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Class 9 · Science · Chapter 1: Matter in Our Surroundings

BSEB Class 9 Science Chapter 1: Objective Questions (MCQ) with Answers

Bihar Board · NCERT · CBSE

All 61 objective questions (MCQ) of this chapter — solve first, then tap “Show answer”. Each question shows its source label: «BSEB 2025 · board paper» = verified from the official board paper; «Board-style (practice)» = Study With Me's own practice questions.

← Chapter 1: Matter in Our Surroundings — full notes, video, questions

1Check1 mark

Which of these is matter?

  1. (A) love
  2. (B) the feeling of smell
  3. (C) air
  4. (D) thought
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Correct answer: (C) air

Air occupies space and has mass.

2Check1 mark

In Activity 1.2, each dilution mixes

  1. (A) 10 mL into 90 mL
  2. (B) 50 mL into 50 mL
  3. (C) 1 mL into 100 mL
  4. (D) 90 mL into 10 mL
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Correct answer: (A) 10 mL into 90 mL

10 mL of solution + 90 mL of clear water.

3Check1 mark

Intermixing of particles of two kinds of matter on their own is called

  1. (A) evaporation
  2. (B) diffusion
  3. (C) sublimation
  4. (D) condensation
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Correct answer: (B) diffusion

That is the definition of diffusion.

4Check1 mark

In Activity 1.7, particles of which are held with the greatest force?

  1. (A) chalk
  2. (B) rubber band
  3. (C) iron nail
  4. (D) all equal
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Correct answer: (C) iron nail

The iron nail is the hardest to break.

5Check1 mark

Choose the correct statement about liquids.

  1. (A) fixed shape and volume
  2. (B) fixed volume, no fixed shape
  3. (C) neither shape nor volume
  4. (D) fixed shape, no fixed volume
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Correct answer: (B) fixed volume, no fixed shape

Liquids take the container's shape but keep their volume.

6Check1 mark

In Activity 1.11, which syringe piston moves in most easily?

  1. (A) water
  2. (B) chalk
  3. (C) air
  4. (D) all equal
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Correct answer: (C) air

Gas particles have the most space between them.

7Check1 mark

Convert 300 K to Celsius.

  1. (A) 573 °C
  2. (B) 27 °C
  3. (C) −27 °C
  4. (D) 300 °C
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Correct answer: (B) 27 °C

300 − 273 = 27 °C.

8Check1 mark

Why is solid CO₂ called dry ice?

  1. (A) It is made of water
  2. (B) It turns to gas without becoming liquid
  3. (C) It is very hot
  4. (D) It does not dissolve in water
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Correct answer: (B) It turns to gas without becoming liquid

At 1 atm it changes straight into gas.

9Check1 mark

Which of these lowers the rate of evaporation?

  1. (A) more surface area
  2. (B) higher temperature
  3. (C) higher humidity
  4. (D) stronger wind
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Correct answer: (C) higher humidity

Moist air slows evaporation.

10Check1 mark

Droplets form outside a glass of ice-cold water because of

  1. (A) water seeping through the glass
  2. (B) condensation of water vapour in air
  3. (C) evaporation
  4. (D) sublimation
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Correct answer: (B) condensation of water vapour in air

Water vapour loses energy on the cold surface and becomes liquid.

11Book-based · Intro · p. 11 mark

Which is NOT a property of matter?

  1. (A) occupies space
  2. (B) has mass
  3. (C) made of particles
  4. (D) occupies no space
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Correct answer: (D) occupies no space

Answer: occupies no space.

12Book-based · Intro · p. 11 mark

Which is not one of the Panch Tatva?

  1. (A) air
  2. (B) fire
  3. (C) metal
  4. (D) sky
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Correct answer: (C) metal

Answer: metal.

13Book-based · 1.1 footnote · p. 11 mark

1 mL equals

  1. (A) 1 dm³
  2. (B) 1 cm³
  3. (C) 1 m³
  4. (D) 1000 cm³
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Correct answer: (B) 1 cm³

Answer: 1 cm³.

14Book-based · 1.1.2 · p. 21 mark

A few crystals of potassium permanganate can colour about

  1. (A) 1 L
  2. (B) 10 L
  3. (C) 100 L
  4. (D) 1000 L
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Correct answer: (D) 1000 L

Answer: 1000 L.

15Book-based · 1.2.2 · p. 31 mark

As temperature rises, the kinetic energy of particles

  1. (A) decreases
  2. (B) increases
  3. (C) stays the same
  4. (D) becomes zero
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Correct answer: (B) increases

Answer: increases.

