G1 Science Chapter 6: Matter

What is condensation?

• Condensation is the process by which a liquid turns into a solid.
• Condensation is the process of changing steam into water droplets.

• Condensation is the process that occurs only when water is heated to its boiling point.

• Condensation is the process of the change of state of water from the liquid state to the gaseous state at the surface of the liquid.

Water was added to a mixture of salt and sand and stirred.

What should be the next step to obtain sand from the mixture?

• Melt the mixture.

• Freeze the mixture.

• Boil the mixture.

• Filter the mixture.

Peter made two cups of tea, X and Y.

10.0 g of fine sugar was added to cup X and 10.0 g of coarse sugar was added to cup Y.

Both cups were left to stand at room temperature for 10 minutes without stirring.

Peter took a sip of tea from both cups of tea and observed that the tea in cup X tasted sweeter.

Which conclusion can be made from the above experiment?

• The total surface area of the sugar crystals affects the rate at which sugar dissolves.

• Stirring affects the rate at which sugar dissolves.

• The cup used affects the rate at which sugar dissolves.

• The temperature of the water affects the rate at which sugar dissolves.

Which process does not involve a change of state?

• melting

• boiling

• condensation

• filtration

Siti added some soil to water. A suspension was obtained.

Which statement explains why the mixture of soil and water is a suspension?

• Soil is soluble in water.

• Soil is not soluble in water.

• She did not stir the mixture.

• She did not heat the mixture.

Three liquids were each tested with litmus papers. The following observations were made:

• - Liquid X turned blue litmus paper red.

• - Liquid Y had no effect on both blue and red litmus papers.

• - Liquid Z turned red litmus paper blue.

• 
  Which row correctly describes the three liquids?

• A

• B

• C

• D

Ben conducted an experiment to determine if an increase in the temperature of a solvent increases the solubility of a solute. He recorded the results of his experiment in the table below.

Which finding is incorrect?

• A

• B

• C

• D

The pH values of solutions A to D are given below:

A - pH 1

B - pH 5

C - pH 7

D - pH 12

Name the neutral solution.

• A

• B

• C

• D

The pH values of solutions A to D are given below:

A - pH 1

B - pH 5

C - pH 7

D - pH 12

Name the most alkaline solution.

• A

• B

• C

• D

The pH values of solutions A to D are given below:

A - pH 1

B - pH 5

C - pH 7

D - pH 12

Name the most acidic solution.

• A

• B

• C

• D