Online Test — Matter & Its Changes
10 Questions • 12 min • Chapter MCQ
12:00
Question 1 of 10
easy
When a solid is heated and turns into a liquid, it is called…
Freezing
Melting
Boiling
Mixing
Explanation: A solid melts into a liquid when heated.
Question 2 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 3 of 10
easy
A liquid takes the shape of its…
Box only
Own
Container
Hand
Explanation: Liquids take the shape of the container.
Question 4 of 10
medium
A gas spreads out to fill…
Nothing
A fixed shape
Only a cup
All the space it can
Explanation: Gases spread to fill all the space available.
Question 5 of 10
hard
Even though dissolved sugar disappears from sight, we know it is still there because the water tastes…
Sweet
Sour
Salty
Of nothing
Explanation: The sweet taste shows the sugar is still in the water.
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
easy
Which dissolves in water?
Sand
Salt
Oil
A coin
Explanation: Salt dissolves in water.
Question 8 of 10
easy
When a liquid turns into a gas (vapour), it is called…
Evaporation
Freezing
Melting
Mixing
Explanation: A liquid becoming vapour is evaporation.
Question 9 of 10
medium
Cooking an egg is ___ because you cannot get the raw egg back.
Melting
Reversible
Irreversible
Mixing only
Explanation: A cooked egg cannot return to raw — irreversible.
Question 10 of 10
medium
Burning a piece of paper is an ___ change.
Reversible
Irreversible
Melting
Freezing
Explanation: Burnt paper cannot become paper again — irreversible.