REVISION 3

Study figure below carefully. It shows the process of distillation of salt water. What is the temperature shown by the thermometer when the salt water is boiling?

(SPE/2010/Q8)

 

A.   98^oC

B.    99^oC

C.   100^oC

D.   101^oC

• 98^oC

• 99^oC

• 100^oC

• 101^oC

Which of the following is true about boiling and evaporation of water?

          (SPE/2012/Q7)

• A

• B

• C

• D

Pure water changes its states at different temperatures. Which one of the following is correct?

(SPE/2013/Q9)

• A

• B

• C

• D

Figure below shows an experiment on dissolving salt in water. Which of the following could increase the solubility of salt in water?

(SPE/2010/Q12)

• Decreasing the temperature of water.

• Increasing the temperature of water.

• Stirring the mixture fast.

• Using a larger container.

Which of the following is the solute in carbonated (fizzy) drinks?

(SPE/2014/Q10)

• Carbon dioxide.

• Oxygen.

• Hydrogen.

• Nitrogen.

Salt and sugar can dissolve in water. Which of the following correctly describes salt, sugar and water?(SPE/2018/Q13)

• A

• B

• C

• D

Which of the following sequences is the simplest method used to obtain pure salt from a mixture of salt, iron filings and sand?    (SPE/2010/Q5)

Which of the following sequences is the correct method to separate a mixture of ethanol (alcohol), water and sand into its separate components?

(SPE/2011/Q9)

Which is the correct method to separate coloured dyes?

(SPE/2012/Q8)

• Chromatography.

• Distillation.

• Evaporation.

• Filtration.

Diagram below shows a water cycle in nature. Name the processes that take place at X and Y.

(SPE/2009/Q6)

• X - Condensation

  Y - Evaporation

• X - Evaporation

  Y - Freezing

• X - Evaporation

  Y - Condensation

• X - Evaporation

  Y - Evaporation