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CARIВВЕАN
EXAMINATIONS
01212010
MAY/JUNE 2020
COUNCIL
CARIBBEAN SECONDARY EDUCATION CERTIFICATE®
EXAMINATION
CHEMISTRY
Paper 01
-
General Proficiency
1 hour 15 minutes
75
05 JUNE 2020 (p.m.)
READ THE FOLLOWING INSTRUCTIONS CAREFULLY.
1.
This test consists of 60 items. You will have 1 hour and 15 minutes to answer them.
2.
In addition to this test booklet, you should have an answer sheet.
3.
answers lettered (A),
Each item in this test has four
are about to answer and decide which choice is best.
4.
On your answer sheet, find the number which corresponds to your item and shade the space having
the same letter as the answer you have chosen. Look at the sample item below.
suggested
(B), (C), (D). Read each item you
Sample Item
A005
The SI unit of length is the
(A)
metre
(B)
(C)
(D)
kilogram
Sample Answer
B
(C)
D
second
newton
The best answer to this item is "metre", so (A) has been shaded.
5.
6.
If you want to change your answer, erase it completely before you fill in your new choice.
When you are told to begin, turn the page and work as quickly and as carefully as you can. If you
cannot answer an item, go on to the next one. You may return to that item later.
7.
You may do any rough work in this booklet.
8.
Figures are not necessarily drawn to scale.
9.
You may use a silent, non-programmable calculator to answer items.
DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO DO SO.
Copyright © 2018 Caribbean Examinations Council
All rights reserved.
01212010/MJ/CSEC 2020
-2-
1.
Which of the following processes provide
evidence of the particulate nature of
Items 4-6 refer to the information in the
following table.
matter?
I.
Diffusion
II.
Filtration
III.
Osmosis
(A)
(B)
(C)
(D)
Number
Number
Number
of
of
of
Protons
Electrons
Neutrons
Q
8
8
8
R
16
16
16
S
8
8
9
T
16
18
16
Element
I and II only
I and III only
II and III only
I, II and III
4.
Which of the following elements is an
anion?
2.
'Mass number' is the number of
(A)
(B)
(C)
(D)
(A)
(B)
(C)
(D)
neutrons plus protons
neutrons minus protons
electrons plus neutrons
The arrangement of electrons in atoms of
S
T
(A)
(B)
(C)
(D)
Y?
X
Y
Non-metal
Non-metal
(B)
Non-metal
Metal
(C)
Metal
Non-metal
(D)
Metal
Metal
Which of the following pairs of elements
are
X and Y are 2, 8, 5 and 2, 8, 6 respectively.
Which of the following represents X and
(A)
R
electrons plus protons
5.
3.
Q
6.
(A)
(D)
Q and S
S and T
oxygen
chlorine
nitrogen
sulfur
Which of the following acids will NOT
form an acid salt?
(A)
(B)
(C)
(D)
01212010/MJ/CSEC 2020
Q and R
R and T
Element Q is
(B)
(C)
7.
isotopes?
HPO
H₂CO
HSO
CH CO₂H
GO ON TO THE NEXT PAGE
-3-
8.
An ion with a single negative charge may
Item 12 refers to the information in the
be converted into a neutral atom by
(A)
(B)
(C)
losing a neutron
gaining a proton
losing an electron
gaining an electron
(D)
9.
Atomic Number
I
3
II
6
III
17
IV
18
12.
Which TWO elements above, when
combined with each other, form an ionic
(A)
(B)
2 dm³ of 0.5 mol dm 3 HCI
compound?
2 dm³ of 0.5 mol dm³ H SO
(C)
(D)
1 dm³ of 1.0 mol dm ³ H,SO
1 dm³ of 1.0 mol dm³ CH,COOH
(A)
I and II
(B)
I and III
(C)
(D)
III and IV
II and IV
A separating funnel can be used to separate
a mixture of
(A)
(B)
water and ethanol
(C)
water and solid sodium chloride
Item 13 refers to Compound X, which melts
at 18 °C and boils at 55 °С.
water and kerosene
(D)
11.
Element
Which of the following aqueous solutions
contains 1 mole of hydrogen ions?
10.
following table.
