© cambridge university press 2003, 2006, 2008 7e multiple-choice main test: answers 1 year 7...
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© Cambridge University Press 2003, 2006, 2008
7E multiple-choice main test: answers
1
Year 7 multiple-choicemain test: answers
7E Acids and alkalis
© 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
© 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
© Cambridge University Press 2003, 2006, 2008
7E multiple-choice main test: answers
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
© 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
© 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
© Cambridge University Press 2003, 2006, 2008
7E multiple-choice main test: answers
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
© Cambridge University Press 2003, 2006, 2008
7E multiple-choice main test: answers
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
© Cambridge University Press 2003, 2006, 2008
7E multiple-choice main test: answers
9
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
© Cambridge University Press 2003, 2006, 2008
7E multiple-choice main test: answers
10
Question 9The table shows the pH of four different substances.
The most weakly alkaline substance is...A) baking powderB) oven cleanerC) soapD) washing soda
© 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
© 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
© 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
© 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
© Cambridge University Press 2003, 2006, 2008
7E multiple-choice main test: answers
15
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.
© Cambridge University Press 2003, 2006, 2008
7E multiple-choice main test: answers
16
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.
© 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
© Cambridge University Press 2003, 2006, 2008
7E multiple-choice main test: answers
18
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: 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
© 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