9th Class . Chapter - 01 . Matter In Our Surroundings

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The objective of starting the Science Quiz test series is to help all the students of class IX who are preparing for the examinations for 2020-21 so that they can get 100% marks in their examinations.

Q 1. When a gas jar full of air is placed upside down on a gas jar full of bromine vapors, the red-brown vapors of bromine from the lower jar go upward into the jar containing air. In this experiment:

2 points

Air is heavier than bromine

Both air and bromine have the same density

Bromine is heavier than air

Bromine cannot be heavier than air because it is going upwards against gravity

Clear selection

Q 2. A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter is

2 points

Krypton

Kerosene

Carbon steel

Carbon dioxide

Clear selection

Q 3. Which one of the following statements is not true?

2 points

The molecules in a solid vibrate about a fixed position

The molecules in a liquid are arranged in a regular pattern

The molecules in a gas exert negligibly small forces on each other, except during collisions

The molecules of a gas occupy all the space available

Clear selection

Q 4. The correct procedure of heating the iron-sulphur mixture to prepare iron sulphide is:

2 points

Heat the powder mixture at the base of the test tube using a blue flame throughout.

Heat the iron filings and sulphur mixture in the middle of the test tube using yellow flame throughout.

Heat the powder mixture at the top of the test tube using an orange flame throughout.

Heat the iron filings-sulphur mixture at 3/4 quarters of the test tube using a red flame throughout.

Clear selection

Q 5. When water at 0°C freezes to form ice at the same temperature of 0°C, then it:

2 points

Absorbs some heat

Releases some heat

Neither absorbs nor releases heat

Releases temperature

Clear selection

Q 6. When heat is constantly supplied by a burner to boiling water, then the temperature of the water during vaporization:

2 points

Rises very slowly

Rises rapidly until steam is produced

First rises and then becomes constant

Does not rise at all

Clear selection

Q 7. Which one of the following sets of phenomena would increase in raising the temperature?

2 points

Diffusion, evaporation, compression of gases

Evaporation, compression of gases, solubility

Evaporation, diffusion, expansion of gases

Evaporation, solubility, diffusion, compression of gases

Clear selection

Q 8. On converting 308 K, 329 K and 391 K to Celsius scale, the correct sequence of temperatures will be

2 points

33°C, 56°C and 118°C

35°C, 56°C and 119°C

35°C, 56°C and 118°C

56°, 119°C and 35° C

Clear selection

Q 9. Which of the following phenomena always results in the cooling effect?

2 points

Condensation

Evaporation

Sublimation

None of these

Clear selection

Q 10. Which of the following cannot be considered a form of matter?

2 points

Atom

Water

Humidity

Electron

Clear selection

Q 11. Which of the following causes the temperature of a substance to remain constant while it is undergoing a change in its state?

2 points

Latent heat

Lattice energy

Loss of heat

None of these

Clear selection

Q 12. Which of the following statement is correct?

2 points

Materials existing as liquids at room temperature have their melting and boiling points lower than that of room temperature.

The phenomenon involving the transition of a substance from solid to liquid state is called sublimation.

To convert a temperature on the Celsius scale to Kelvin scale, subtract 273 from the given temperature

The density of ice is less than that of water.

Clear selection

Q 13. Which of the following statement is not true regarding the characteristic of matter?

2 points

Particles of a matter are randomly moving in all directions.

Kinetic energy of the particles increases with a rise in temperature

Kinetic energy of the particles of all maters remains the same at a particular temperature.

Particles of matter diffuse into each other on their own.

Clear selection

Q 14. The Property to flow is unique to fluids. Which one of the following statements is correct?

2 points

Only gases behave like fluids

Gases and solids behave like fluids

Gases and liquids behave like fluids

Only liquids are fluids

Clear selection

Q 15. During Summer, water kept in an earthen pot becomes cool because of the phenomenon of

2 points

Diffusion

Transpiration

Osmosis

Evaporation

Clear selection

Q 16. 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?

2 points

Water, air, wind

Air, sugar, oil

Oxygen, water, sugar

Salt, juice, air

Clear selection

Q 17. During evaporation, particles of a liquid change to vapors only:

2 points

from the surface

from the bulk

from both surface and bulk

neither from surface nor bulk

Clear selection

Q 18. Which of the following statements are correct?

2 points

Matter is made up of particles

Matter is continuous in nature

Particles of matter are always in state of motion

Particles of matter attract each other

Clear selection

Q 19. Which of the following is not a matter?

2 points

Air

Feeling of cold

Dust

Humidity

Clear selection

Q 20. Which of the following will not undergo sublimation?

2 points

Camphor

Ammonium Chloride

Iodine

Sodium chloride

Clear selection

Q 21. On increasing the temperature of a gas

2 points

Its K.E increases

Its K.E decreases

Its gets converted into liquid

Its particles come closer to each other

Clear selection

Q 22. The interparticle forces are the strongest in:

2 points

Ammonia

Ethyl alcohol

Carbon dioxide

Sodium bromide

Clear selection

Q 23. Select the substances which do not undergo sublimation

2 points

Common salt

Naphthalene

Ammonium chloride

Camphor

Clear selection

Q 24. Inter-molecular forces are strongest in

2 points

solids

liquids

gases

plasma

Clear selection

Q 25. Conversion of liquid into vapors below its boiling point is

2 points

evaporation

condensation

fusion

none of these

Clear selection

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