1. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 1 Year 7 multiple-choice main test: answers 7E Acids and alkalis

2. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 2 Question 1 Vinegar is an acid. Like some other acids vinegar tastes... A)salty B)sour C)sugary D)sweet

3. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 3 Question 2 Acids may be hazardous chemicals. Concentrated hydrochloric acid is hazardous because it is... A)corrosive B)flammable C)oxidising D)toxic

4. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 4 Question 3 The following label is found on a bottle of dilute sodium hydroxide. The label means that dilute sodium hydroxide is... A)corrosive B)explosive C)an irritant D)toxic

5. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 5 Question 4 Some dilute hydrochloric acid is splashed onto a pupil’s hand. The hand should be washed with a large amount of water because it ________ the acid. A)corrodes B)dilutes C)dissolves D)neutralises

6. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 6 Question 5 Acids are everywhere. sulfuric acid is a strong acid found in... A)car batteries B)lemons C)milk D)vinegar

7. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 7 Question 6 The table shows the colours red cabbage juice turns in acid and alkali. Red cabbage juice is an example of... A)a base B)an indicator C)pH D)a salt

8. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 8 Question 7 The table shows the result when pieces of red and blue litmus paper are dipped into a solution. The solution is... A)ammonia B)hydrochloric acid C)limewater D)sodium hydroxide

9. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 9 Question 8 The table shows the pH of four different substances. The most strongly acidic substance is... A)lemon juice B)soda water C)stomach acid D)washing-up liquid

10. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 10 Question 9 The table shows the pH of four different substances. The most weakly alkaline substance is... A)baking powder B)oven cleaner C)soap D)washing soda

11. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 11 Question 10 A solution of table salt is neutral. The pH of this solution is... A)3 B)5 C)7 D)9

12. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 12 Question 11 A few drops of universal indicator are added to a strongly acidic solution. The universal indicator turns... A)green B)purple C)red D)yellow

13. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 13 Question 12 A few drops of universal indicator are added to a strongly alkaline solution. The universal indicator turns... A)blue B)green C)orange D)purple

14. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 14 Question 13 A few drops of universal indicator are added to pure water. The universal indicator turns... A)blue B)green C)orange D)yellow

15. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 15 Question 14 The table shows the colour of universal indicator in four different solutions. Choose the solution A B C or D which is weakly acidic.

16. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 16 Question 15 The table shows the colour of universal indicator in four different solutions. Choose the solution A B C or D which is weakly alkaline.

17. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 17 Question 16 Acids and alkalis can be used to ‘cancel each other out’. The reaction between an acid and an alkali is called... A)combination B)combustion C)decomposition D)neutralisation

18. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 18 Question 17 Dan puts 5 cm 3 of a solution of pH 14 into a test tube. He adds 10 cm 3 of a solution of pH 1. The pH in the test tube... A)becomes zero B)decreases C)increases D)stays the same

19. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 19 Question 18 Bee stings are acidic. Toothpaste can be used to treat the bee sting because it is... A)an acid B)an alkali C)an indicator D)neutral

20. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 20 Question 19 Antacids are indigestion remedies. Antacids are... A)acids B)alkalis C)indicators D)neutral

21. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test: answers 21 Question 20 The soil in a farmer’s field is too acidic to grow healthy plants. To neutralise the soil the farmer adds... A)fertiliser B)lime C)manure D)nutrients