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

© Cambridge University Press 2003, 2006, 2008

7E multiple-choice main test: answers

1

Year 7 multiple-choicemain test: answers

7E Acids and alkalis



2

Question 1

Vinegar is an acid. Like some other acids vinegar tastes...

A) salty

B) sour

C) sugary

D) sweet



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

Question 3The following label is found on a bottle of dilute sodium hydroxide.

The label means that dilute sodium hydroxide is...A) corrosiveB) explosiveC) an irritantD) toxic



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

Question 5

Acids are everywhere. sulfuric acid is a strong acid found in...

A) car batteries

B) lemons

C) milk

D) vinegar



7

Question 6The table shows the colours red cabbage juice turns in acid and alkali.

Red cabbage juice is an example of...A) a baseB) an indicatorC) pHD) a salt



8

Question 7The table shows the result when pieces of red and blue litmus paper are dipped into a solution.

The solution is...A) ammoniaB) hydrochloric acidC) limewaterD) sodium hydroxide



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Question 8The table shows the pH of four different substances.

The most strongly acidic substance is...A) lemon juiceB) soda waterC) stomach acidD) washing-up liquid



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Question 9The table shows the pH of four different substances.

The most weakly alkaline substance is...A) baking powderB) oven cleanerC) soapD) washing soda



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Question 10

A solution of table salt is neutral. The pH of this solution is...

A) 3

B) 5

C) 7

D) 9



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



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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



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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



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Question 14The table shows the colour of universal indicator in four different solutions.

Choose the solution A B C or D which is weakly acidic.



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Question 15The table shows the colour of universal indicator in four different solutions.

Choose the solution A B C or D which is weakly alkaline.



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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



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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



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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



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Question 19

Antacids are indigestion remedies. Antacids are...

A) acids

B) alkalis

C) indicators

D) neutral



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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

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