CSEC Chemistry June 2013 P1
I.
II.
III.
IV.
(A)
(B)
(C)
(D)
'f.
6.
neutrons plus protons
neutrons minus protons
electrons plus neutrons
electrons plus protons
Which TWO of the following features are
true about the arrangement of electrons,
protons and neutrons in an atom?
I.
The atomic number of Element Z is 13. In
which group of the periodic table should
Element Z be placed? ..
(A)
(B)
(C)
(D)
7.
Protons and neutrons are found in
the nucleus.
Electrons can be found anywhere
· outside the nucleus.
The number of protons always
equals the number of neutrons.
The number of prot<;ms always
equals the number of electrons.
(A)
(B)
(C)
(D)
(B)
(C)
I and III only
I and IV only
II and III only
II and IV only
(D)
Salt
Base
Alkali
Acid
Match EACH item below with ONE ofthe
options above. Each option may be used
more than once, once or not at all.
Which o'fthe substances above
3.
can be described as the oxide of a metal?
4.
supplies protons as the ONLY positive ions
in aqueous solutions?
5.
is one of the producta in a neutralization
reaction?
atomic number
mass number
relative atomic mass
relative molecular mass
Item 8 refers to the following quantities of
atoms.
I.
II.
III.
Items 3-5 refer to the following types of
substances.
(A)
2
3
4
5
Thearrangementofelementsintheperiodic
table is based on
IY.
..
r:
'Mass number' is the number of
(A)
(B)
(C)
(D)
2.
-2-
~
12 g of carbon
16 g of sulfur
23 g of sodium
12 g of magnesium
(Relative mass number: C = 12; S = 32;
Mg= 24; Na= 23)
8.
Which of the following pairs represents
equal quantities of atoms?
(A)
(B)
(C)
(D)
I and II only
I andIV only
II and III only
II and IV only
-39.
10.
When solid lead nitrate is heated, it decomposes giving offnitrogen(N) oxide and oxygen. The
BALANCED equation for this reaction is
(A)
2Pb(N03)/s) ~ 2PbO(s) + 4N02(g) + 0 2(g)
(B)
Pb(NO,),(s) ~ PbO(s) + N02(g) + 0 2(g)
(C)
Pb(N03),(s) ~ PbO(s) + 2NO,(g) + O,(g)
(D)
2Pb(N0 3) 2(s) ~ PbO(s) + 2N02(g) + 0 2(g)
Which of the following diagrams illustrates
bonding in chlorine?
(A)
11.
0
•
(B)
0
•
Anew element R shows chemical properties
similar to the element sodium. What is the
correct formula ofa compound formed with
R and sulfur?
(A)
RS2
(B)
RS
(C)
R,S
(D)
R,S2
•
0
•
(C)
12.
(A)
(B)
(C)
(D)
•
0
•0
•
13.
(D)
0
•
.An example of a substance with a giant
molecular structure is
diamond
ethyl ethanoate
copper sheet
solid iodine
Which of the following elements can exist
in more than one form in the SAME state?
(A)
(B)
(C)
(D)
Iron
Neon
Iodine
Carbon
-4-
Item 14 refers to the following information.
Element
I
II
III
IV
18.
Atomic Number
One of the ways in which hydrogen
resembles the Group 7 elements is that
hydrogen
3
6
(A)
17
(B)
18
(C)
14.
Which TWO of the elements above when
combined with each other form MAINLY
ionic compounds?
(A)
(B)
(C)
(D)
15.
19.
Which ofthe following features are usually
true of covalent compounds?
m.
Insoluble in water
Existing in the solid state
Easily boiled and melted
(A)
(B)
(C)
(D)
I and II only
I and ill only
II and III only
I, II and III
I.
II.
16.
land II only
I and ill only
II and IV only
ill and IV only
(D)
20.
21.
(A)
(B)
(C)
(D)
17.
Gels
Emulsions
Foams
Suspensions
A separating funnel can be used to separate
a mixture of
(A)
(B)
(C)
(D)
water and ethanol
water and kerosene
watel" and solid wdium chloride
keroaeaeandlOlidlOdiumcbloride
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)
acetic (ethanoic) acid, CH3CO,H
(B)
limestone, eaco,
(C)
slaked lime, Ca(OH),
(D)
sodium chloride, NaCl
Which of the following salts is prepared by
precipitation?
(A)
(B)
(C)
(D)
From which of the following mixtures
can a solid be obtained by the process of
sedimentation?
has atoms that are held together by
electrovalent bonds
donates its one electron very easily
and forms an H+ ion
is one electron short of a rare gas
structure
is a colourless gas like the halogens
Barium sulfate
Calcium chloride
l\1agnesium nitrate
Potassium carbonate
Which ofthe following compounds is NOT
a normal salt?
