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Acid Base Salt IGCSE

Total questions: 50

Worksheet time: 38mins

Name
Class
Date
1.

An acid is defined as

a)

A proton acceptor

b)

A proton donor

c)

A sour tasting molecule

d)

An ionic compound

2.

A concentrated acid when compared to a dilute sample of the same acid...

a)

Has more molecules of acid dissolved in a given volume of water

b)

Has a lower pH

c)

Has a higher pH

d)

Has fewer molecules of acid dissolved in a given volume of water

3.

A base is...

a)

A substance that reacts with an acid to form a salt

b)

A musical instrument

c)

A proton donor

d)

An H+ ion

4.

An alkali is...

a)

insoluble in water

b)

A water soluble base

c)

the same as an acid

d)

an indigestion tablet

5.

Methyl orange is what colour in an acid?

a)

green

b)

blue

c)

orange

d)

red

6.

phenolphthalein at pH 4 is

a)

pink

b)

purple

c)

clear

d)

colourless

7.

universal indicator is green at pH

a)

2

b)

5

c)

7

d)

11

8.

blue litmus paper will remain blue when

a)

added to an acid

b)

added to an alkali

c)

added to water

d)

added to a neutral substance

9.

Arrhenius acids __________.

a)

dissociate to make H+ ions in solution

b)

dissociate to make OH- ions in solution

c)

are proton acceptors

d)

have pH values higher than 7

10.

Which of the following products would result from NH3 acting as a bronsted base when reacting with water:

NH3 + H2O --> ____________

a)

NH4 + OH

b)

NH4+ + OH-

c)

NH2 + H3O

d)

NH2- + H3O+

11.

The process of adding a known solution to determine the concentration of another, unknown solution is called ____.

a)

combustion

b)

hydrolysis

c)

titration

d)

indication

12.
HSO4-(aq)+H2O(l)      →       H3O+(aq)+SO42-(aq)
Identify the Acid in the above reaction.
a)
HSO4-
b)
H2O
c)
H3O+
d)
SO42-
13.

What type of oxide is:

Copper (II) Oxide

a)

Amphoteric Oxide

b)

Basic Oxide

c)

Neutral Oxide

d)

Acidic Oxide

14.

What type of oxide is:

Carbon monoxide

a)

Amphoteric Oxide

b)

Basic Oxide

c)

Neutral Oxide

d)

Acidic Oxide

15.

What type of oxide is:

Carbon Dioxide

a)

Amphoteric Oxide

b)

Basic Oxide

c)

Neutral Oxide

d)

Acidic Oxide

16.

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

17.

A metal oxide and an acid reacted together to form zinc chloride and water. What were the metal oxide and the acid?

a)

Zinc oxide and hydrochloric acid

b)

Zinc metal and hydrochloric acid

c)

Zinc oxide and sulfuric acid

d)

Zinc chloride and zinc oxide

18.

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.

19.

Select the amphoteric oxides.

a)

aluminium oxide

b)

carbon dioxide

c)

lead(II) oxide

d)

potassium oxide

e)

zinc oxide

20.

What type of oxide is:

Water

a)

Amphoteric Oxide

b)

Basic Oxide

c)

Neutral Oxide

d)

Acidic Oxide

21.

What type of oxide is:

Nitrogen Dioxide

a)

Amphoteric Oxide

b)

Basic Oxide

c)

Neutral Oxide

d)

Acidic Oxide

22.

What type of oxide is:

Potassium oxide

a)

Amphoteric Oxide

b)

Basic Oxide

c)

Neutral Oxide

d)

Acidic Oxide

23.

Which method can be used to prepare insoluble salts?

a)

add excess solid reagents to acid

b)

precipitation

c)

titration

24.

Select the salts that can be prepared by precipitation.

a)

sodium chloride

b)

silver chloride

c)

lead(II) chloride

d)

magnesium chloride

e)

zinc chloride

25.

Which of the following briefly summarize the correct sequence of precipitation method?

a)

dry, filter, mix, wash

b)

filter, wash, mix, dry

c)

mix, filter, wash, dry

d)

wash, mix, filter, dry

26.

Select the reagents that can be used to prepare zinc chloride.

a)

hydrochloric acid

b)

sulfuric acid

c)

zinc oxide

d)

zinc hydroxide

e)

zinc carbonate

27.

Select the salts that can be prepared by reacting excess solid reagents with acid.

a)

potassium sulfate

b)

calcium sulfate

c)

copper(II) sulfate

d)

lead(II) sulfate

e)

iron(II) sulfate

28.