16Book-based · 1.3.2 · p. 41 mark

Aquatic animals can breathe under water because of

  1. (A) dissolved oxygen
  2. (B) dissolved salt
  3. (C) water temperature
  4. (D) water colour
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Correct answer: (A) dissolved oxygen

Answer: dissolved oxygen.

17Book-based · 1.3.3 · p. 51 mark

The compressed gas used as fuel in vehicles is

  1. (A) LPG
  2. (B) CNG
  3. (C) oxygen
  4. (D) helium
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Correct answer: (B) CNG

Answer: CNG.

18Book-based · 1.4.1 · p. 71 mark

The melting point of ice is

  1. (A) 273.16 K
  2. (B) 373 K
  3. (C) 0 K
  4. (D) 100 K
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Correct answer: (A) 273.16 K

Answer: 273.16 K.

19Book-based · 1.4.1 · p. 71 mark

The boiling point of water in kelvin is

  1. (A) 273 K
  2. (B) 373 K
  3. (C) 100 K
  4. (D) 473 K
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Correct answer: (B) 373 K

Answer: 373 K.

20Book-based · 1.4.1, Activity 1.13 · p. 81 mark

Which substance shows sublimation?

  1. (A) salt
  2. (B) sugar
  3. (C) ammonium chloride
  4. (D) ice
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Correct answer: (C) ammonium chloride

Answer: ammonium chloride.

21Book-based · 1.4.2 · p. 81 mark

Dry ice is

  1. (A) solid water
  2. (B) solid CO₂
  3. (C) solid oxygen
  4. (D) solid nitrogen
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Correct answer: (B) solid CO₂

Answer: solid CO₂.

22Book-based · 1.4.2 footnote · p. 81 mark

1 atm equals

  1. (A) 1.01 × 10⁵ Pa
  2. (B) 1.01 × 10³ Pa
  3. (C) 101 Pa
  4. (D) 10⁵ N
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Correct answer: (A) 1.01 × 10⁵ Pa

Answer: 1.01 × 10⁵ Pa.

23Book-based · 1.5.1 · p. 91 mark

The rate of evaporation decreases when

  1. (A) temperature rises
  2. (B) humidity rises
  3. (C) wind is faster
  4. (D) surface area increases
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Correct answer: (B) humidity rises

Answer: humidity rises.

24Book-based · 1.4.1 · p. 71 mark

Boiling is a

  1. (A) surface phenomenon
  2. (B) bulk phenomenon
  3. (C) sublimation
  4. (D) condensation
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Correct answer: (B) bulk phenomenon

Answer: bulk phenomenon.

25Book-based · More to know · p. 101 mark

Plasma is found in

  1. (A) ice
  2. (B) the Sun and stars
  3. (C) water
  4. (D) wood
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Correct answer: (B) the Sun and stars

Answer: the Sun and stars.

26Book-based · Intro · p. 11 mark

Modern scientists classify matter on the basis of

  1. (A) colour and smell
  2. (B) physical properties and chemical nature
  3. (C) size and weight
  4. (D) state alone
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Correct answer: (B) physical properties and chemical nature

Answer: physical properties and chemical nature.

27Book-based · Intro (footnote) · p. 11 mark

The SI unit of mass is

  1. (A) kilogram
  2. (B) newton
  3. (C) litre
  4. (D) gram
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Correct answer: (A) kilogram

Answer: kilogram.

28Book-based · Intro (footnote) · p. 11 mark

The SI unit of volume is

  1. (A) cubic centimetre
  2. (B) cubic metre (m³)
  3. (C) litre
  4. (D) millilitre
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Correct answer: (B) cubic metre (m³)

Answer: cubic metre (m³).

29Book-based · Intro (footnote) · p. 11 mark

1 L equals

  1. (A) 1 dm³
  2. (B) 1 cm³
  3. (C) 1 m³
  4. (D) 100 mL
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Correct answer: (A) 1 dm³

Answer: 1 dm³.

30Book-based · Activity 1.1 · p. 11 mark

In Activity 1.1, on dissolving salt the water level

  1. (A) hardly changes
  2. (B) halves
  3. (C) rises a lot
  4. (D) doubles
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Correct answer: (A) hardly changes

Answer: hardly changes.

31Book-based · 1.1.1 · p. 11 mark

One school of thought believed matter to be like a block of wood, i.e.

  1. (A) continuous
  2. (B) liquid
  3. (C) particulate
  4. (D) gaseous
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Correct answer: (A) continuous

Answer: continuous.

32Book-based · Activity 1.2 · p. 11 mark

In Activity 1.2, how many crystals of potassium permanganate are dissolved in 100 mL water?