(A)
(B)
(C)
(D)
Sodium nitrate
Sodium carbonate
Potassium carbonate
Sodium hydrogen carbonate
-522.
A 'weak acid' is BEST described as one
that yields a
(A)
(B)
(C)
(D)
24.
Which of the following salts are soluble in
water?
low reading on the pH meter
low concentration of acid in
aqueous solution
high concentration of hydrogen
ions in solution
low concentration ofhydrogen ions
in aqueous solution
I.
II.
III.
Ammonium carbonate
Calcium sulfate
Lead nitrate
(A)
(B)
(C)
(D)
I and II only
I and III only
II and III only
I, II and III
Item 23 refers to the following equation.
25.
NO,(g) + S02(g) ~ NO(g) + S03(g)
23.
27.
(A)
(B)
(C)
(D)
Which of the following compounds is
reduced?
(A)
N02
(B)
so,
(C)
NO
(D)
so,
Which of the following substances is a
weak electrolyte?
Aqueous ethanoic acid
Dilute hydrochloric acid
Molten lead
Molten lead bromide
'
26.
Which of the following changes to a metal
atom happens when it becomes an ion?
(A)
(B)
(C)
(D)
Gains electrons and is oxidized.
Gains electrons and is reduced.
•
Loses electrons and is oxidized.
Loses electrons and is reduced.
In which of the following reactions is sulfur dioxide acting as an oxidizing agent?
(A)
2S02(g) + 0 2(g)--+ 2S03(g)
(B)
SO,(g) + 2H,S(g) ~ 2H,0(1) + 3S(s)
(C)
S02(g) + H,0(1) ~ H,S03(aq)
(D)
S02(g) + 2HN03(aq) .-+ ~S04 (aq) + 2N02(g)
'.
-6-
Item 28 refers to the following apparatus
which is used to investigate the relative
conductivity of various substances.
31.
Which of the following statements BEST
describes a catalyst?
(A)
6 V d.c. Supply
It increases the activation energy
of a chemicaf reaction.
It alters the quantity of the products
formed.
It is unchanged physically at the
end of a reaction.
It is unchanged chemically at the
end of a reaction.
(B)
r------illllt----.
(C)
Bulb
(D)
Graphite
Graphite rod
rod
---- --- ----28.
32.
An excess of magnesium powder was
added to 50 cm3 of dilute sulfuric acid,
and the reaction was allowed to continue
until no more hydrogen evolved. Which of
the following graphs BEST represents the
complete reaction?
If solutions containing 1 mole of solute per
dm3 of aqueous solution are investigated,
which of the following solutions would
cause the bulb to glow BRIGHTEST?
(A)
(B)
(C)
(D)
29.
Solution under
investigation
Ethanoic acid
Sulfuric acid
Hydrochloric acid
(A)
Time
Which of the following substances does
NOT conduct electricity?
(A)
(B)
(C)
(D)
Volume
of
hydrogen
~onia
Solid calcium
Solid calcium chloride
Molten calcium chloride
Aqueous calcium chloride
•
Volume
of
·
(B)
bydrogeu
Time
30.
Which of the following observations
is expected with the electrolysis of
concentrated sodium chloride solution using
graphite electrodes?
(A)
(B)
(C)
(D)
(C)
Volume
of
hydrogen
(D)
Volume
of
hydrogen
Chlorine is evolved at the anode.
The pH of the solution decreases.
·. Oxygen is evolved at the anode.
Sodium is discharged at the
cathode.
-733.
The condensation of steam is an exothermic
reaction. Which ofthe following statements
are true for this reaction'?
I.
II.
III.
Heat is absorbed.
Heat is evolved.
~ is negative.
(A)
(B)
I and II only
I and III only
II and III only
I, II and III
(C)
(D)
37.
(A)
(B)
(C)
(D)
38.
N 2(g) + 38,(g) ~ 2NH3(g),
~ = -92 kJ mo1-1
•
The notation~ =-92 kJ mo1- means that
92 kJ of energy are
Which of the following elements can be
extracted by chemical reduction?
released during the reaction
required to fonn the bonds in NH3
required forthe reaction to proceed
required to break the bonds in N 2
andH,
(A)
(B)
(C)
(D)
(C)
(D)
Aqueous copper(II) sulfate
Copper
Sulfur
Sodium chloride
When heated, which ofthe following nitrates
decomposes to produce the metal oxide,
oxygen and nitrogen dioxide?
(A)
(B)
· Ammonium nitrate
Copper nilrate
(C)
(D)
Potaaaium nitrate
Sodium nitrate
K
Ca
Fe
Mg
•
40.
Which ofthe following substances conducts_
an electric current and remains chemically
unchanged?
