Download Prelim Revision Paper 4

CfE
N5
National 5 Chemistry
Prelim Revision 4
Unit 1 Chemical Changes and Structure
Unit 2 Nature’s Chemistry
Unit 3 Chemistry in Society (Polymers)
UNIT 1 Chemical Changes and Structure
Multiple Choice
1.
5.
An atom has 26 protons, 26 electrons and 30
neutrons. The atom has
Which line in the table correctly shows how the
concentration of a solution changes by adding more
solute or by adding more solvent?
A
atomic number 26, mass number 56
B
atomic number 56, mass number 30
C
atomic number 30, mass number 26
D
atomic number 52, mass number 56
6.
What is the charge on the chromium ion in CrCl3?
2.
Fe2O3 + x CO
y Fe + 3CO2
This equation will be balanced when
A
x = 1 and y = 2
B
x = 2 and y = 2
C
x = 3 and y = 2
D
x = 2 and y = 3
A
1+
B
1-
C
3+
D
3-
7.
Which line in the table describes what happens to a
dilute solution of hydrochloric acid when water is
added to it?
3.
Which of the following numbers is the same for
lithium and oxygen atoms?
A
Mass number
B
Atomic number
C
Number of outer electrons
D
Number of occupied energy levels
4.
8.
Which of the following oxides, when shaken with
water, would give an alkaline solution?
Which of the following pairs of elements combine to
form an ionic compound?
A
Calcium oxide
A
Lead and fluorine
B
Nickel oxide
B
Sulphur and oxygen
C
Nitrogen dioxide
C
Carbon and nitrogen
D
Sulphur dioxide
D
Phosphorus and chlorine
UNIT 2 Nature’s Chemistry
Multiple Choice
9.
The table shows the numbers of protons, electrons
and neutrons in four particles, W, X, Y and Z.
11.
The name of the above compound is
Which pair of the particles are isotopes?
A
W and X
B
W and Y
C
X and Y
D
Y and Z
10.
Magnesium and zinc both react with hydrochloric
acid. In which of the following experiments would the
reaction rate be fastest?
A
but-2-ene
B
pent-2-ene
C
but-3-ene
D
pent-3-ene
12.
Which of the following compounds is an isomer of the
one above?
13.
Which of the following represents an ester?
15.
The first three members of the alkyne homologous
series are:
What is the general formula for this homologous series?
A
B
C
D
16.
14.
The properties of fractions obtained from crude oil
depend on the sizes of molecules in the fractions.
Compared with a fraction containing small
molecules, a fraction containing large molecules will
A
be more viscous
B
be more flammable
C
evaporates more rapidly
D
have a lower boiling point range
CnHn
CnHn+1
CnHn+2
CnH2n-2
17.
20.
When methane burns in a plentiful supply of air,
the products are
A
carbon monoxide and water vapour
B
carbon and water vapour
C
carbon dioxide and hydrogen
D
carbon dioxide and water vapour
Which compound is an isomer of the one shown above?
18.
Which of the following hydrocarbons does not
belong to the same homologous series as the
others?
A
CH4
B
C3H8
C
C4H10
D
C6H12
19. Two isomers of butene are:
Which of the following structures represents a third
isomer of butene?
Unit 3 Chemistry in Society
Polymers - Multiple Choice
21.
The
Theflow
flowdiagram
diagramshows
showsthe
themanufacture
manufactureofof
polythene
polythenefrom
fromhydrocarbons
hydrocarbonsinincrude
crudeoiloil
Which line in the table identifies process X, Y and
Z?
22.
Written
1.
(2)
2.
(3)
3.
(3)
4.
(3)
5.
(iii) What does the term unsaturated mean?
1
(4)
6.
1
What is meant by an acid?
(3)