Y10 Chem L7 Separating techniques

Which state of matter can not be compressed yet the particles can move over each other?

• Solid

• Liquid

• Gas

• Fluid

The graph shows the changes of temperature when a substance is heated. What is happening at X and Y?

• Freezing and boiling

• Melting and evaporating

• Freezing and evaporating

• Melting and boiling

Which diagram shows the process of diffusion?

• A

• B

• C

• D

Hexane and octane are liquid hydrocarbons that are completely soluble in each other. Which is the best method for separating a mixture of these two liquids?

• A

• B

• C

• D

Which of the factors will not increase the rate of diffusion?

• Increasing the temperature of a solution

• Increasing the concentration of a solute

• Decreasing the particle size of the solute

• Increasing the pressure in a gas

The diagrams show liquids in a burette and a measuring cylinder. Which are the correct readings for the burette and the measuring cylinder? 

• 27.8 and 42

• 27.8 and 44

• 28.2 and 42

• 28.2 and 44

Henna is a dye extracted from a plant. Which apparatus is used to show henna is a mixture of different colours?

• A

• B

• C

• D

A student is investigating a coloured mixture using chromatography. Where should the student place the coloured mixture?

• On the solvent line

• Just above the pencil line

• Just below the pencil line

• On the pencil line

Given the following solubility curve for a salt, estimate the mass of salt needed to saturate 200 cm³ of water at 30ºC.

• 10 g

• 20 g

• 30 g

• 40 g

Which is the correct order for separating salt from rock salt?

• Dissolve, filter, evaporate

• Filter, dissolve, evaporate

• Evaporate, dissolve, filter

• Dissolve, evaporate, filter