Why we cannot use the element copper itself to react it with acid?

a)

It is too dangerous to perform since copper is very reactive

b)

Copper takes very long to react

c)

There won't be a reaction since copper is unreactive

29.

which reaction are true

a)

Metal + acid –> salt + water

b)

Metal oxide + acid –> salt + water

c)

Metal carbonate + acid –> salt + water + carbon dioxide

d)

Metal carbonate + acid –> salt + water + hydrogen

30.

How would you prepare a sample of potassium chloride safely in the laboratory?

a)

Add excess potassium metal to dilute hydrochloric acid

b)

Titrate dilute HCl with aqueous KOH with an indicator

c)

Titrate dilute HCl with aqueous KOH once with indicator, then again without

d)

Mix aqueous potassium nitrate with aqueous sodium chloride

31.

Which of the following methods is used to prepare zinc sulfate?

a)

Add excess zinc chloride to aqueous sodium sulfate

b)

Tiltrate dilute H2SO4 with aqueous Zn(OH)2 with an indicator, then again without

c)

Add excess solid zinc oxide to dilute sulfuric acid

d)

Mix aqueous zinc nitrate with aqueous potassium sulfate

32.

After adding aqueous Ca(NO3)2 to dilute H2SO4, what is my next step to prepare a sample of CaSO4?

a)

Crystallisation

b)

Evaporation to dryness

c)

Filtration to get the filtrate

d)

Filtration to get the residue

33.

Sodium, Potassium and Ammonium salts are insoluble

a)

TRUE

b)

FALSE

34.

Are all nitrates soluble?

a)

YES

b)

NO

35.

Which method is used to prepare soluble salts from Group 1?

a)

Electrolysis

b)

Titration

c)

Haber Process

d)

Precipitation method

36.

All chlorides are soluble

a)

TRUE

b)

FALSE

37.
Which type of ion does a base produce when it is dissolved in water?
a)
oxide
b)
oxygen
c)
hydrogen
d)
hydroxide
38.

Which of the following statements best define the term ‘salt’?

a)

Salt is formed when metal reacts with an alkali.

b)

Salt contains sodium ions and chloride ions.

c)

Salt is formed from a weak Van der Waals’ forces of attraction.

d)

Salt is formed when the hydrogen ions in an acid is replaced by metal or ammonium ions.

39.

Using solution X, a student successfully tested for the presence of chloride ions. What is solution X and the result of the test?

a)

solution X is dilute sulphuric acid and the result is a yellow precipitate

b)

solution X is dilute sulphuric acid and the result is a white precipitate

c)

solution X is silver nitrate solution and the result is a yellow precipitate

d)

solution X is silver nitrate solution and the result is a white precipitate

40.

When dilute acid was added to an unknown sample, effervescence was observed. Which anion is present?

a)

ammonium ion

b)

carbonate ion

c)

nitrate ion

d)

sulfate ion

41.

As a gas was bubbled through limewater, this was observed. What is the identity of the gas?

a)

hydrogen

b)

ammonia

c)

oxygen

d)

carbon dioxide

42.

A colourless pungent gas turns damp red litmus paper blue. What is the identity of the gas?

a)

hydrogen

b)

ammonia

c)

oxygen

d)

carbon dioxide

43.

When dilute nitric acid, followed by barium nitrate solution was added to an unknown sample, a white precipitate was observed. Which anion is present?

a)

chloride ion

b)

carbonate ion

c)

nitrate ion

d)

sulfate ion

44.

Adding sodium hydroxide followed by Al foil to an unknown solution, and warming it, is a test for which anion?

a)

ammonium ion

b)

carbonate ion

c)

nitrate ion

d)

sulfate ion

45.

This is the setup to test for which gas?

a)

hydrogen

b)

ammonia

c)

oxygen

d)

carbon dioxide

46.

What is the chemical name for limewater?

a)

sodium hydroxide

b)

calcium hydroxide

c)

potassium hydroxide

d)

ammonium hydroxide

47.

What is the colour of anhydrous copper sulphate?

a)

Blue

b)

Green

c)

White

d)

bluish green

48.
A compound is a hydrate when it...
a)
is composed of only hydrogen and oxygen
b)
is a state of water
c)
traps water inside of the compound
d)
repels water from the compound
49.

What is the best method for removing water from a hydrated compound?

a)

freezing

b)

filtration

c)

distillation

d)

heating

50.
Name the following ionic compound: MgSO4*7H2O
a)
magnesium sulfate * hexahydarte
b)
magnesium sulfate hexahydarte
c)
magnesium sulfate heptahydrate
d)
magnesium sulfate* heptahydrate

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