  1. (A) 20–30
  2. (B) 100
  3. (C) 2–3
  4. (D) a spoonful
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Correct answer: (C) 2–3

Answer: 2–3.

33Book-based · Activity 1.2 · p. 21 mark

In Activity 1.2 the solution is diluted

  1. (A) 5 to 8 times
  2. (B) 50 times
  3. (C) 20 times
  4. (D) 1–2 times
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Correct answer: (A) 5 to 8 times

Answer: 5 to 8 times.

34Book-based · Activity 1.3 · p. 21 mark

Smelling a lit incense stick from far away shows that particles

  1. (A) are very big
  2. (B) are at rest
  3. (C) are continuously moving
  4. (D) never mix
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Correct answer: (C) are continuously moving

Answer: are continuously moving.

35Book-based · Activity 1.4 · p. 21 mark

In Activity 1.4, which drop spreads more slowly in water?

  1. (A) both equally
  2. (B) neither
  3. (C) ink
  4. (D) honey
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Correct answer: (D) honey

Answer: honey.

36Book-based · Activity 1.5 · p. 21 mark

In Activity 1.5 the colour of the crystal spreads faster in

  1. (A) neither
  2. (B) cold water
  3. (C) both equally
  4. (D) hot water
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Correct answer: (D) hot water

Answer: hot water.

37Book-based · 1.2.2 · p. 31 mark

On heating, diffusion becomes

  1. (A) unchanged
  2. (B) slower
  3. (C) faster
  4. (D) stopped
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Correct answer: (C) faster

Answer: faster.

38Book-based · Activity 1.6 · p. 31 mark

In Activity 1.6, the first group locks arms like

  1. (A) Bharatanatyam dancers
  2. (B) Bhangra dancers
  3. (C) Idu-Mishmi dancers
  4. (D) Kathak dancers
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Correct answer: (C) Idu-Mishmi dancers

Answer: Idu-Mishmi dancers.

39Book-based · Activity 1.6 · p. 31 mark

In Activity 1.6, which human chain is easiest to break?

  1. (A) touching only with fingertips
  2. (B) arms locked from the back
  3. (C) holding hands
  4. (D) all equal
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Correct answer: (A) touching only with fingertips

Answer: touching only with fingertips.

40Book-based · Activity 1.8 · p. 31 mark

Why is it hard to cut a stream of tap water with a finger?

  1. (A) temperature of water
  2. (B) colour of water
  3. (C) smell of water
  4. (D) force of attraction between particles
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Correct answer: (D) force of attraction between particles

Answer: force of attraction between particles.

41Book-based · 1.3.1 · p. 41 mark

Solids keep their shape under outside force, so they are

  1. (A) diffusing
  2. (B) compressible
  3. (C) rigid
  4. (D) fluid
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Correct answer: (C) rigid

Answer: rigid.

42Book-based · 1.3.1 · p. 41 mark

Why is a rubber band a solid?

  1. (A) it flows
  2. (B) it regains its shape when the force is removed
  3. (C) it gives off gas
  4. (D) it takes the container's shape
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Correct answer: (B) it regains its shape when the force is removed

Answer: it regains its shape when the force is removed.

43Book-based · 1.3.1 · p. 41 mark

A sponge is a solid yet compressible because

  1. (A) it is a liquid
  2. (B) air trapped in its minute holes is expelled on pressing
  3. (C) it has no particles
  4. (D) it melts
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Correct answer: (B) air trapped in its minute holes is expelled on pressing

Answer: air trapped in its minute holes is expelled on pressing.

44Book-based · 1.3.1 · p. 41 mark

Sugar and salt take the shape of a jar, yet they are solids because

  1. (A) each crystal's shape stays fixed
  2. (B) they flow
  3. (C) they melt
  4. (D) they are gases
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Correct answer: (A) each crystal's shape stays fixed

Answer: each crystal's shape stays fixed.

45Book-based · 1.3.2 · p. 41 mark

Liquids have

  1. (A) no fixed volume
  2. (B) neither shape nor volume
  3. (C) no fixed shape but a fixed volume
  4. (D) fixed shape and volume
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Correct answer: (C) no fixed shape but a fixed volume

Answer: no fixed shape but a fixed volume.

46Book-based · 1.3.2 · p. 51 mark

The rate of diffusion of liquids is higher than of solids because liquid particles

  1. (A) are heavier
  2. (B) move freely with more space between them
  3. (C) attract more
  4. (D) are fixed
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Correct answer: (B) move freely with more space between them

Answer: move freely with more space between them.

