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Properties of Matter & Changes Around Us — Homi Bhabha Class 6 Chemistry MCQs with Solutions
Free Homi Bhabha Class 6 Chemistry Properties of Matter & Changes Around Us MCQs with step-by-step solutions covering States of Matter, Physical & Chemical Changes, Reversible & Irreversible Changes, Density & Solubility. Practise online on Prepizo — no login needed.
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Sample questions with solutions
Q1 — States of Matter · easy · theory
The three common states of matter are …
A. Hot, warm and cold
B. Solid, liquid and gas ✓ Correct
C. Big, medium and small
D. Hard, soft and wet
Solution: The three common states in which matter is found are solid, liquid and gas.
Q2 — States of Matter · easy · theory
Which of these is a solid?
A. A wooden block ✓ Correct
B. Air
C. Milk
D. Fruit juice
Solution: A wooden block has a fixed shape and size, so it is a solid.
Q3 — States of Matter · easy · theory
Which state of matter has a fixed shape of its own?
A. Gas
B. Solid ✓ Correct
C. Steam
D. Liquid
Solution: A solid keeps its own fixed shape, unlike a liquid or a gas.
Q4 — States of Matter · easy · theory
When a liquid is poured into a bottle, it takes the shape of …
A. Only a square shape
B. Nothing, it keeps one shape
C. The bottle it is poured into ✓ Correct
D. Only a round shape
Solution: A liquid has no fixed shape, so it takes the shape of the container it is poured into.
Q5 — Physical & Chemical Changes · easy · theory
A change in which no new substance is formed is called a …
A. Chemical change
B. Physical change ✓ Correct
C. New change
D. Colour change
Solution: In a physical change no new substance is made; only the shape, size or state changes.
Q6 — Physical & Chemical Changes · easy · theory
Which of these is a chemical change?
A. Burning a piece of paper ✓ Correct
B. Tearing a piece of paper
C. Melting an ice cube
D. Folding a cloth
Solution: Burning paper makes new substances like ash and smoke, so it is a chemical change.
Q7 — Physical & Chemical Changes · easy · theory
Melting of ice into water is an example of a …
A. Physical change ✓ Correct
B. Burning
C. Chemical change
D. Rusting
Solution: Melting only changes water from solid to liquid; no new substance forms, so it is a physical change.
Q8 — Physical & Chemical Changes · easy · theory
The rusting of an iron nail is an example of a …
A. Chemical change ✓ Correct
B. Bending
C. Melting
D. Physical change
Solution: Rust is a new substance formed on iron, so rusting is a chemical change.
Q9 — Reversible & Irreversible Changes · easy · theory
A change that can be undone to get back the original thing is called a …
A. Irreversible change
B. Reversible change ✓ Correct
C. Fast change
D. Chemical change
Solution: A reversible change can be undone to get the original substance back.
Q10 — Reversible & Irreversible Changes · easy · theory
A change that cannot be undone is called an …
A. Reversible change
B. Irreversible change ✓ Correct
C. Slow change
D. Easy change
Solution: An irreversible change cannot be undone; the original thing cannot be got back.
Q11 — Reversible & Irreversible Changes · easy · theory
Which of these is a reversible change?
A. Burning a matchstick
B. Melting an ice cube ✓ Correct
C. Baking a cake
D. Cooking an egg
Solution: Melted ice can be frozen back into ice, so melting is a reversible change.
Q12 — Reversible & Irreversible Changes · easy · theory
Which of these is an irreversible change?
A. Stretching a rubber band
B. Folding a paper
C. Freezing water
D. Burning a piece of wood ✓ Correct
Solution: Once wood is burnt into ash and smoke, it cannot be turned back, so burning is irreversible.
Q13 — Density & Solubility · easy · theory
A substance that dissolves fully in water is said to be …
A. Soluble in water ✓ Correct
B. A magnet
C. Insoluble in water
D. A gas
Solution: A substance that dissolves in water is called soluble in water.
Q14 — Density & Solubility · easy · theory
Which of these dissolves in water?
A. Sand
B. Chalk powder
C. Cooking oil
D. Sugar ✓ Correct
Solution: Sugar dissolves fully in water, while sand, chalk powder and oil do not.
Q15 — Density & Solubility · easy · theory
Which of these does NOT dissolve in water?
A. Sugar
B. Glucose
C. Sand ✓ Correct
D. Salt
Solution: Sand is insoluble; it does not dissolve in water and settles at the bottom.
Q16 — Density & Solubility · easy · theory
When oil is poured into water, the oil floats on top because oil is …
A. A kind of metal
B. Heavier than water
C. The same weight as water
D. Lighter (less dense) than water ✓ Correct
Solution: Oil is less dense (lighter) than water, so it floats on top of the water.