13.
kerosene and solid sodium chloride
Compound X is MOST likely
(A)
(B)
element, R, shows chemical
properties similar to the element sodium.
What is the correct formula of a compound
A new
liquid metal
a giant molecule
a
(C)
a
(D)
an ionic compound
simple molecule
formed with R and sulfur?
14.
(A)
(B)
(C)
(D)
RS,
Which of the following statements BEST
describes the formation of a metallic bond?
R,S
(A)
Anions are held together by
electrons.
(B)
Metal atoms are held together by
anions.
(C)
Metal ions are held together by a
(D)
Cations are held together by a sea
RS
R₂S
sea of anions.
of mobile electrons.
GO ON TO THE NEXT PAGE
01212010/MJ/CSEC 2020
-4-
15.
Covalent
between
compounds can be formed
19.
In which of the following compounds
does hydrogen have a negative oxidation
number?
(A)
a
(B)
(C)
two identical non-metal atoms,
(D)
metal and a non-metal
a positive ion and a
negative ion
(A)
(B)
excluding the noble gases
(C)
(D)
two identical non-metal atoms.
including the noble gases
16.
Graphite can be used as a lubricant because
20.
of the
(A)
17.
loose electrons which can move
NaH
Which of the following when added to
sulfuric acid would be the LEAST suitable
(A)
throughout the lattice
weak attraction among the hexago-
(C)
strong attraction among the hexagonal layers of carbon atoms
(B)
(C)
(D)
nal layers of carbon atoms
strong attraction within the hexagonal layers of carbon atoms
21.
Which set of elements forms molecules
Period 2
(D)
Group 2
Copper(II) oxide
Copper(II) chloride
Copper(II) carbonate
Copper(II) hydroxide
The pH of fresh sugar cane juice, which is
usually 5.0-5.5, can be changed to 7.5-8.0
for more efficient processing by adding
(A)
(B)
(C)
which contain two atoms?
(A)
(B)
(C)
(D)
H,02
NH
method for preparing copper(II) sulfate?
(B)
(D)
CH
acetic (ethanoic) acid, CH,CO,H
sodium chloride, NaCl
slaked lime, Ca(OH)2
limestone, CaCO
Group 7
Period 3
22.
Which of the substances, represented by
the options, A, B, C and D in the following
18.
Which ofthe following halogens is a liquid
table, is MOST likely sodium chloride?
at room temperature?
(A)
(B)
Bromine
(C)
(D)
Chlorine
Substance
01212010/MJ/CSEC 2020
Point
(°C)
Fluorine
Iodine
Boiling
Electrical
Conductivity
Solid
Aqueous
State
State
(A)
1465
No
Yes
(B)
444
No
No
(C)
2600
Yes
No
(D)
-35
No
Yes
GO ON TO THE NEXT PAGE
-5-
Items 27-28 refer to the following table
Items 23-24 refer to the following equation.
showing various tests for gases.
NO,(g) + SO2(g) → NO(g) + SO3(g)
23.
Test
Which of the following compounds is
reduced?
(A)
NO
(B)
(C)
NO
SO,
SO
(D)
(A)
litmus turns red
(B)
Glowing splint
Splint relights
(C)
Damp red
oxidizing agent?
(D)
25.
(D)
Splint
extinguishes
with a pop
NO2
SO2
In answering Items 27-28, each option may
be used once, more than once or not at all.
27.
Nitric acid
Ethanoic acid
Which testcan be used to identify ammonia
gas?
28.
Which test can be used to identify an acidic
gas?
Sulfuric acid
Hydrochloric acid
29.
26.
Lit splint
NO
Which of the following acids is weakly
ionized in aqueous solutions?
(A)
(B)
(C)
(D)
OS
(C)
Damp red
litmus turns
blue
Which of the following compounds is the
(A)
(B)
Damp blue
Damp blue
litmus paper
litmus paper
24.
Observation
Which of the statements below is true for
the following equation?
Which of the following occurs in a metal
atom when it becomes an ion?
(A)
Gains electrons and is oxidized.
Mg(s) +HSO (aq) → MgSO (aq) +H, (g)
(B)
Gains electrons and is reduced.
(C)
Loses electrons and is oxidized.