47Book-based · 1.3.3 · p. 51 mark

The gas in the home cooking cylinder is

  1. (A) steam
  2. (B) CNG
  3. (C) oxygen
  4. (D) LPG
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Correct answer: (D) LPG

Answer: LPG.

48Book-based · 1.3.3 · p. 51 mark

The pressure of a gas on the walls of its container is due to

  1. (A) particles hitting the walls
  2. (B) the weight of the gas
  3. (C) the wall temperature
  4. (D) the colour of the gas
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Correct answer: (A) particles hitting the walls

Answer: particles hitting the walls.

49Book-based · Activity 1.11 · p. 51 mark

In Activity 1.11, which piston is hardest to push in?

  1. (A) the air syringe
  2. (B) the water syringe
  3. (C) the chalk syringe
  4. (D) all equal
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Correct answer: (C) the chalk syringe

Answer: the chalk syringe.

50Book-based · 1.4 · p. 61 mark

The three states of water are

  1. (A) water only
  2. (B) ice, steam, cloud
  3. (C) ice, water, dew
  4. (D) ice, water, water vapour
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Correct answer: (D) ice, water, water vapour

Answer: ice, water, water vapour.

51Book-based · Activity 1.12 · p. 61 mark

In Activity 1.12 about how much ice is taken?

  1. (A) 500 g
  2. (B) 5 g
  3. (C) about 150 g
  4. (D) about 1 kg
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Correct answer: (C) about 150 g

Answer: about 150 g.

52Book-based · 1.4.1 · p. 71 mark

The word "latent" means

  1. (A) fast
  2. (B) cold
  3. (C) hot
  4. (D) hidden
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Correct answer: (D) hidden

Answer: hidden.

53Book-based · 1.4.1 · p. 71 mark

The melting point of a solid indicates

  1. (A) its colour
  2. (B) its volume
  3. (C) its smell
  4. (D) the strength of attraction between its particles
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Correct answer: (D) the strength of attraction between its particles

Answer: the strength of attraction between its particles.

54Book-based · 1.4.1 · p. 71 mark

At 273 K, particles of water have energy compared to ice at the same temperature that is

  1. (A) less
  2. (B) more
  3. (C) equal
  4. (D) zero
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Correct answer: (B) more

Answer: more.

55Book-based · 1.4.1 (footnote) · p. 71 mark

To change kelvin to Celsius we

  1. (A) subtract 273
  2. (B) add 273
  3. (C) divide by 100
  4. (D) multiply by 100
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Correct answer: (A) subtract 273

Answer: subtract 273.

56Book-based · Activity 1.13 · p. 81 mark

In Activity 1.13, what is put on the stem of the funnel?

  1. (A) a rubber tube
  2. (B) a thermometer
  3. (C) a cork
  4. (D) a cotton plug
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Correct answer: (D) a cotton plug

Answer: a cotton plug.

57Book-based · 1.4.2 · p. 81 mark

Gases can be liquefied by

  1. (A) changing colour
  2. (B) applying pressure and reducing temperature
  3. (C) shaking
  4. (D) lowering pressure and raising temperature
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Correct answer: (B) applying pressure and reducing temperature

Answer: applying pressure and reducing temperature.

58Book-based · 1.4.2 (footnote) · p. 81 mark

1 atmosphere equals

  1. (A) 1.01 × 10⁵ Pa
  2. (B) 1.01 × 10³ Pa
  3. (C) 100 Pa
  4. (D) 10⁹ Pa
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Correct answer: (A) 1.01 × 10⁵ Pa

Answer: 1.01 × 10⁵ Pa.

59Book-based · 1.5 · p. 91 mark

Evaporation takes place

  1. (A) only at the boiling point
  2. (B) only in solids
  3. (C) only at 0 °C
  4. (D) at any temperature below the boiling point
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Correct answer: (D) at any temperature below the boiling point

Answer: at any temperature below the boiling point.

60Book-based · 1.5.2 · p. 101 mark

Sprinkling water on a roof after a hot day cools it because

  1. (A) water is heavy
  2. (B) the roof soaks water
  3. (C) water is colourless
  4. (D) water has a large latent heat of vaporisation
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Correct answer: (D) water has a large latent heat of vaporisation

Answer: water has a large latent heat of vaporisation.

61Book-based · More to know · p. 101 mark

To form a BEC the gas density is about what fraction of normal air?

  1. (A) double
  2. (B) half
  3. (C) one-hundred-thousandth
  4. (D) one-tenth
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Correct answer: (C) one-hundred-thousandth

Answer: one-hundred-thousandth.

← Chapter 1: Matter in Our Surroundings — full notes, video, questions