Online Test — Matter & Its Changes
10 Questions • 12 min • Chapter MCQ
12:00
Question 1 of 10
hard
Which of these is a reversible change?
Rusting iron
Burning wood
Cooking rice
Melting chocolate
Explanation: Melted chocolate can set again — reversible.
Question 2 of 10
easy
A change that cannot be undone is…
Freezing
Reversible
Melting
Irreversible
Explanation: An irreversible change cannot be undone.
Question 3 of 10
easy
A substance that dissolves in water is said to be…
Soluble
Insoluble
Frozen
Solid only
Explanation: Things that dissolve are soluble.
Question 4 of 10
medium
Sand does not dissolve in water, so sand is…
A gas
Soluble
Insoluble
Frozen
Explanation: Sand does not dissolve — it is insoluble.
Question 5 of 10
hard
Butter left in a hot pan turns runny. This change is…
Mixing
Freezing
Melting
Burning
Explanation: Heat melts the solid butter into a liquid.
Question 6 of 10
easy
When vapour cools and turns back into a liquid, it is called…
Evaporation
Condensation
Melting
Freezing
Explanation: Vapour cooling into liquid is condensation.
Question 7 of 10
medium
Melting and freezing are opposite changes; both change the ___ of matter.
Colour
State
Name
Weight
Explanation: Both change matter from one state to another.
Question 8 of 10
easy
A solid has a fixed shape and a fixed…
Colour only
Size (volume)
Smell
Sound
Explanation: Solids have a fixed shape and size.
Question 9 of 10
easy
Wet clothes dry because the water in them…
Melts
Freezes
Evaporates
Mixes
Explanation: Water evaporates from drying clothes.
Question 10 of 10
easy
A liquid takes the shape of its…
Box only
Own
Container
Hand
Explanation: Liquids take the shape of the container.