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Acids, Bases and Salts

Total questions: 60

Worksheet time: 1hrs 15mins

Name
Class
Date
1.

Which of the following values would represent the pH of a strong base?

a)

1

b)

8

c)

7

d)

13

2.

Which among the following is not a base?

a)

NaOH

b)

KOH

c)

HCl

d)

NH4OH

3.
Neutralization reactions
a)
formed from joining positive and negative ions 
b)
increases OH ions
c)
froms a salt and water
d)
increases H2O ions
4.

Acids are __________, which means they "eat away" at other materials.

a)

transitional metal

b)

alkaline

c)

flammable

d)

corrosive

5.

Acidic solutions exhibit a higher ratio of H3O+ ions, known as...

a)

neutrons

b)

hydroxide

c)

electrons

d)

hydronium

6.

When you place blue litmus paper into an unknown clear solution, the blue litmus paper turns red.

Which of the following represents the most logical conclusion?

a)

The substance has a pH value of "2".

b)

The substance is a base.

c)

The substance has a pH value of "7".

d)

The substance is acidic.

7.

What range of values on the pH scale represent solutions with a higher ratio of hydroxide (OH-) ions?

a)

below 7

b)

7

c)

above 7

d)

0-14

8.

Identify the products of the following reaction:

CaCO3 + 2HCl -->

a)

Calcium hydrogen carbonate and chlorine gas

b)

Calcium chloride and water

c)

Calcium oxide, carbon dioxide and water

d)

Calcium chloride, carbon dioxide and water

9.

What are acids?

a)

Acids are substances that taste sweet, can dissolve metals (depending on the type of acid) and are acidic in nature.

b)

Acids are substances that taste sour, can dissolve metals (depending on the type of acid) and are acidic in nature.

c)

Acids are substances that taste sour, can dissolve metals (depending on the type of acid) and are basic in nature.

10.

What are Bases?

a)

Bases are substances that are bitter in taste, feel soapy when touched and are acidic in nature.

b)

Bases are substances that are sour in taste, feel soapy when touched and are basic in nature.

c)

Bases are substances that are bitter in taste, feel soapy when touched and are basic in nature.

d)

Acids are substances that are bitter in taste, feel soapy when touched and are basic in nature.

11.

What are the substances used to test whether another substance is acidic or basic in nature?

a)

Spoon

b)

Bases

c)

Acids

d)

Indicators

12.

Which one of these is an indicator?

a)

Litmus Paper

b)

Orange Juice

c)

Shampoo

d)

Lotion

13.

What is the process of Acid and Bases mixed together called?

a)

Explosion

b)

Indication

c)

Inflamation

d)

Neutralisation

14.

Metallic oxides are basic in nature.

a)

True

b)

False

15.

Antacids are used......

a)

to produce acid in the stomach

b)

to produce water in the stomach

c)

to neutralize excess base in the stomach

d)

to neutralize excess acid in the stomach

16.

Which one of the following metals reacts both with acid and base and releases hydrogen gas?

a)

Na

b)

Fe

c)

Zn

d)

Cu

17.

A solution turns red litmus blue, its PH is likely to be

a)

1

b)

4

c)

5

d)

10

18.

If a base dissolves in water by what name is it better known?

a)

neutralization

b)

basic

c)

acid

d)

alkali

19.

What colour would hydrochloric acid turn universal indicator?

a)

orange

b)

yellow

c)

purple

d)

red

20.

Metal oxides are .....

a)

bases only

b)

bases and alkalis

c)

alkalis only

21.

Metal hydroxides are ....

a)

bases only

b)

both bases and alkalis

c)

alkalis only

22.

Which of these general equations are correct?

a)

acid + base makes a salt + water

b)

acid + metal carbonate makes a salt + carbon dioxide + water

c)

acid + metal makes a salt + Hydrogen gas

d)

Acid + metal oxide makes a salt + water

e)

Acid + metal hydroxide makes a salt and water

23.
Complete the following reaction:
Sulphuric acid + sodium carbonate
--> 
a)
Carbon dioxide + water 
b)
calcium carbonate + water + carbon dioxide 
c)
Sodium sulphate + water + carbon dioxide 
d)
Sodium chloride + water + carbon dioxide 
24.
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 
25.
What is the range of pH values in an acidic solution?
a)
0-6
b)
8-14
c)
15-239058204958
d)
pH = 7
26.
A weak acid
a)
is a concentrated solution
b)
dissociates completely
c)
is a dilute solution of OH ions
d)
partially dissociates
27.
A dilute acid
a)
can be either a strong or weak acid
b)
is a weak acid
c)
is a strong acid
d)
a strong base
28.
Salts
a)
formed from joining positive and negative ions
b)
increase OH ions
c)
forms a salt and water
d)
increases H2O ions
29.
Which of the following is a salt: ammonia or sodium chloride?
a)
ammonia 
b)
sodium chloride
30.
A salt is formed when nitric acid combines with sodium hydroxide. What are present in the salt that forms?
a)
Sodium chloride
b)
sodium ions and nitrate ions
c)
only sodium ions
d)
only nitrate ions
31.