(A)
Mg is oxidized from oxidation state
(D)
(B)
Mg is reduced from oxidation state
Loses electrons and is reduced.
0 to +2.
+2 to 0.
(C)
Hydrogen is reduced from oxidation
state +2 to 0.
(D)
Hydrogen is oxidized from
oxidation state 0 to +1.
30.
On adding aqueous hydrochloric acid to
a solution in a test tube, a gas is
given off
which extinguishes a burning splint. This
shows the presence of
(A)
(B)
(C)
nitrate ions
(D)
carbonate ions
sodium ions
ammonium ions
GO ON TO THE NEXT PAGE
01212010/MJ/CSEC 2020
-6-
31.
Which of the following will NOT conduct
36.
electricity?
(A)
(B)
(C)
(D)
Which of the following gases will give a
positive test with dry cobalt chloride paper?
(A)
(B)
(C)
(D)
Solid calcium
Solid calcium chloride
Molten calcium chloride
A solution of calcium chloride in
0,
H
CO,
HO
water
Items 37-38 refer to the
32.
An atom with atomic structureX contains
(A)
(B)
(C)
(D)
following chart
showing the conversion of ethene to different
products.
13 protons, 14 neutrons
13 protons, 27 neutrons
POLYETHENE
I
14 protons, 13 neutrons
HO
conc.
27 protons, 13 neutrons
H SO
ETHENE
33.
Which of the following is a list of ALL the
raw materials used in the extraction of iron?
(A)
(B)
(C)
(D)
34.
Br,
Air, iron ore and limestone
Air, coke, cryolite and limestone
Air, coke, iron ore and limestone
Coke, iron ore, bauxite and
limestone
Π
37.
Which of the following metals will NOT
displace hydrogen from dilute hydrochloric
acid?
(A)
Zinc
(B)
(C)
Iron
(D)
35.
Copper
Aluminium
How many coulombs (C) of electricity
38.
The product, polyethene, is a
(A)
(B)
(C)
liquid
(D)
solution
gas
solid
Product I is
(A)
ethane
(B)
(C)
ethanol
(D)
ethanoic acid
ethyl ethanoate
passes through an electrolyte when a
current of 100 A flows for 10 minutes?
(A)
(B)
(C)
(D)
100
600
10 000
60 000
GO ON TO THE NEXT PAGE
-7-
39.
Which of the following diagrams
BEST illustrates bonding in hydrogen
Items 41-42 refer to the
bromide?
W, X, Y and Z, with water or steam. The
table also shows the products formed when
XX
the nitrates of each metal are heated.
X
(A)
following table
which shows the reaction of four metals,
Metals
Reaction with
Water/Steam
Products Formed
When Nitrate is
Heated
XX
XXX
(B)
W
No reaction
Metal, NO₂ and O₂
X
Reacts with
Oxide, NO, and O₂
steam but not
with cold water
Y
Reacts rapidly
Nitrite and oxygen
Reacts slowly
Oxide, NO, and O
with cold water
X
Z
(C)
with cold water
41.
soluble hydroxide?
XX
(A)
(B)
(C)
(D)
X
(D)
42.
40.
A solution, when treated with the gas sulfur
dioxide, becomes green.
contains potassium
(A)
(B)
(C)
(D)
nitrate
sulfate
manganate(VII)
dichromate(VI)
Which of the metals is LIKELY to form a
The solution
W
X
Y
Z
In which of the following pairs of metals is
the first metal MOST likely to displace the
second metal from solution?
(A)
(B)
(C)
(D)
X, Y
Z, X
W, X
Z, Y
GO ON TO THE NEXT PAGE
01212010/MJ/CSEC 2020
-8-
43.
Which ofthe following molecules could be
obtained by cracking the alkane, C¿H18?
1.
CH
II.
CH14
II.
I only
(C)
II and III only
(D)
44.
H-C-C
gas
=
I and II only
45.
H
C-C -H+ Br, → X
H
What is the correct structural formula of
X?
I, II and III
(A)
which is different from the other
H
H
C
C
Br
Br
H
H
H
H
H
H
C
C
C
C
H
Br
H
Br
H
H
H
H
H- C
C
C -
C - H
H-
processes?
