Welcome to our Class 9 Science Chapter 1 Mock Test page! This test is specially designed to help students master the first chapter of their NCERT Science textbook — “Matter in Our Surroundings.” Whether you’re preparing for your school exams, periodic tests, or simply revising your concepts, this mock test will help you build confidence and accuracy.

1. A student made a model to show how particles of a substance X are arranged. His friends observed the model and concluded that Substance X is a solid. What supports their conclusion? [CBSE T.E.R.M.*]

The particles are closely packed that allows Substance X to change its volume.

The particles are fixed at their positions that allows Substance X to retain its shape.

The particles are bonded to each other that allows Substance X to maintain a fixed mass.

The particles are identical to each other that allows Substance X to have a uniform composition.

Which one of the following sets of phenomenon would increase on raising the temperature?

Diffusion, evaporation and compression of gases.

Evaporation, compression of gases and solubility of solid in liquid.

Evaporation, diffusion, expansion of gases and solubility of solid in liquid.

Evaporation, solubility of gas in liquid, diffusion and compression of gases.

Latent heat of fusion is amount of

heat energy required to change 1 kg solid into liquid completely at its melting point.

heat energy required to convert 1 kg solid into liquid at room temperature.

heat energy required to change 1 g of solid into liquid completely.

heat energy required to change 1 kg of solid into liquid at any temperature.

Which of the following is correct order of forces of attraction?

Water > Air > Sand

Air > Sugar > Oil

Air < Water < Sugar

Salt > Air > Juice

Which of the following will produce severe burns ?

Cold water

Hot water

Boiling water

Steam

Which one of the following sets of phenomena would increase on raising the temperature?

Diffusion, evaporation, compression of gases.

Evaporation, compression of gases, solubility.

Evaporation, diffusion, expansion of gases.

Evaporation, solubility, diffusion, compression of gases.

The physical state of a matter depends upon

temperature and pressure.

Temperature only

pressure only.

Nature of substance

Which of the following cannot be separated by sublimation?

Iodine and NaCl.

Iodine and Ammonium chloride.

Camphor and Sodium chloride.

Naphthalene and Sand.

Which of the following is incorrect?

Solids have fixed shape and fixed volume.

Liquids have fixed volume but not shape.

Gases have neither fixed shape nor volume.

The particles have least intermolecular space but maximum kinetic energy in liquids.

10.

Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions.

Low temperature, low pressure

High temperature, low pressure

Low temperature, high pressure

High temperature, high pressure

11.

Choose the correct statement out of the following.

Conversion of solid into vapours without becoming liquid is called evaporation.

Conversion of vapours into solid without becoming liquid is called sublimation.

Conversion of solid into liquid is called sublimation.

Conversion of liquid into vapours is called fusion.

12.

Shivam visited an LPG unit and found that the gas can be liquified at specific conditions of temperature and pressure. Help him to identify the correct set of conditions.

High temperature and high pressure.

Low temperature and low pressure.

Low temperature and high pressure.

High temperature and low pressure.

13.

Which of the following is not a characteristic of matter?

Matter is made up of extremely small particles

There is no space between particles of matter

The particles of matter are continuously moving

The particles of matter attract each other.

14.

During summer, water kept in earthen pot becomes cool due to phenomenon of

Diffusion

Transpiration

Distillation

Evaporation

15.

The property to flow is unique to fluids. Which one of the following statement is correct?

Only gases behave like fluids

Gases and solids behave like fluids

Gases and liquids behave like fluids

Only liquids are fluids

16.

Which of the following is not correct?

SI unit of temperature is kelvin

SI unit of pressure is atm

SI unit of density is kg/m³

1 litre = 1000 cm3 = 1 dm3

17.

A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the following represents a correct arrangement?

Water, air, wind

Air, sugar, oil

Oxygen, water, sugar

Salt, juice, air

18. A student learns that the particles of brick are arranged in a manner so that they attract each other with greater force. Which diagram shows the arrangement of particles in a brick? [CBSE T.E.R.M.*]

19.

During summer, water kept in an earthen pot becomes cool because of the phenomenon of

diffusion

transpiration

osmosis

evaporation

20.

On converting 25 °C, 38 °C and 66 °C to Kelvin scale, the correct sequence of temperature will be

298 K, 311 K and 339 K

298 K, 300 K and 338 K

273 K, 278 K and 543 K

298 K, 310 K and 338 K

21.

The temperature at which vapour pressure of liquid becomes equal to atmospheric pressure is called

melting point.

boiling point

ignition temperature

sublimation temperature.

22.

The particles have least intermolecular space but maximum kinetic energy in liquids.

Increase in temperature of water.

Decrease in wind speed.

Decrease in surface area of water.

Adding sugar to water.

23. Seema took a 100 ml beaker and filled half the beaker with water and marked the level of water. She dissolved some salt with the help of a glass rod and recorded water level again.

Choose the correct observation related to above activity.

The water level increases appreciably

The water level decreases

The water level remains the same

There is little increase in water level.

24.

Which of the following has minimum kinetic energy ?

Particles of ice below 0 °C.

Particles of water at 0 °C .

Particles of water at 100 °C.

Particles of steam at 100 °C.

25.

Ice floats on water because

it has higher density than water.

it has lower density than water due to more volume

it is solid.

it is low melting solid.

26.

If we keep cold drink bottle in freezer, what will happen?

Water will change into ice

Cold drink bottle will break

CO2 gas will get solidified

Nothing happens.

27. A student put an equal amount of potassium permanganate powder over a glass plate and in a beaker filled with water. The student rubbed the surface of the plate and stir the contents of the beaker. It was observed that the permanganate powder dissolved in the water and formed a colored solution. Which option explains the reason for the student’s observation? [CBSE T.E.R.M.*]

Water is a liquid and can dissolve and solid particles in it

The ability of water to exist in any state allows it to dissolve any substance

Water has large intermolecular spaces which allow molecules of other substances to get between those spaces

Water particles are tightly arranged in an orderly fashion which allows the binding of the molecules of other substances

28. Liquid diffuse slowly as compared to gases because

the molecules of liquids are too heavy

the molecules of liquid more fast

the liquids do not have definite shape

in liquids state molecules are held together by strong intermolecular forces as compared to gases.

29.

The boiling point of water at higher altitude is

373 K

< 373 K

> 373 K

273 K

30.

Which of the following is correct order of density ?

Air < Exhaust from chimneys < Honey < Water < Chalk < Cotton < Iron.

Air < Exhaust from Chimneys < Water < Honey < Cotton < Chalk < Iron.

Air < Exhaust from Chimneys < Honey < Water < Chalk < Iron < Cotton

Air < Exhaust from Chimneys < Water < Honey < Chalk < Cotton < Iron.

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