MTAu / Form 4 / 2nd term Exam 99-00 / Chemistry / Paper II /
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Hoi Ping Chamber of Commerce Secondary School
Final Term Examination 99/00
Chemistry Paper II
11.00 am – 12.00 am (1 hour)
1.
2.
3.
ANSWER ALL QUESTIONS. All the answers should be marked on the Answer Sheet.
Note that you may only mark ONE answer to each question. Two or more answers will
score NO MARKS.
All questions carry equal marks. No marks will be deducted for wrong answers.
There are 50 questions in this paper.
1. Which of the following diagrams can
represent a mixture of two elements ?
4.
In the above experiment, a gas is
evolved and burns at the jet. Metal X is
probably
2.
Element X has an isotope
31
15
X . Which
of the following statements is/are
correct ?
(1) X belongs to Group V of the
Periodic Table.
(2) X can react with oxygen to form an
ionic compound.
(3)
3.
31
15
5.
A.
zinc.
B.
aluminium.
C.
magnesium.
D.
copper.
X and Y are elements. The melting
points of their chlorides are given
below :
Melting point (C)
X has 16 neutrons.
A.
(1) only
B.
C.
D.
(2) only
(1) and (3) only
(2) and (3) only
Chloride of X
586
Chloride of Y
0
Which of the following statements is
correct ?
Which of the following molecules has
the greatest number of lone pairs of
electrons ?
A. chlorine
B. hydrogen
C. nitrogen
D. oxygen
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A.
Both X and Y are metals.
B.
The chloride of Y is a solid at room
temperature.
C.
The
chloride
of
X
conducts
electricity in the solid state.
D.
The chloride of Y is a covalent
compound.
MTAu / Form 4 / 2nd term Exam 99-00 / Chemistry / Paper II /
6.
Which of the following elements can
9.
Aluminium is used to make window
react together to form a covalent
frames because
compound ?
(1) it is strong.
(1) neon
(2) it can resist corrosion.
(2) hydrogen
(3) it is the most abundant metallic
(3) sulphur
7.
element in the earth crust.
(4) potassium
Which of the above statements are
A.
(1) and (2) only
correct ?
B.
(1) and (4) only
A.
(1) and (2) only
C.
(2) and (3) only
B.
(1) and (3) only
D.
(3) and (4) only
C.
(2) and (3) only
D.
(1), (2) and (3)
Consider the following information :
Substance Melting
point /C
Electrical
Solubility
conductivity at
in water
10. Which of the following metals are
present in 14 carat gold ?
(1) Chromium
room temperature
W
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- 53.5
Poor
Slightly
(2) Copper
soluble
(3) Silver
X
61
Poor
Insoluble
A.
(1) and (2) only
Y
232
Good
Insoluble
B.
(1) and (3) only
Z
782
Poor
Very
C.
(2) and (3) only
soluble
D.
(1), (2) and (3)
Which of the above substances exists as
a simple molecular solid at room
11. In each of the four solutions shown
below, a strip of zinc is added.
temperature ?
8.
A.
W
B.
X
C.
Y
D.
Z
Which of the following statements
concerning helium is/are correct ?
(1) The outermost electron shell of a
Which of the following combinations is
helium atom has an octet structure.
correct ?
(2) Helium is used to fill weather
Tube
Observation
A.
I
No change
molecules.
B.
II
Brown coating on zinc
A.
(1) only
C.
III
No change
B.
(2) only
D.
IV
Grey coating on zinc
C.
(1) and (3) only
D.
(2) and (3) only
balloons.
(3) Helium
exists
as
monatomic
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MTAu / Form 4 / 2nd term Exam 99-00 / Chemistry / Paper II /
12. Consider
the
following
chemical
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15.
equation :
O2(g)+ 4Fe(OH)2(x)  2Fe2O3(y) + 4H2O(z)
Which of the following combinations is
correct ?
x
y
z
A.
s
s
l
B.
s
aq
aq
C.
aq
s
aq
D.
aq
aq
l
Which of the following metals would
produce the largest voltage in the
above set-up ?
