SUBSTANCES, THEIR PROPERTIES AND CLASSIFICATIONS
Understanding Chemical and Physical Changes Quiz
Test your knowledge on the properties and classifications of substances with this engaging quiz! Explore the differences between chemical and physical changes, and discover fascinating facts about reactions and transformations that occur in our everyday life.
What you will learn:
- Key concepts in chemistry
- Identifying chemical vs. physical changes
- Recognizing properties of substances
1. A chemical change is different than a physical change because in a chemical change
A) Chemicals are used
B) Molecules do not physically touch
C) A new substance is formed and in a physical change no new substance is formed
D) The change can be seen but in a physical change it cannot
2. Properties like size, shape, colour, state of a substance are
A) chemical properties
B) mental properties
C)physical properties
D) physico-chemical properties
3. A substance that has uniform chemical properties are called:
A) Impurities
B) pure substance
C) mixture
D) matter
4. A physical change is generally
(a) reversible
(b) irreversible
(c) considerable
(d) all of these
5. During a physical change, a substance undergoes a change in its ......................
(a) physical properties
(b) chemical properties
(c) both (a) and (b)
(d) none of these
6. Rusting of iron is a
(a) physical change
(b) chemical change
(c) both (a) and (b)
(d) all of these
7. Rusting occurs when iron is exposed to
(a) oxygen and water
(b) soil and rain
(c) breeze and sunlight
(d) salt water and clouds
8. A chemical change is also called a
(a) chemical reaction
(b) rusting
(c) both (a) and (b)
(d) all of these
9. Burning of any substance is a/an
(a) physical change
(b) chemical change
(c) irreversible change
(d) both (b) and (c)
10. Which among the following is a physical change?
(a) Burning of wood
(b) Ripening of fruit
(c) Cutting a log of wood in small pieces
(d) Cooking of food
11. Which of the following is a chemical change?
(a) Germination of seeds
(b) Cutting a piece of paper
(c) Bursting of fire crackers
(d) Both (a) and (c)
12. A chemical change may bring
(a) evolution of gas
(b) change in colour
(c) change in taste
(d) all of these
13. Which is the formula of ozone?
(a) Fe2O3
(b) Fe3O2
(c) O2
(d) O3
14. A change of state from one form to another is a
(a) physical change
(b) chemical change
(c) biological change
(d) state variation
15. Which of the following is an example of a physical change?
(a) Mixing of baking soda and vinegar together to cause bubbles and foam.
(b) Falling of a glass cup from the counter and its shattering on the ground.
(c) Lighting a piece of paper on fire causing it to bum up and leave ashes.
(d) Baking a birthday cake for your mother.
16. Which of the following is an example of a chemical change?
(a) Filling up a balloon with hot air
. (b) Taking a glass of water and freezing it by placing it in the freezer.
(c) A plant collecting sunlight and turning it into food.
(d) Your dog ripping up your homework.
17. Which property stays the same during physical and chemical changes?
(a) Density
(b) Shape
(c) Mass
(d) Arrangement of particles
18. Which of the following changes can easily be reversed?
(a) Chemical Change
(b) Physical Change
(c) Both physical and chemical changes
(d) Neither physical nor chemical change
19. When a new substance is formed with different properties than those of the original substance, it is called a
(a) chemical change
(b) physical change
(c) freezing
(d) boiling
20. If the chemical properties of a substance remain unchanged and its appearance or shape changes, it is called a
(a) chemical change
(b) physical change
(c) both physical and chemical changes
(d) neither physical nor chemical change
21.Which of the following is an example of a physical change?
(a) Metal rusting
(b) Silver tarnishing
(c) Water boiling
(d) Paper burning
22. Which characteristic best describes a physical change?
(a) Composition changes
(b) Composition stays the same
(c) Form stays the same
(d) Mass is lost
23. Which of the following is a chemical change?
(a) Freezing of water
(b) Cutting of wood
(c) Baking of bread
(d) Bending of wire
24. Which of the following is not a clue that could indicate the occurrence of a chemical change?
(a) Change in colour
(b) Change in shape
(c) Change in energy
(d) Change in odor
25. Rusting can be prevented by _________ , _________ and _________ the iron articles.
A) polishing, painting, oiling
B) watering, painting and oiling
C) exposing to oxygen, painting, polishing
C) rubbing with sand paper, oiling and polishing
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