Ms Junk Essay

Submitted By JunkyJackass
Words: 4380
Pages: 18

2011

H I G H E R S C H O O L C E R T I F I C AT E

E X A M I N AT I O N

Chemistry

General Instructions
• Reading time – 5 minutes
• Working time – 3 hours
• Write using black or blue pen
Black pen is preferred
• Draw diagrams using pencil
• Board-approved calculators may be used
• A data sheet and a Periodic Table are provided at the back of this paper • Write your Centre Number and
Student Number at the top of pages 9, 11, 13, 15, 17, 19 and 21

2000

Total marks – 100
Section I

Pages 2–22

75 marks
This section has two parts, Part A and Part B
Part A – 20 marks
• Attempt Questions 1–20
• Allow about 35 minutes for this part
Part B – 55 marks
• Attempt Questions 21–32
• Allow about 1 hour and 40 minutes for this part
Section II

Pages 23–33

25 marks
• Attempt ONE question from Questions 33–37
• Allow about 45 minutes for this section

Section I
75 marks
Part A – 20 marks
Attempt Questions 1–20
Allow about 35 minutes for this part
Use the multiple-choice answer sheet for Questions 1–20.

1

Which of the following industrial processes is used to produce ethanol from ethylene?
(A) Hydration
(B)

Dehydration

(C)

Addition polymerisation

(D) Condensation polymerisation

2

Which of the following shows two products that result from the fermentation of glucose?
(A) Cellulose and water
(B)

Ethanol and oxygen

(C)

Carbon dioxide and water

(D) Ethanol and carbon dioxide

3

Which of the following lists contains ONLY basic substances?
(A) Oven cleaner, urine, vinegar
(B)

Lemonade, drain cleaner, blood

(C)

Baking soda, ammonia, sea water

(D) Antacid, dishwashing detergent, lemon juice

4

Which of the following gases can cause major depletion of the ozone layer?
(A) O2
(B)

NO2

(C)

CO2

(D) CCl3F

– 2 –

5

Iron (III) chloride and aluminium sulphate are two chemicals that can be used in the purification of town water supplies. What is the role of these chemicals?
(A) To disinfect water by removing bacteria
(B) To remove particulate material by flocculation
(C) To control the concentration of total dissolved solids
(D) To control the pH of the water within the required range

6

Which property would be most useful in distinguishing between butan-1-ol and propan-1-ol? (A) Boiling point
(B) Colour
(C) Conductivity
(D) Density

7

Which of the following lists contains ONLY unstable isotopes?
(A)

99
Tc,
43

12
N
7

(B)

214
Pb,
82

46
Ca,
20

99
Tc
43

(C
C)

238
U,
92

40
Ca,
20

12
N
7

(D)

8

207
Pb,
82

238
U,
92

40
Ca,
20

99
Tc
43

What is the systematic name of the molecule shown?
O
H3C

CH2

C
O

CH2

(A) Butyl butanoate
(B) Propyl butanoate
(C) Butyl propanoate
(D) Propyl propanoate

– 3 –

CH2

CH2

CH3

9

What property of O3 makes it more soluble in water than O2 in water?
(A) O3 is a polar molecule.
(B)

O3 has a resonance structure.

(C)

O3 is a highly reactive molecule.

(D) O3 has a coordinate covalent bond.
10

An aqueous sample containing the following anions is analysed.
Cl −

CO32−

SO42−

In which order should the reagents be added to determine the amount of chloride in the sample? Reagent 1

Reagent 2

Reagent 3

(A)

H2SO4

BaSO4

(B)

HCl

Pb(NO3)2

AgNO3

(C)

HNO3

Ba(NO3)2

AgNO3

(D)

11

AgNO3

Ba(NO3)2

AgNO3

CH3COOH

Which compound can form when bromine water reacts with propene?
(A) 1-bromopropane
(B)

2-bromopropane

(C)

1,1-dibromopropane

(D) 1,2-dibromopropane

– 4 –

12

A table of redox couples and their standard reduction potentials is shown.
Redox couple

Ε−
°

Ag+/Ag
Cd2+/Cd
Pd2+/Pd
Ni2+/Ni

0.80 V
−0.40 V
0.92 V
−0.24 V

Which of the following ranks the metals in decreasing order of their electrochemical activity? (A) Ni > Cd > Ag > Pd…