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C7 Acids, Bases & Salts_1

Total questions: 40

Worksheet time: 28mins

Name
Class
Date
1.

Which of the following is a base?

a)

copper chloride

b)

copper sulfate

c)

copper

d)

copper oxide

2.

What is the meaning of the above hazard warning symbol?

a)

Corrosive

b)

Explosive

c)

Toxic

d)

Radioactive

3.

Acid in our stomach:

a)

Hydrochloric acid

b)

Sulfuric acid

c)

Acetic acid

d)

Carbonic acid

4.

Acids taste .....

a)

sour

b)

bitter

c)

sweet

d)

umami

5.
Acid + base --> ?
a)
salt + hydrogen gas + water
b)
salt + carbon dioxide + water
c)
salt + water
d)
salt only
6.
Which of the following pH numbers indicates a neutral substance?
a)
1
b)
5
c)
7
d)
14
7.
What colour is universal indicator in a neutral solution?
a)
Green
b)
Orange
c)
Purple
d)
Red
8.
What colour is universal indicator in strong acid?
a)
Green
b)
Orange
c)
Purple
d)
Red
9.
Strong acids and strong alkalis are.......
a)
Able to turn blue litmus paper red
b)
Corrosive and/or caustic
c)
Sour
d)
Sweet
10.
The pH of a strong acid would be:
a)
1-2
b)
5-6
c)
8-9
d)
12-13
11.
The pH of a strong base would be:
a)
1-2
b)
5-6
c)
8-9
d)
13-14
12.
According to the image, the substance tested is a...
a)
Acid
b)
Neutral
c)
Strong Acid
d)
Base
13.
According to the image, the substance tested is a...
a)
Acid
b)
Base
c)
Neutral
d)
Strong Acid
14.
Which of the following word pairs correctly completes the sentence below?
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.
a)
Acids; pH less than 7
b)
Acids; pH greater than 7
c)
Bases; pH greater than 7
d)
Bases; pH less than 7
15.
Why is universal indicator more accurate than litmus indicator?
a)
a) Only 1 piece of paper need for universal indicator.
b)
b) Universal indicator can has more colours available
c)
c) Universal indicator can distinguish between strong and weak solutions.
d)
d) Universal indicator can identify neutral solutions.
16.

Is salt an acid or an alkali?

a)

Acid

b)

Alkali

c)

Can be either depending on the situation

d)

Neither

17.

Which of the following is the strongest base?

a)

oven cleaner - 13.5

b)

lemon juice - 2.5

c)

soap - 10

d)

blood - 7.4

18.

Which of the following is the weakest base?

a)

oven cleaner - 13.5

b)

lemon juice - 2.5

c)

soap - 10

d)

blood - 7.4

19.

A scientist runs tests on an unknown substance. He finds that it is extremely corrosive. It produces H+ ions in solution. And, it has a pH of 1. What type of substance has he identified?

a)

weak acid

b)

strong acid

c)

weak base

d)

strong base

20.

A substance is found to have the following characteristics:


Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

c)

enzyme

d)

fatty acid

21.

what is pH 7 ?

a)

acid

b)

alkaline

c)

water

22.
Which acid was used to make the salt magnesium sulphate?
a)
hydrochloric acid
b)
sulphuric acid
c)
nitric acid
d)
formic acid
23.

What is the product of neutralisation?

a)

Carbon dioxide

b)

Salt

c)

Water

d)

Hydrogen

24.
Which sentence below best describes how the pH changes when an alkali is neutralised by an acid?
a)
The pH stays the same
b)
The pH stays the same but then drops rapidly to pH 7.
c)
The pH drops gradually as more and more acid is added to the mixture.
d)
The pH goes straight to 7 as soon as any of the acid is added.
25.
Ca(OH)2 is an example of a(n)
a)
Acid
b)
Base
c)
Neutral
26.
Complete the following reaction:
Hydrochloric acid + magnesium hydroxide --> 
a)
Magnesium chloride + water 
b)
Magnesium + water
c)
Magnesium chloride + hydrogen gas 
d)
Magnesium chloride + water + carbon dioxide 
27.
What are the names of the products when you mix an equal strength acid and alkali together?
a)
Water and Sodium Hydroxide
b)
Water and Salt
c)
Water and Hydrochloric Acid
d)
Water and Hydrochloric Acid
28.
What are the names of the products when you mix an equal strength acid and alkali together?
a)
Water and Sodium Hydroxide
b)
Water and Salt
c)
Water and Hydrochloric Acid
d)
Water and Hydrochloric Acid
29.
Bases will turn litmus paper __________, while acids will turn litmus paper __________.
a)
blue.....red
b)
red.....blue
c)
pink.........colourless
d)
colourless..........pink
30.
What salt is produced if you react sodium hydroxide with hydrochloric acid?
a)
sodium hydroxide
b)
sodium sulfate
c)
sodium nitrate
d)
sodium chloride
31.
A salt is formed when nitric acid combines with sodium hydroxide. What is the name of the salt?
a)
Sodium chloride
b)
Sodium nitrate
c)
Hydrogen Nitrate
d)
Nirate
32.
The products of a neutralisation reaction are lithium sulfate and water. What is the name of the acid used to neutralise the alkali lithium hydroxide?
a)
hydrochloric acid
b)
sulfuric acid
c)
nitric acid
d)
phosphoric acid
33.

Name the salt produced when : Sodium hydroxide + sulphuric acid —> ...?

a)
sodium carbonate
b)
sodium sulphate
34.
nitric acid
a)
HNO2
b)

HNO3

c)

H2NO4

d)

H2NO

35.
sulfuric acid
a)
HSO3
b)
H2SO3
c)

H2SO4

d)

H3SO4

36.
hydrochloric acid
a)
HCl
b)

HCl2

c)

H2Cl4

d)

HCl3

37.

Which of the following is/are true about amphoteric oxides?

a)

reacts with acidic oxides

b)

reacts with basic oxides

c)

does not with acidic oxides

d)

does not with basic oxides

38.

Which of the following is/are true about basic oxides?

a)

reacts with acidic oxides

b)

reacts with basic oxides

c)

does not with acidic oxides

d)

does not with basic oxides

39.

Which of the following is/are true about acidic oxides?

a)

reacts with acidic oxides

b)

reacts with basic oxides

c)

does not with acidic oxides

d)

does not with basic oxides

40.

Which of the following is/are true about neutral oxides?

a)

reacts with acidic oxides

b)

reacts with basic oxides

c)

does not with acidic oxides

d)

does not with basic oxides

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