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IGCSE CHEMISTRY: ACIDS BASES AND SALTS

Total questions: 80

Worksheet time: 40mins

Name
Class
Date
1.

Why do farmers add lime to soil?

a)

It acts as a fertiliser.

b)

It adds nitrogen to the soil.

c)

It decreases the pH of the soil.

d)

It increases the pH of the soil.

2.
What colour is universal indicator in a strong alkali?
a)
Green
b)
Orange
c)
Purple
d)
Red
3.
What colour is universal indicator in strong acid?
a)
Green
b)
Orange
c)
Purple
d)
Red
4.

Which of the following is NOT an acid?

a)

HCl

b)

CH3COOH

c)

C2H6

d)

H2SO4

5.

When magnesium ribbon is added to dilute hydrochloric acid, the followings will occur EXCEPT

a)

Gas bubbles are given off and a "pop" sound is heard when testing with a burning splint.

b)

The metal ribbon disolves to form a colourless solution.

c)

The salt form is magnesium chloride.

d)

The reaction is called neutralisation.

6.

Which of the following metals has NO reaction with a dilute acid?

a)

Copper

b)

Zinc

c)

Calcium

d)

Iron

7.

Which of the following gas will be formed when sodium hydrogencarbonate reacts with dilute hydrochloric acid?

a)

Hydrogen

b)

carbon dioxide

c)

Oxygen

d)

Nitrogen

8.

Whihc of the following statement is True?

a)

The colour of methyl orange in acid solution is yellow.

b)

The basicity of CH3COOH is 4.

c)

H2SO4 is a weak acid.

d)

A strong acid can completely dissociate in water to give H+ ions.

9.

The follwoings are true for an alkali EXCEPT

a)

Bitter taste

b)

Phenolphthalein is red in the solution of an alkali.

c)

Methyl orange is red in the solution of an alkali.

d)

An alkali is a metal oxide or metal hydroxide which is soluble in water.

10.

Which of the following will form a white precipitate?

a)

NaOH(aq) + ZnSO4(aq)

b)

NaOH(aq) + FeSO4(aq)

c)

NH3(aq) + CaSO4(aq)

d)

NH3(aq) + CuSO4(aq)

11.

Which of the followings will give a deep blue solution when sodium hydroxide solution is added in excess?

a)

iron(II) sulphate solution

b)

copper(II) sulphate solution

c)

lead(II) nitrate solution

d)

zinc nitrate solution

12.

Which pH level indicates a weak alkali?

a)

1-3

b)

4-6

c)

8-11

d)

12-14

13.

Identify the correct formulae for the three common lab acids

a)

H2SO4, HNO2, HCl

b)

HCl, HNO3, H2SO3

c)

H2SO4, HCl, HNO3

d)

HNO3, HCl2, H2SO4

14.

An alkali contains ............ ions

a)

hydrogen

b)

hydroxide

c)

OH-

d)

oxonium

15.

The best definition of an acid is

a)

a chemical that tastes sour

b)

a chemical that is corrosive

c)

a chemical that donates H+ ions (a proton donor)

d)

a chemical that donates OH- ions (a hydroxide donor)

16.
What is the meaning of 'pH'?
a)
Positive ion of Hydrogen
b)
Potential of Hydrogen
c)
Product of Hydroxide
d)
None of the above
17.
Which ion determines a base?
a)
H+
b)
OH-
c)
OH+
d)
CO32-
18.

An acid is a...

a)

proton donor

b)

electron donor

c)

electron acceptor

d)

proton acceptor

19.

The formulae of the salt formed when sulfuric acid reacts with aluminium hydroxide is...

a)

Al2(SO4)3

b)

Al3(SO4)2

c)

AlSO4

d)

Al2SO4

20.

The best description of a salt is...

a)

Substance formed on neutralisation

b)

Formed when the hydrogen of an acid is replaced by a metal or ammonium ion

c)

Formed when the hydrogen of an acid is replaced by a metal or NH4

d)

Formed when an acid reacts with an alkali

21.

What would you see if calcium metal was added to excess hydrochloric acid?

a)

Effervescence

b)

Effervescence and calcium dissolving

c)

Calcium dissolving

d)

Effervescence and a colour change

22.

Which of these reactants is the best combination to use to make zinc nitrate?

a)

nitric acid + zinc hydroxide

b)

nitric acid + zinc sulfate

c)

zinc oxide + nitrous acid

d)

zinc chloride + nitric acid

23.

Which of these is the best combination to make zinc chloride?

a)

Zinc carbonate + hydrochloric acid

b)

Zinc nitrate + hydrochloric acid

c)

Sodium chloride + zinc oxide

d)

Calcium chloride + zinc carbonate

24.

What is produced when sodium hydroxide reacts with sulfuric acid?

a)

sodium sulfate and water

b)

sodium sulfate and hydrogen

c)

sodium sulfide and water

d)

sodium sulfate and carbon dioxide

25.

What is an aqueous solution?

a)

only contains water

b)

a solution in which the solvent is water

c)

any liquid

d)

a mixture of gases

26.

