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C7 Acids, Bases & Salts_2

Total questions: 40

Worksheet time: 39mins

Name
Class
Date
1.

Silver chloride is an insoluble salt. What would you use to make an insoluble salt?

a)

two different soluble salts

b)

one soluble and one insoluble salt

c)

two different insoluble salts

d)

one acid and one base

2.

Evaporation (heating) of salt solution allows

a)

decomposed salt formed

b)

dry crystals of salt formed

c)

concentrated salt solution formed

d)

diluted salt solution formed

3.

Cooling of concentrated salt solution allows crystals of salt formed because

a)

solubility of salt decreases with temperature

b)

solubility of salt increases with temperature

c)

solubility of salt decreases when temperature increases

d)

solubility of salt increases when temperature decreases

4.

limewater turns cloudy when

a)

carbon dioxide is present

b)

hydrogen is present

c)

water is present

d)

salt is present

5.

copper chloride can be produced when hydrochloic acid reacts with the following, EXCEPT

a)

copper

b)

copper oxide

c)

copper carbonate

d)

copper hydroxide

6.

The word equation for an acid reacting with a metal is

a)

acid + metal →\rightarrow  salt + carbon dioxide + water

b)

acid + base  →\rightarrow  salt + water

c)

acid + metal  →\rightarrow  salt + hydrogen

d)

acid + metal  →\rightarrow  salt + water

7.

Acid rain is caused by

a)

pollutants in the air such as SO2 and NO2 reacting with oxygen

b)

acids in the rain reacting with rocks containing carbonates

c)

pollutants in the air such as SO2 and NO2 reacting with water

d)

global warming, heating the earth's atmosphere

8.

When nitric acid is added to magnesium metal a reaction occurs and a gas is produced. The products of this reaction are:

a)

magnesium nitrate and hydrogen gas.

b)

magnesium carbonate and carbon dioxide.

c)

magnesium chloride and hydrogen gas.

d)

magnesium sulphate and carbon dioxide.

9.

An alkali is produced when

a)

A salt dissolves in water

b)

A base dissolves in water

c)

An acid dissolves in water

d)

An acid reacts with a base

10.

Which of the following is the word equation for the reaction between acids and carbonates?

a)

metal + acid → salt + hydrogen

b)

carbonate + acid → salt + water

c)

carbonate + acid → salt+ carbon dioxide + hydrogen

d)

base + acid → salt + water

11.

Which pH has the most hydrogen ions (H+)?

a)

2

b)

7

c)

10

d)

13

12.

As the number of hydrogen ions (H+) decreases, the pH ___________.

a)

increases

b)

decreases

c)

stays the same

13.

What would happen to the blue and red litmus papers when they are dipped into a sample of acid rain?

a)

Blue litmus paper remains blue and red litmus paper remains red.

b)

Blue litmus paper turns red and red litmus paper turns blue.

c)

Blue litmus paper remains blue and red litmus paper turns blue.

d)

Blue litmus paper turns red and red litmus paper remains red.

14.

Which of these compounds is NOT an acid?

a)

HCl

b)

H2SO4

c)

CH3COOH

d)

H2O

15.

Acids are neutralised by...

a)

Bases

b)

Metals

c)

Water

d)

Hydrogen gas

16.

Bases release...

a)

H+

b)

OH-

c)

H2

17.

Acids release...

a)

H+

b)

OH-

c)

H2

18.

Vinegar CH3COOH is ...

a)

An acid

b)

A base

c)

A salt

19.

H+ + OH- --> H2O Is a chemical equation showing...

a)

A neutralisation reaction

b)

An acid-metal reaction

c)

An acid-carbonate reaction

20.

Identify the salt in the following equation:
Zn(OH)2 + 2HNO3   ---> 2H2O  + Zn(NO3)2

a)
Zn(OH)2
b)
HNO3
c)
H2O
d)
Zn(NO3)2
21.

Universal indicator

a)

turns red in a strong acid

b)

turns orange/yellow in a weak acid

c)

turns green in water

d)

turns blue in a weak alkali

e)

turns purple/violet in a strong alkali

22.
An acid is a substance that produces _____________ when ______________. 
a)
hydrogen ions, dissolved in oil
b)
hydrogen ions, dissolved in water
c)
hydrogen atoms, dissolved in water
d)
hydrogen atoms, dissolved in oil
23.
Which of the following is a positive test for hydrogen gas? 
a)
Splint will continue to burn in presence of hydrogen gas.
b)
Lighted splint extinguishes with no sound. 
c)
A white precipitate is formed when the gas is passed through limewater. 
d)
Lighted splint extinguishes with a 'pop' sound in presence of hydrogen gas. 
24.
What are bases? 
a)
Bases are salts.
b)
Bases are metal hydroxides.
c)
Bases are metal hydroxides soluble in water only. 
d)
Bases are metal hydroxides and metal oxides. 
25.
Are alkalis bases? 
a)
Yes
b)
No
26.

When potassium hydroxide, KOH ionises in water, what are the ions produced?

a)

K⁺ & OH⁻

b)

K²⁺ & OH²⁻

c)

K⁺ & OH²⁻

27.

When sodium hydroxide, NaOH ionises in water forms Na⁺ & OH⁻, it shows

a)

acidic properties

b)

alkaline properties

c)

neutral properties

28.

When nitric acid HNO₃ dissolve in water forming H⁺ & NO₃⁻, it shows

a)

acidic properties

b)

alkaline properties

c)

neutral properties

29.

glacial ethanoic acid does not turn dry blue litmus paper to red. which of the following statements best explains this phenomenon?

a)

the dry litmus paper is too thick

b)

ethanoic acid is insoluble in water

c)

there are no free moving hydroxide ions formed

d)

there are no free moving hydrogen ions formed

30.

when a non-metal oxide dissolves in water, the solution formed is a/an

a)

acid

b)

base

c)

alkali

d)

neutral solution

31.

aluminium oxide has both acidic and basic properties, therefore it is

a)

a base oxide

b)

an acid oxide

c)

a metalloid oxide

d)

an amphoteric oxide

32.

Which organ produces a base for digestion?

a)

stomach

b)

small intestine

c)

spleen

d)

pancreas

33.

Which organ produces an acid to help with digestion?

a)

pancreas

b)

stomach

c)

small intestine

d)

liver

34.

Which is true?

a)

pH of less than 7 is basic; pH of more than 7 is acidic

b)

pH of less than 7 is acidic; pH of more than 7 is basic

35.

Classify the following into soluble and insoluble salts

AgCl

a)

Soluble

b)

Insoluble

36.

Classify the following into soluble and insoluble salts

NaCl

a)

Soluble

b)

Insoluble

37.

Precipitation involves mixing ___________ to form an insoluble solid that separates out from the reaction mixture.

a)

acid and alkali

b)

acid and metal

c)

two acids

d)

two solutions

38.

Bryan wants to prepare silver chloride in the science laboratory. Which of the following reactants should he use?

a)

silver + hydrochloric acid

b)

silver hydroxide + hydrochloric acid

c)

silver nitrate + potassium chloride

d)

silver + chlorine gas

39.

which of the following STATE SYMBOLS should be used for water?

a)

s

b)

l

c)

g

d)

aq

40.

which of the following STATE SYMBOLS should be used for copper sulphate solution?

a)

s

b)

l

c)

g

d)

aq

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