A.
iron
B.
aluminium
C.
copper
D.
magnesium
13. In which of the following processes will
lead be produced ?
(1) the electrolysis of molten lead(II)
bromide
(2) heating lead(II) oxide strongly
(3) adding
magnesium
to
lead(II)
16. In which of the following reactions is
the underlined reactant reduced ?
A. Pb2+ + 2OH-  Pb(OH)2
B. CO2 + 2Mg  2MgO + C
C. 2NH3 + 3CuO  3Cu + N2 + 3H2O
nitrate solution
A.
(1) only
B.
(2) only
C.
(1) and (3) only
D.
(2) and (3) only
D.
14. Brass is commonly used for making
ornaments because
(1) it has an attractive appearance.
(2) It can resist corrosion.
(3) It is softer than copper.
Which of the following combination is
correct ?
Mg + 2AgNO3  Mg(NO3)2 + 2Ag
17. Which of the following statements
concerning iodine and chlorine is
INCORRECT ?
A. They exist as diatomic molecules.
B. Their atoms have the same number
of outermost shell electrons.
C. They form ions with a single
negative charge.
D. Iodine is a stronger oxidizing agent
than chlorine.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
18. A student mix equal volumes of
acidified
potassium
permanganate
solution and iron(II) sulphate solution
together. Which of the following
statements about the reaction is
INCORRECT ?
A. The colour of acidified potassium
permanganate solution fades.
B. Permanganate ion is reduced.
C. Hydrogen ion is oxidized.
D. Iron(II) ion is oxidized.
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MTAu / Form 4 / 2nd term Exam 99-00 / Chemistry / Paper II /
19. Consider the
equation :
following
chemical
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24. Which of the following statements
concerning citric acid is/are correct ?
(1) It is a strong acid.
(2) It is present in oranges.
(3) It exists as a solid at room
temperature.
20. Consider the following table :
Element
W
X
Y
Z
Atomic number
6
11
17
18
Which of the following elements is
likely to be an oxidizing agent ?
A. W
B. X
C. Y
D. Z
21. Using 1 mole of reactant, which of the
CrO4 (aq)  Cr (aq)
B.
Cr2O72-(aq)  Cr3+(aq)
C.
MnO4-(aq)  Mn2+(aq)
D.
MnO4 (aq)  MnO2(s)
(2) only
C.
(1) and (3) only
D.
(2) and (3) only
hydrochloric acid to give a gas. The
solid is probably
A.
calcium oxide.
B.
calcium carbonate.
C.
sodium hydroxide.
D.
sodium carbonate.
26. Potassium
permanganate
solution
acidified with dilute sulphuric acid is a
commonly-used oxidizing agent. Dilute
3+
nitric acid is not used to acidify
potassium
permanganate
solution
because
2-
A.
22. Consider the following flow diagram :
CuO(s)
B.
an alkaline solution reacts with dilute
highest number of electrons ?
A.
(1) only
25. A white solid dissolves in water to give
following chemical changes involves the
2-
A.
Reactant X
Cu(s)
Reactant Y
nitric acid is more expensive than
sulphuric acid.
B.
Cu2+(aq)
dilute nitric acid is an oxidizing
agent and would react with the
reducing agent.
Which of the following combinations is
C.
correct ?
nitric
acid
decomposes
more
readily than sulphuric acid.
Reactant X
Reactant Y
A.
H2(g)
dilute H2SO4
B.
CO(g)
dilute HNO3
C.
Mg(s)
dilute HCl
D.
C(s)
concentrated HCl
D.
dilute nitric acid would react with
potassium permanganate solution.
27. Which of the following substances are
commonly found in the waste water
produced by electroplating factories ?
(1) acids
23. Which of the following substances has a
pH less than 7 ?
(2) alkalis
(3) cyanides
A.
lemon juice
A.
(1) and (2) only
B.
soap solution
B.