Reaction between acid and alkali producing salt and water:

a)

Combustion

b)

Neutralization

c)

Precipitation

d)

Decomposition

27.

Complete the following word equation:

Metalcarbonate + acid -->

a)

Salt + Hydrogen

b)

Salt + Water + Carbon Dioxide

c)

Salt + Water

28.

Complete the following word equation:

Metal + Acid -->

a)

Salt + water

b)

Salt + hydrogen

c)

Salt + Water + Carbon dioxide

29.

How do you remove the water to leave solid copper sulfate crystals?

a)

Filter

b)

Evaporate

c)

Distill

30.

What does the word insoluble mean?

a)

Does dissolve

b)

Doesn't dissolve

c)

Is part of a solid

31.

What colour does the solution turn when sulfuric acid is added to copper carbonate?

a)

Blue

b)

Green

c)

Clear

d)

Purple

32.

What type of reaction produced an insoluble salt?

a)

Neutralisation reaction

b)

Precipitation reaction

c)

Titration reaction

d)

Insoluble reaction

33.

When a soluble salt is formed from an acid and an insoluble base, how do you know when an excess of a base has been added?

a)

When bubbles of gas appear

b)

When the reactant all dissolves

c)

When some of the reactant is left unreacted/undissolved

d)

When a colour change happens

34.

Why do you add excess of the insoluble reactant when making a soluble salt?

a)

To make sure all the acid is used up

b)

To separate the solid from the solution

c)

To make sure a reaction occurs

d)

To have the reaction happen faster

35.

How do you separate an excess insoluble reactant from a solution?

a)

Filtration

b)

Precipitation

c)

Crystalisation

d)

Evaporation

36.

When producing a soluble salt in a reaction between an acid and an alkali, how can you prepare dry solid crystals from the solution?

a)

Filtration

b)

Neutralisation

c)

Condensation

d)

Evaporation/crystallisation

37.

What is the purpose of a titration when making pure salts?

a)

To test if reactants react.

b)

To determine the exact quantities needed for neutralisation

c)

To calculate the concentration of the salt

d)

To test quality of reactants.

38.

When making an insoluble salt, why do we wash the filter paper with distilled water?

a)

to remove insoluble impurities

b)

to remove soluble impurities

c)

to rinse more product through the filter paper

d)

to make a more dilute solution

39.

What is the colour change observed with phenolphthalein when adding acid to alkali?

a)

pink --> colourless

b)

blue --> red

c)

orange --> pink

d)

green --> yellow

40.

Complete the word equation:

acid + metal hydroxide -->

a)

salt + oxygen

b)

salt + carbon dioxide

c)

salt + hydrogen

d)

salt + water

41.

Complete the word equation:

acid + metal oxide -->

a)

salt + water

b)

salt + carbon dioxide

c)

salt + hydrogen

d)

salt + oxygen

42.

Complete the word equation:

acid + carbonate -->

a)

salt + oxygen

b)

salt + carbon dioxide

c)

salt + hydrogen

d)

salt + water + carbon dioxide

43.

Complete the word equation:

magnesium oxide + nitric acid -->

a)

magnesium nitride + water

b)

magnesium nitrate + oxygen

c)

magnesium nitrate+ water

d)

magnesium nitrate + hydrogen

44.

Complete the word equation:

acid + ammonia -->

a)

ammonium salt + water

b)

ammonium salt + oxygen

c)

ammonium salt only

d)

ammonium salt + hydrogen

45.

Complete the word equation:

sodium hydroxide + sulfuric acid -->

a)

sodium sulfate + water

b)

sodium sulfate + hydrogen

c)

sodium sulfate + oxygen

d)

sodium sulfate + hydroxide

46.

Complete the word equation:

copper oxide + hydrochloric acid -->

a)

copper chlorate + water

b)

copper chloride + water

c)

copper hydrochloride + water

d)

no reaction

47.

Complete the word equation:

copper carbonate + nitric acid -->

a)

copper nitrate + water

b)

copper nitrate + hydrogen

c)

copper nitrate + water + carbon dioxide

d)

copper nitrate + carbon dioxide

48.

Which is NOT a step when making insoluble salts?

a)

mix

b)

filter

c)

rinse

d)

crystallise

49.

Which is NOT a step when making soluble salts from insoluble bases?

a)

mix

b)

filter

c)

add indicator

d)

crystallise

50.

What is the test for Carbon Dioxide?

a)

Add Litmus paper

b)

Lime water turning milky

c)

Squeaky pop

51.

Which of the following salts can be prepared by using double decomposition method?

a)

Silver chloride

b)

Barium nitrate

c)

Sodium carbonate

d)

Lead (II) nitrate

52.

Which of the following substances can be used to prepare copper (II) chloride by reaction with hydrochloric acid?


I Copper (II) oxide

II Copper (II) nitrate

III Copper (II) carbonate

IV Copper (II) hydroxide

a)

I, II and III

b)

I, II and IV

c)

I, III and IV

d)

II, III and IV

53.

