and chemical changes?
A) Burning of candle
B) Melting wax
C) Tearing paper
D) Boiling water
✅ Answer: A) Burning of candle
Explanation: Candle wax melts (physical) and burns (chemical).
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