True or false: a neutral solution has equal amounts of H+ and OH-.

a)

True

b)

False

32.

Basic oxide

a)

BaO

b)

P2O5

c)

ZnO

d)

CO2

33.
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.
34.
Which of the following reactions produces calcium oxide?
a)
calcium and oxide
b)
calcium and water
c)
calcium and air
d)
calcium and oxygen
35.

Which is NOT an amphoteric oxide?

a)

zinc oxide

b)

aluminium oxide

c)

lead (II) oxid

d)

sodium oxide

36.

Which of the followings is an acidic oxide?

a)

SO2

b)

H2O

c)

CO

d)

ZnO

37.

Sulfuric acid reacts with sodium hydroxide to form salt X and water. Name the salt.

a)

sodium sulphate

b)

sodium nitrate

c)

sodium chloride

38.

Potassium carbonate reacts with an acid Y to form potassium nitrate, water and carbon dioxide. What is the acid used for this reaction?

a)

HNO3

b)

H2SO4

c)

HCl

39.

Ocean water has a pH value near "8". It would be classified as...

a)

slightly acidic

b)

a strong base

c)

a neutral substance

d)

slightly basic (alkaline)

40.

Four solutions are tested and found to have the following pH values. Which of these substances would be considered the weakest acid?

a)

Lemon Juice - pH=2

b)

Apple Juice - pH=4.5

c)

Shower Cleaner - pH=5.5

d)

Hydrogen Peroxide - pH=7

41.
What is the most likely pH of a tube of toothpaste?
a)
3
b)
5
c)
7
d)
9
42.

Mg + H2SO4 ------------> _________ + H2

a)

MgH2

b)

MgS + 2O2

c)

MgSO4

d)

Mg(SO4)2

43.

Na + HNO3 ------------>

a)

Na + H2O + O2

b)

NaH + NO2

c)

Na(NO3)2 + H2

d)

NaNO3 + H2

44.

CaCO3 + HCl ----------->

a)

H2O + CO2

b)

CaCl2 + H2O + CO2

c)

CaCl3 + H2O+ CO2

d)

CaCl3 + H2O + CO

45.

NaHCO3 + H2SO4 ------------> H2O +

a)

CO2

b)

NaSO4 + CO2

c)

Na2SO4 + CO2

d)

Na2(SO4)2 + CO2

46.

Which of the following describes a precipitate?

a)

a liquid forms when a block of metal is heated

b)

a solid forms when one liquid is poured into another

c)

a gas forms when a solid is placed in a liquid

d)

bubbles form when an acid is poured on a rock

47.

ZnO + H2SO4 --------->

a)

ZnSO4 + H2 + O2

b)

Zn(SO4)2 + H2O

c)

Zn(SO4)2 + H2

d)

ZnSO4 + H2O

48.

Ca(OH)2 + 2HNO3 ------->

a)

Ca(NO)3 + H2O

b)

CaNO3 + H2O

c)

Ca(NO3)2 + 2H2O

d)

Ca(NO3)2 + H2O

49.

Complete the reaction.

Ca(OH)2 + 2NH4Cl ----------> CaCl2 +

a)

NH3

b)

NH3 + H2O

c)

NH3 + 2H2O

d)

2H2O + NO2

50.

Which of the following salts is prepared by precipitation method?

a)

sodium chloride

b)

barium sulfate

c)

calcium nitrate

d)

ammonium carbonate

51.

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

52.

After titrating aqueous NaOH with dilute HCl without indicator, what is my next step to obtain a sample of NaCl ?

a)

Filtration

b)

Evaporation to dryness

c)

Repeat the titration

d)

Evaporate to saturation, then cool the solution

53.

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

54.

Which two solutions, when mixed together, will form a precipitate?

a)

dilute hydrochloric acid and barium nitrate

b)

dilute sulfuric acid and sodium hydroxide

c)

dilute hydrochloric acid and lead (II) nitrate

d)

dilute nitric acid and zinc chloride

55.

How can I prepare a sample of copper(II) sulfate?

a)

Add excess Cu metal to H2SO4

b)

Add Cu(NO3)2 (aq) to Na2SO4(aq)

c)

Add excess CuCO3 to H2SO4

d)

Titrate Cu(OH)2 to NaOH

56.

What is a Salt?

a)

Food seasoning

b)

When a hydrogen ion is replaced by a metal to form a compound

c)

When a metal ion is replaced by a hydrogen ion to form a compound

d)

None of the above

57.

Sodium, Potassium and Ammonium salts are insoluble

a)

TRUE

b)

FALSE

58.

Are all nitrates soluble?

a)

YES

b)

NO

59.

All chlorides are soluble

a)

TRUE

b)

FALSE

60.

Which of the following preparation of salt is incorrect?

a)

acid + alkali

b)

acid + metal oxide

c)

acid + carbonate

d)

acid + acid

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