A few drops of sodium hydroxide, NaOH solution, is added to an aqueous solution. A green precipitate is formed. Which of the following may be present in the solution?

a)

Cu2+

b)

Fe2+

c)

Fe3+

d)

NH4+

54.

A substance, P, dissolves in dilute hydrochloric acid to produce a gas which turn lime water milky. When aqueous sodium hydroxide is added, a brown precipitate is formed. What is probably P?

a)

Iron (III) carbonate

b)

Zinc carbonate

c)

Magnesium carbonate

d)

Lead (II) carbonate

55.

Which ion gives a white precipitate both with aqueous sodium hydroxide and with aqueous ammonia?

a)

Cu2+

b)

Fe2+

c)

Fe3+

d)

Zn2+

56.

The table shows the pH values of four solutions. Which solution produces an exothermic reaction when mixed with a dilute acid?

a)

A

b)

B

c)

C

d)

D

57.

What is the test for Hydrogen gas?

a)

Squeaky pop

b)

Lime water turning cloudy

c)

Add pH paper

58.

Which of the following salts is a not a normal salt?

a)

NaCl

b)

K2SO4

c)

NaHCO3

d)

Ca(NO3)2

59.

Which of the following is not true?

a)

All nitrate salts are soluble.

b)

All group I salts and Ammonium salts are soluble.

c)

All carbonates are not soluble except group I and ammonium salts.

d)

All sulphates are soluble except Copper (II) sulphate, Barium sulphate and Lead (II) sulphate.

60.

Which of the following salts is insoluble?

a)

Aluminium chloride

b)

Copper (II) Sulphate

c)

Sodium chloride

d)

Calcium carbonate

61.

What is the colour of Lead (II) sulphate?

a)

Colourless

b)

Brown

c)

Blue

d)

White

62.

What is the colour of hydrated Copper (II) sulphate?

a)

White

b)

Blue

c)

Pink

d)

Brown

63.

State a reason why filtration is carried out during the preparation of Copper (II) sulphate when copper (II) oxide is added to dilute Sulphuric (VI)?

a)

To dry Copper (II) Sulphate

b)

To remove water

c)

To remove unreacted Copper (II) oxide

d)

To speed up the rate of reaction

64.

Which solution would turn litmus red?

a)

Potassium hydroxide

b)

Sodium chloride

c)

HNO3

d)

Ammonia

65.

Which solution would turn litmus blue?

a)

HCl

b)

Citric fruits

c)

H2SO3

d)

NH3

66.

Phenolphthalein has a pink color in a solution that has a pH of

a)

5

b)

11

c)

1

d)

7

67.

What type of oxide is:

Copper (II) Oxide

a)

Amphoteric Oxide

b)

Basic Oxide

c)

Neutral Oxide

d)

Acidic Oxide

68.

What type of oxide is:

Carbon monoxide

a)

Amphoteric Oxide

b)

Basic Oxide

c)

Neutral Oxide

d)

Acidic Oxide

69.

What type of oxide is:

Carbon Dioxide

a)

Amphoteric Oxide

b)

Basic Oxide

c)

Neutral Oxide

d)

Acidic Oxide

70.

Amphoteric oxides are substances that

a)

Reacts with acids only

b)

Reacts with bases only

c)

Reacts with acids and bases

d)

Do not react with acids or bases

71.
How are metal oxides formed?
a)
When metals react with oxide.
b)
When metals react with water.
c)
When metals react with air.
d)
When metals react with oxygen.
72.

ZnO is an oxide that can react with acids and bases, as shown in the following equations:

ZnO + HSO --> ZnSO + H2O

ZnO +2NaOH -->Na2ZnO2 +H2O


What name is given to an oxide that reacts with both acids and bases?

a)

neutral

b)

acidic

c)

amphoteric

73.

Which of the following oxides is most likely to be an acidic oxide?

a)

CuO

b)

Na2O

c)

MgO

d)

CO2

74.

Which of the following oxides is most likely to be an basic oxide?

a)

Al2O3

b)

H2O

c)

MgO

d)

CO2

75.

Select the statements that are true of basic oxides.

a)

They are oxides of metals.

b)

They dissolve in water to form acids.

c)

They react with acids to form salt and water.

d)

They react with bases to form salts and water.

76.

Select the amphoteric oxides.

a)

aluminium oxide

b)

carbon dioxide

c)

potassium oxide

d)

zinc oxide

77.

Metal oxides are basic because .....

a)

they form alkaline solutions

b)

they form acidic solutions

c)

they are simple

d)

they are dull

78.

What type of oxide is:

Water

a)

Amphoteric Oxide

b)

Basic Oxide

c)

Neutral Oxide

d)

Acidic Oxide

79.

What type of oxide is:

Potassium oxide

a)

Amphoteric Oxide

b)

Basic Oxide

c)

Neutral Oxide

d)

Acidic Oxide

80.

What type of oxide is:

Nitrogen Dioxide

a)

Amphoteric Oxide

b)

Basic Oxide

c)

Neutral Oxide

d)

Acidic Oxide

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