Year 7 multiple-choice main test 7E Acids and alkalis For each question circle the correct answer. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test

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

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

The following label is found on a bottle of dilute sodium hydroxide. 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 © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test

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 © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test

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

Red cabbage juice is an example of... A) a base B) an indicator C) pH 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 © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test

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 © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test

The table shows the pH of four different substances. 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 © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test

The table shows the pH of four different substances. 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 © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test

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

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 © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test

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 © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test

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 © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test

Choose the solution A B C or D which is weakly acidic. 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. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test

Choose the solution A B C or D which is weakly alkaline. 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. © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test

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 © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test

Question 17 Dan puts 5 cm3 of a solution of pH 14 into a test tube. He adds 10 cm3 of a solution of pH 1. The pH in the test tube... A) becomes zero B) decreases C) increases D) stays the same © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test

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 © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test

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

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 © Cambridge University Press 2003, 2006, 2008 7E multiple-choice main test