(1) and (3) only
C.
glass cleaner
C.
(2) and (3) only
D.
milk of magnesia
D.
(1), (2) and (3)
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MTAu / Form 4 / 2nd term Exam 99-00 / Chemistry / Paper II /
Directions : Q.28 and Q.29 refer to the
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31. A sample of concentrated sulphuric acid
has a density of 1.83 g cm-3 and contains
following experiment.
94.0 % of sulphuric acid by mass. What
is the concentration (correct to one
decimal place) of sulphuric acid in the
sample ?
(Relative atomic masses :
H=1.0 , O=16.0 , S=32.1)
28. Which of the following combinations is
A.
17.5 M
B.
18.3 M
C.
18.7 M
D.
19.8 M
correct ?
Gas X
Gas Y
A.
chlorine
hydrogen
B.
chlorine
oxygen
C.
hydrogen
chlorine
(1) sodium hydroxide solution
D.
oxygen
hydrogen
(2) concentrated nitric acid
32. Which of the following reagents can be
used to distinguish between Fe2+(aq) and
Fe3+(aq) ions ?
(3) ammonia solution
29. Which of the following statements
A.
(1) and (2) only
concerning the above experiment is/are
B.
(1) and (3) only
correct ?
C.
(2) and (3) only
D.
(1), (2) and (3)
(1) Platinum
electrodes
should
be
used.
(2) The concentration of Na+(aq) ions
33. Metal X reacts with dilute nitric acid to
around the cathode increases.
(3) The
solution
changes
give a colourless solution. When sodium
from
hydroxide solution is added to the
colourless to pink.
solution, a white precipitate which
A.
(1) only
dissolves in excess sodium hydroxide
B.
(2) only
solution is formed. X is probably
C.
(1) and (3) only
A.
copper.
D.
(2) and (3) only
B.
iron.
C.
zinc.
D.
magnesium.
30. Which of the following can be used to
distinguish between dilute hydrochloric
acid and dilute nitric acid ?
(1) copper
(2) silver nitrate solution
(3) Copper(II) carbonate solution
A.
(2) only
B.
(1) and (2) only
C.
(1) and (3) only
D.
(2) and (3) only
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MTAu / Form 4 / 2nd term Exam 99-00 / Chemistry / Paper II /
34. The following experimental results were
performed
a
titration
experiment in which she added an acid
react with 2 M NaOH and 4 M HCl was
from a burette to an alkali contained in a
reacted with 4M NaOH respectively :
conical flask. The following diagrams
No.
show the initial and final readings of the
Volume of
Rise in
alkali
temperature
acid
100 cm3 of 100 cm3 of
2 M HCl
2
student
obtained when 2 M HCl was allowed to
Expt. Volume of
1
37. A
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burette.
T1C
2 M NaOH
100 cm3 of 100 cm3 of
4 M HCl
T2C
4 M NaOH
Which of the following is correct ?
A.
T1 = T2
B.
T1 = 2T2
What was the volume of the acid added
C.
2T1 = T2
from the burette to the conical flask ?
D.
4T1 = T2
A.
28.5 cm3
B.
28.6 cm3
Directions : Q.35 and Q.36 refer to the
C.
28.7 cm3
following experiment :
D.
28.9 cm3
A silver coin, with a mass of 12.00 g, was
38. One mole of calcium chloride contains
dissolved completely in concentrated nitric
A.
3 moles of atoms.
acid.
chloride
B.
1 mole of cations.
solution was added to the resulting solution,
C.
1 mole of molecules.
14.35 g of a white precipitate [AgCl(s)] were
D.
2 moles of ions.
When
excess
potassium
obtained.
39.
35. Which of the following equations
correctly
represents
the
reaction
between silver and concentrated nitric
acid ?
A.
Ag + 2H+ + NO3-  Ag+ + NO2 + H2O
B.
Ag + 4H+ + 4NO3-  Ag+ + 4NO2 + O2 + 2H2O
C.
