1. Rusting of iron is an example of
- Physical change
- Chemical change
- Temporary change
- Reversible change
Correct Answer: Chemical change
2. Melting of ice is a
- Chemical change
- Physical change
- Irreversible change
- Complex change
Correct Answer: Physical change
3. Burning of a candle involves
- Only physical change
- Only chemical change
- Both physical and chemical changes
- Reversible change
Correct Answer: Both physical and chemical changes
4. Evaporation of water is
- Chemical change
- Biological change
- Irreversible change
- Physical change
Correct Answer: Physical change
5. The formation of curd from milk is a
- Physical change
- Reversible change
- Mechanical change
- Chemical change
Correct Answer: Chemical change
6. Dissolving salt in water is a
- Chemical change
- Reversible change
- Physical change
- No change
Correct Answer: Physical change
7. Digestion of food is
- Physical change
- Reversible change
- Temporary change
- Chemical change
Correct Answer: Chemical change
8. Boiling of water is a
- Chemical change
- Irreversible change
- Temporary change
- Physical change
Correct Answer: Physical change
9. Cutting of paper is a
- Chemical change
- Reversible change
- Permanent change
- Physical change
Correct Answer: Physical change
10. Burning of magnesium ribbon forms
- Magnesium oxide
- Magnesium chloride
- Hydrogen gas
- Carbon dioxide
Correct Answer: Magnesium oxide
11. Change of water into steam is
- Chemical change
- Reversible change
- Biological change
- Physical change
Correct Answer: Physical change
12. The rust formed on iron is
- Hydrated iron oxide
- Iron carbonate
- Ferric chloride
- Iron nitrate
Correct Answer: Hydrated iron oxide
13. The burning of wood produces
- Ash and gases
- Smoke only
- Carbon monoxide only
- Carbon dioxide only
Correct Answer: Ash and gases
14. Respiration in humans is a
- Physical change
- Reversible change
- Temporary change
- Chemical change
Correct Answer: Chemical change
15. A change in which a new substance is formed is
- Physical change
- Mechanical change
- Reversible change
- Chemical change
Correct Answer: Chemical change
16. Sublimation of camphor is
- Chemical change
- Reversible change
- Physical change
- Irreversible change
Correct Answer: Physical change
17. When ice cream melts, it is a
- Chemical change
- Reversible change
- Physical change
- Permanent change
Correct Answer: Physical change
18. Tarnishing of silver is due to
- Physical reaction
- Water absorption
- Evaporation
- Chemical reaction with sulfur
Correct Answer: Chemical reaction with sulfur
19. Photosynthesis is a
- Physical change
- Reversible change
- Temporary change
- Chemical change
Correct Answer: Chemical change
20. Condensation of water vapour is a
- Chemical change
- Irreversible change
- Biological change
- Physical change
Correct Answer: Physical change
21. When iron reacts with oxygen and moisture, it forms
- Rust
- Hydrogen
- Carbon dioxide
- Ozone
Correct Answer: Rust
22. Freezing of water is a
- Chemical change
- Irreversible change
- Permanent change
- Physical change
Correct Answer: Physical change
23. Digestion of food involves
- Physical change
- No change
- Reversible change
- Chemical change
Correct Answer: Chemical change
24. The burning of paper is
- Physical change
- Temporary change
- Reversible change
- Chemical change
Correct Answer: Chemical change
25. Mixing sand and salt is
- Chemical change
- Reversible change
- Physical change
- Irreversible change
Correct Answer: Physical change
26. Cooking of food is
- Physical change
- Temporary change
- No change
- Chemical change
Correct Answer: Chemical change
27. The change in color of copper vessels over time is due to
- Formation of copper carbonate
- Evaporation
- Physical polishing
- Rusting
Correct Answer: Formation of copper carbonate
28. Stretching of a rubber band is
- Chemical change
- Reversible change
- Physical change
- Permanent change
Correct Answer: Physical change
29. A candle melting is
- Chemical change
- Both
- Reversible change
- Physical change
Correct Answer: Physical change
30. A candle burning is
- Physical change
- Reversible change
- Temporary change
- Chemical change
Correct Answer: Chemical change
31. Breaking of glass is
- Chemical change
- Irreversible change
- Physical change
- Temporary change
Correct Answer: Physical change
32. The souring of milk is
- Physical change
- Temporary change
- Reversible change
- Chemical change
Correct Answer: Chemical change
33. Photosynthesis produces
- Glucose and oxygen
- Water and carbon dioxide
- Carbon and hydrogen
- Nitrogen and oxygen
Correct Answer: Glucose and oxygen
34. Making curd from milk is
- Physical change
- Temporary change
- No change
- Chemical change
Correct Answer: Chemical change
35. Boiling of egg is
- Physical change
- Reversible change
- Mechanical change
- Chemical change
Correct Answer: Chemical change
36. Iron nails kept in moisture get
- Rust
- Polished
- Bent
- Broken
Correct Answer: Rust
37. Chopping of vegetables is
- Chemical change
- Irreversible change
- Temporary change
- Physical change
Correct Answer: Physical change
38. Formation of clouds is
- Chemical change
- Reversible change
- Physical change
- Irreversible change
Correct Answer: Physical change
39. Fermentation of grapes is
- Physical change
- Temporary change
- Reversible change
- Chemical change
Correct Answer: Chemical change
40. Dissolution of sugar in water is
- Chemical change
- Reversible change
- Physical change
- Irreversible change
Correct Answer: Physical change
41. Explosion of firecrackers is
- Physical change
- Temporary change
- Reversible change
- Chemical change
Correct Answer: Chemical change
42. Condensation of steam is
- Chemical change
- Irreversible change
- Temporary change
- Physical change
Correct Answer: Physical change
43. A new substance is always formed in
- Physical change
- Mechanical change
- Reversible change
- Chemical change
Correct Answer: Chemical change
44. Grinding of wheat grains into flour is
- Chemical change
- Reversible change
- Physical change
- Temporary change
Correct Answer: Physical change
45. Stretching of spring is
- Chemical change
- Permanent change
- Irreversible change
- Physical change
Correct Answer: Physical change
46. Corrosion of metals is a
- Physical change
- Mechanical change
- Temporary change
- Chemical change
Correct Answer: Chemical change
47. Making of bread from dough is
- Physical change
- Temporary change
- Reversible change
- Chemical change
Correct Answer: Chemical change
48. Mixing iron filings and sulphur is
- Chemical change
- Reversible change
- Physical change
- Temporary change
Correct Answer: Physical change
49. Heating iron and sulphur together forms
- Iron sulphide
- Iron sulphate
- Iron oxide
- Sulphur dioxide
Correct Answer: Iron sulphide
50. A change which can be reversed is
- Chemical change
- Irreversible change
- Permanent change
- Physical change
Correct Answer: Physical change
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