Q17 — States of Matter · hard · theory
A gas is let out from a bottle into a room. What does it do?
A. Turns into a pool of liquid
B. Stays inside the bottle shape
C. Spreads out to fill the whole room ✓ Correct
D. Falls to the floor as a solid
Solution: A gas has no fixed shape or volume, so it spreads out to fill all the space available to it.
Q18 — States of Matter · hard · theory
A liquid has a fixed ____ but no fixed ____.
A. volume; shape ✓ Correct
B. colour; smell
C. shape; size
D. shape; volume
Solution: A liquid always keeps the same volume but takes the shape of its container, so it has a fixed volume but no fixed shape.
Q19 — Physical & Chemical Changes · hard · theory
Which pair contains only physical changes?
A. Cooking rice and burning coal
B. Melting of wax and folding of paper ✓ Correct
C. Burning of wax and rusting of iron
D. Rusting of iron and souring of milk
Solution: Melting wax and folding paper make no new substance, so both are physical changes.
Q20 — Physical & Chemical Changes · hard · theory
When a candle burns, the wax near the flame melts and the wick burns. Which statement is correct?
A. Both melting and burning are chemical changes
B. Melting of wax is a physical change, but burning is a chemical change ✓ Correct
C. Melting is chemical and burning is physical
D. Both are physical changes
Solution: Melting only changes the wax to a liquid (physical), while burning forms new substances like gases and smoke (chemical).
Q21 — Reversible & Irreversible Changes · hard · theory
Which group contains only irreversible changes?
A. Burning wood, cooking food, rusting of iron ✓ Correct
B. Melting ice, boiling water, freezing water
C. Freezing water, melting butter, blowing a balloon
D. Folding paper, stretching a spring, melting wax
Solution: Burning wood, cooking food and rusting of iron all form new substances that cannot be turned back, so all three are irreversible.
Q22 — Reversible & Irreversible Changes · hard · theory
Why is the burning of paper called an irreversible change?
A. Because paper is very thin
B. Because the paper only changes colour
C. Because burning is very fast
D. Because the ash and smoke cannot be turned back into paper ✓ Correct
Solution: Burning paper makes ash and smoke, which can never be turned back into the original paper, so it is irreversible.
Q23 — Density & Solubility · hard · numerical
A stone has a mass of 50 g and a volume of 25 cm³. Water has a density of 1 g/cm³. Will the stone float or sink?
A. It floats, because its density is 0.5 g/cm³
B. It floats, because its density is 2 g/cm³
C. It sinks, because its density (2 g/cm³) is more than water ✓ Correct
D. It stays in the middle of the water
Solution: Density = 50 ÷ 25 = 2 g/cm³, which is more than water’s 1 g/cm³, so the stone sinks.
Q24 — Density & Solubility · hard · theory
Sugar dissolves faster in a glass of hot water than in cold water. This is because …
A. Cold water already has sugar in it
B. Sugar dissolves faster in warmer water ✓ Correct
C. Sugar cannot dissolve in cold water at all
D. Hot water is much heavier
Solution: Warming the water makes sugar dissolve faster than it does in cold water.
Q25 — States of Matter · medium · theory
Gases have no fixed shape and no fixed …
A. Volume ✓ Correct
B. Colour
C. Name
D. Number
Solution: A gas spreads out completely, so it has neither a fixed shape nor a fixed volume.
Q26 — States of Matter · medium · theory
When ice melts, it changes from a …
A. Solid to a liquid ✓ Correct
B. Liquid to a gas
C. Liquid to a solid
D. Gas to a solid
Solution: Ice is solid water; on melting it turns into liquid water, so it changes from solid to liquid.
Q27 — States of Matter · medium · theory
Which state of matter can be squeezed (compressed) into a smaller space most easily?
A. Gas ✓ Correct
B. Liquid
C. Solid
D. Ice
Solution: A gas has lots of empty space between its particles, so it can be compressed easily.
Q28 — States of Matter · medium · theory
In which state of matter are the particles packed most closely together?
A. Vapour
B. Liquid
C. Solid ✓ Correct
D. Gas
Solution: In a solid the particles are packed very tightly and closely, giving it a fixed shape.
Q29 — Physical & Chemical Changes · medium · theory
In a chemical change, a ____ substance is always formed.
A. new ✓ Correct
B. round
C. cold
D. wet
Solution: A chemical change always produces one or more new substances that were not there before.
Q30 — Physical & Chemical Changes · medium · theory
Which of these is a physical change?
A. Burning wood
B. Cooking an egg
C. Dissolving sugar in water ✓ Correct
D. Souring of milk
Solution: When sugar dissolves in water no new substance forms—the sugar is still there—so it is a physical change.