3Ag + 4HNO3  3AgNO3 + NO + 2H2
D.
Ag + 4HNO3  AgNO3 + 3NO2 + 2H2O
36. What is the percentage by mass of silver
Which of the following solutions gives
the brightest bulb light in the set-up
in the coin ?
(Relative atomic masses : Cl=35.5, Ag=108)
shown above ?
A.
45%
A.
1 M HNO3
B.
60%
B.
1 M HCl
C.
75%
C.
1 M H2SO4
D.
90%
D.
1 M CH3COOH
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MTAu / Form 4 / 2nd term Exam 99-00 / Chemistry / Paper II /
40. The following diagrams show the steps
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43. A 2.0 M sodium chloride solution is
in the preparation of the acid solution.
prepared by dissolving 11.7 g of sodium
chloride in distilled water. What is the
volume of the solution formed ?
(Relative atomic masses: Na= 23.0, Cl= 35.5)
A.
50.0 cm3
B.
100.0 cm3
C.
250.0 cm3
D.
500.0 cm3
44. The formula of a metal carbonate is
The correct sequence of the diagrams is
X2CO3. 100 cm3 of a solution containing
A.
I, IV, III, II
0.69 g of the carbonate requires 50 cm3
B.
III, I, IV, II
of 0.20 M hydrochloric acid for
C.
III, IV, I, II
complete reaction. What is the relative
D.
IV, III, II, I
atomic mass of metal X ?
(Relative atomic masses : C = 12.0, O = 16.0)
41. The
concentration
of
an
aqueous
A.
19.0
solution of an acid is 1.0 M. 25.0 cm3 of
B.
23.0
this acid solution requires 37.5 cm of
C.
39.0
2.0 M sodium hydroxide solution for
D.
78.0
3
complete neutralization. What is the
45. The formula for Azone is A4. If one
basicity of the acid ?
A.
1
mole of Azone contains x atoms, how
B.
2
many atoms will one mole of Axygen
C.
3
gas (A3) contain ?
D.
4
A.
4x
B.
3x
C.
4
3
x
D.
3
4
x
42. Iron can be produced from iron(III)
oxide by the following reaction :
Fe2O3(s) + 3CO(g) 
2Fe(s) + 3CO2(g)
What mass of iron(III) oxide is required
to produce 2.1 g of iron ?
(Relative atomic masses: O= 16.0, Fe = 56.0)
A.
3.0 g
B.
4.5 g
C.
6.0 g
D.
9.0 g
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MTAu / Form 4 / 2nd term Exam 99-00 / Chemistry / Paper II /
Directions :
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Each question below (Question No.s 46 to 50) consists of two separate
statements. Decide whether each of the two statements is true or false; if both are true,
then decide whether or not the second statement is a correct explanation of the first
statement. Then select one option from A to D according to the following table :
A. Both statements are true and the 2nd statement is a correct explanation of the 1st
statement.
B. Both statements are true and but the 2nd statement is NOT a correct explanation of
the 1st statement.
C. The 1st statement is false but the 2nd statement is true.
D. Both statements are false.
1st statement
2nd statement
46. Both dry ice and quartz exist in
the form of discrete molecules.
Carbon and silicon atoms have the
same number of electrons in their
outermost shells.
47. Metals have
conductivity.
thermal
Metals are composed of giant lattices
of positive ions surrounded by
valence electrons which are free to
move throughout the lattices.
48. A solution of hydrogen chloride
in methylbenzene (a non-polar
solvent) can turn blue litmus
paper red.
Hydrogen chloride dissolves in
methylbenzene to form hydrogen
ions.
49. If a student accidentally spills
some hydrochloric acid on his
hand, he should immediately
wash his hand with sodium
hydroxide solution.
Sodium hydroxide solution
neutralize hydrochloric acid.
50. Before transferring 25.0 cm3 of a
solution from a pipette into a
conical flask, the flask should be
washed with the solution first.
Water in the conical flask will dilute
the solution from the pipette.
good
END OF PAPER
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