Online Test — Matter & Its Changes
10 Questions • 12 min • Chapter MCQ
12:00
Question 1 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 2 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 3 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 4 of 10
easy
Which dissolves in water?
Sand
Salt
Oil
A coin
Explanation: Salt dissolves in water.
Question 5 of 10
medium
Water drops on a cold glass of juice form by…
Condensation
Evaporation
Freezing
Burning
Explanation: Air's vapour condenses on the cold glass.
Question 6 of 10
hard
In which state are the particles farthest apart and moving fastest?
Solid
Gas
Liquid
Ice
Explanation: Gas particles are spread out and move fastest.
Question 7 of 10
easy
Wet clothes dry because the water in them…
Melts
Freezes
Evaporates
Mixes
Explanation: Water evaporates from drying clothes.
Question 8 of 10
easy
Ice melting into water is caused by…
Quiet
Cold
Darkness
Heat
Explanation: Heat melts ice into water.
Question 9 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 10 of 10
medium
Water freezes into ice when it is made very…
Cold
Hot
Bright
Loud
Explanation: Cold makes water freeze into ice.