1. © Cambridge University Press 2003, 2006, 2008 7H multiple-choice extension test: answers 1 Year 7 multiple-choice extension test: answers 7H Solutions

2. © Cambridge University Press 2003, 2006, 2008 7H multiple-choice extension test: answers 2 Question 1 A small amount of sugar is dissolved in water. The sugar is called... A)insoluble B)the solute C)a solution D)the solvent

3. © Cambridge University Press 2003, 2006, 2008 7H multiple-choice extension test: answers 3 Question 2 Chewing gum does not dissolve in water. Chewing gum can be dissolved by changing the... A)solubility B)solute C)solution D)solvent

4. © Cambridge University Press 2003, 2006, 2008 7H multiple-choice extension test: answers 4 Question 3 A pupil extracted 3 g of pure, dry salt from 5 g of rock salt. The percentage of salt obtained is... A)3% B)5% C)30% D)60%

5. © Cambridge University Press 2003, 2006, 2008 7H multiple-choice extension test: answers 5 Question 4 Choose the method of extraction that would not be used by a country to obtain common salt. A)crystallisation of sea water B)distillation C)mining D)solution mining

6. © Cambridge University Press 2003, 2006, 2008 7H multiple-choice extension test: answers 6 Question 5 A pupil made a salt solution. He weighed the mass of the liquid before and after the salt was added. The mass of the salt used was... A)2 g B)5 g C)15 g D)50 g

7. © Cambridge University Press 2003, 2006, 2008 7H multiple-choice extension test: answers 7 Question 6 Distillation can be used to separate liquids from solutions because the... A)solute and solvent evaporate B)solute evaporates C)solution evaporates D)solvent evaporates

8. © Cambridge University Press 2003, 2006, 2008 7H multiple-choice extension test: answers 8 Question 7 The chromatogram shows the chromatography results for red, blue and yellow food colourings. It also shows the results for the coatings removed from four different sugar-coated sweets. If someone is allergic to blue food colouring, choose the sweets they could eat. A)W only B)X and Y only C)Y only D)Y and Z only

9. © Cambridge University Press 2003, 2006, 2008 7H multiple-choice extension test: answers 9 Question 8 Choose the graph A B C or D that shows that the solubility of sugar increases as temperature increases.

10. © Cambridge University Press 2003, 2006, 2008 7H multiple-choice extension test: answers 10 Question 9 The solubility of sodium chloride is 36 g in 100 g of water at 20 °C. The mass of sodium chloride that can be dissolved in 25 g of water at 20 °C is... A)9 g B)18 g C)25 g D)36 g

11. © Cambridge University Press 2003, 2006, 2008 7H multiple-choice extension test: answers 11 Question 10 The table shows the solubility of sodium nitrate at two different temperatures. The solubility of sodium nitrate at 20 °C is... A)73 g B)87 g C)103 g D)173 g