(A)
(B)
(C)
(D)
H
H
Which of the following processes produces
a
H
H
C16H34
(A)
(B)
Item 45 refers to the following equation.
Respiration in animals
Photosynthesis in plants
Heating calcium carbonate
(B)
Oxidation of carbon monoxide
(C)
H
H
-
-
-
C
H
_
C
-H
_
H
1
(D)
46.
Br
H
H
Br
H
H
H
H
H- C
C
C
C
H
Br
Br
H
-
H
Which ofthe following compounds contains
a
saturated hydrocarbon?
(A)
(B)
(C)
(D)
Natural gas
Propene
Ethanol
Vinegar
GO ON TO THE NEXT PAGE
01212010/MJ/CSEC 202
-9-
47.
How many isomers of butane,
there?
(A)
(B)
(C)
(D)
C,H1, are
52.
1
(A)
2
(B)
3
(C)
(D)
4
Item 48 refer to the following equation.
53.
(C)
(D)
Copper
Calcium
Magnesium
A suitable drying agent for the laboratory
(A)
(B)
The forward reaction is known as
(A)
(B)
Iron
preparation of ammonia gas is
Organic Acid + AlcoholEster + Water.
48.
Which of the following substances is an
important constituent of chlorophyll?
(C)
synthesis
(D)
hydrolysis
calcium oxide
calcium chloride
anhydrous copper sulfate
concentrated sulfuric acid
esterification
polymerization
Item 54 refers to the following compound.
CH
Items 49-50 refer to the following metals.
(A)
(B)
(C)
Al
(D)
Na
HC
Fe
54.
not at all.
50.
51.
СНОН
strongly alkaline solution?
Which metal has an alloy which is used in
the manufacture of aircraft?
Which of the following substances is
soluble in water?
CH,OH
Which of the following phrases correctly
describes the compound shown?
(A)
An alkane
(B)
An alcohol
(D)
Non-reactive with sodium
(C)
Which metal reacts vigorously with water
(A)
(B)
(C)
(D)
-
CH
may be selected more than once, once or
to produce a
C
CH,
Cu
In answering Items 49-50, a particularmetal
49.
-
55.
A branch alkane
Which of the following observations is
expected when aqueous silver nitrate is
added to aqueous potassium chloride?
(A)
(B)
(C)
(D)
Apungent gas is evolved.
A blue precipitate appears.
A white precipitate appears.
A brown precipitate appears.
C,H
CH
CH,COOC H
GO ON TO THE NEXT PAGE
01212010/MJ/CSEC 2020
-10-
56.
A polyamide is formed by a condensation reaction between a molecule containing
(A)
at least one -COOH group with another containing at least one -NH, group
(B)
at least one -OH group with another containing at least one -COOH group
(C)
(D)
57.
at least one -OH group with another containing at least one -NH, group
two -OH groups with another containing two -COOH groups
Which of the following features is NOT true of all homologous series of compounds?
The members of the series have
(A)
(B)
(C)
(D)
58.
similar chemical properties
the same empirical formula
Which of the following substances can be produced DIRECTLY from ethanol?
I.
Ethene
II.
Ethane
I.
Ethyl ethanoate
(A)
I and II only
(B)
(C)
(D)
59.
the same functional group
the same general formula
I and III only
II and III only
I. II and III
Which of the following statements is TRUE?
(A)
(B)
(C)
(D)
a gas are larger when heated.
in a
The particles in
The particles in a gas are further apart when heated.
The particles in a gas are very closely packed together.
The particles in a gas have strong forces between them.
GO ON TO THE NEXT PAGE
01212010/MJ/CSEC 2020
-11-
Item 60 refers to the following graph which shows the boiling points of some straight-chain
alcohols.
Boiling
points (°С)
250
200
150
100
50
1
2
3
4
5
6
7
8
9
Number of carbon atoms in chain
60.
Which of the following molecular formulae represents the alcohol whose boiling point is 160 °C?
(A)
(B)
(C)
(D)
CH(CH)OH
CH(CH
OH
CH,(CH)OH
CH(CHOH
END OF TEST
IF YOU FINISH BEFORE TIME IS CALLED, CHECK YOUR WORK ON THIS TEST.
01212010/MJ/CSEC 2020