(A)
(B)
36.
can act as a reducing agent
conducts electricity
forms an acidic oxide
is a solid at room temperature
1
(A)
(B)
(C)
(D)
35.
39.
Density
Hardness
Melting point
Electrical conductivity
An element that is a non-metal
(A)
(B)
(C)
(D)
Item 34 refers to the Haber process for the
production of ammonia, according to the
equation
34.
A recently discovered element is thought
. to be a metal. Which of the following
physical properties wou}d BEST confirm
this?
· Which of the following elements would
NOT form an acidic oxide when burnt in
air?
(A)
(B)
(C)
(D)
41.
Carbon
Sulfur
Nitrogen
Magnesium
Which of the following observations is
expected when aqueous silver nitrate is
added to aqueous potassium chloride?
(A)
(B)
(C)
(D)
A pungent gas is evolved.
A blue precipitate appears.
A white precipitate appears.
A brown precipitate appears.
-842.
Which of the following gases is alkaline?
(A)
(B)
(C)
(D)
47.
Ammonia
Carbon dioxide
Nitrogen dioxide
Sulfur dioxide
To which homologous series does the
following structure belong?
H
H
H
I
I
I
H-C-C-C-OH
I
I
H
43.
Ammoniamaybeproducedinthelaboratory
by heating a mixture ofammonium chloride
and
(A)
(B)
(C)
(D)
44.
(C)
(D)
Calcium chloride
Lead nitrate
Zinc sulfate
Sodium carbonate
(C)
(D)
I
H3C-C- CH20H
I
CH2
I
CH3
48.
Aluminium
Copper
Magnesium
Zinc
densities
boiling points
chemical properties
physical properties
Acids
Alkenes
Alkanes
Alcohols
CH3
ALL members ofa homologous series have
similar
(A)
(BJ
(C)
(D)
I
H
Item 48 refers to the compound shown
below.
Which of the following elements is the
MOST electropositive?
(A)
(B)
46.
copper
calcium hydroxide
ammonium sulfate
calcium chloride
Which of the aqueous solutions below
produces a yellow precipitate with aqueous
potassium iodide?
(A)
(B)
45.
(A)
(B)
(C)
(D)
H
49.
Which TWO of the following terms
coFrectly describe the compound shown?
I.
II.
III.
IV.
An alcohol
A branched alkane
Reactive with sodium
-Not reactive with acidified
potassium dichromate
(A)
(B)
(C)
(D)
I and III only
I and IV only
II and III only
II and IV only
The compound which has the formula
~CH= CH C8iC8i c~ is
(A)
(B)
(C)
(D)
an"alkene
an unsaturated acid
a carboxylic acid
a polymer
-9-
so.
(A)
(B)
(C)
(D)
51.
52.
55.
Items 53-54 refer to the following options.
Ethyl ethanoate and fats are classified as
esters. From this information it can be
deduced that BOTH
(A)
(B)
(C)
(D)
are soluble in water
bum with a blue flame
contain the -COOR group
have a pleasant odour
Addition
Isomerism
Esterification
Polymerisation
Each option may be used once, more than
once or not at all to answer the items below.
Which of the following reactions occurs
between propene and bromine?
53.
(A)
(B)
(C)
(D)
What is the name of the process in which
analcoholandacarboxylicacidreactusing
a catalyst?
54.
What is the name of the process in which
proteins are formed from amino acids?
Addition
Condensation
Substitution
. Precipitation
Which of the following compounds would
increaseinmasswhentreatedwithhydrogen
in the presence of nickel?
'
(A)
C,H,
(B)
C)I,
(C)
C 2H,OH
(D)
C,H,CI
RCOOH(aq) + NaOH(aq) ~ RCOONa(aq) + H,0(1)
Which of the following processes CORREC1LY describes the reaction above?
(A)
(B)
(C)
(D)
56.
Precipitation
Neutralization
Reduction
Decomposition
When large alkane molecules are cracked, the products are a mixture of
(A)
(B)
(C)
(D)
small alkane molecules
small alkene molecules
large and small alk:ane molecules
small albne and albine molecules
- 1057.
The MAJOR natural source of alkanes and alkenes is
(A)
(B)
(C)
(D)
petroleum
natural gas
the earth's crust
the atmosphere
58.
The fermentation of sugars, using glucose as the substrate, can be represented by the equation
59.
A protein, X, is hydrolysed, using a dilute acid. The BEST method of separating and identifying
the products is by
(A)
(B)
( C)
(D)
60.
chromatography
crystallization
distillation
fractional distillation
A polymer has the structure
-CHX-C~-CHX-C~-CHX-C~-CHX C~
The formula of the monomer 1s
(A)
XC~-CH,X
(B)
CH3=CHX
(C)
CH3-CH,X
(D)
C~=CHX
END OF TEST
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