C1 : The Particulate Nature of Matter - FA

In which substance are the particles close together and slowly moving past each other?

• air

• ice

• steam

• water

The diagrams in the attached image show the arrangement of particles in three different physical states of substance X.

Which statement about the physical states of substance X is correct?

• Particles in state 1 vibrate about fixed positions.

• State 1 changes to state 2 by diffusion.

• State 2 changes directly to state 3 by condensation.

• The substance in state 3 has a fixed volume.

Read the Q from the attached image and then choose the correct option

• A

• B

• C

• D

A liquid is heated until it boils.

Which result shows that the liquid in the test tube is pure water? (image attached for reference)

• Condensation forms at the top of the test tube.

• Steam is produced.

• The thermometer reads 100°C.

• There is nothing left behind in the test tube.

Refer to the attached question and then choose the correct option from the table

• A

• B

• C

• D

A gas jar of bromine vapour and a gas jar of air are set up as shown in diagram 1.

The glass slide is removed. Diagram 2 shows the appearance of the gas jars after one hour.

Which statement explains why the bromine and air mix together?

• Bromine is denser than air.

• Bromine is lighter than air.

• Bromine molecules moved upwards and molecules in air moved downwards.

• Molecules in bromine and air moved randomly.

‘Particles moving very slowly from an area of high concentration to an area of low concentration.’

Which process is being described above?

• a liquid being frozen

• a solid melting

• a substance diffusing through a liquid

• a substance diffusing through the air

Observe the attached image and answer in which changes do the particles move further apart?

• W and X

• W and Z

• X and Y

• Y and Z

The attached diagrams X, Y and Z represent the three states of matter.

Which change occurs during boiling?

• X to Y

• Y to Z

• Z to X

• Z to Y

Refer to the attached image and answer the question as per the table of option given in it.

• A

• B

• C

• D