SERANGOON JUNIOR COLLEGE General Certificate of Education Advanced Level Higher 2 CHEMISTRY 9647/01 JC1 Promotional Examination 6 th October 2009 Paper 1(MCQ) 1 hour Additional Materials: Data Booklet Multiple Choice Answer READ THESE INSTRUCTIONS FIRST On the separate multiple choice answer sheet given, Write your name, subject title, class in the spaces provided. Shade correctly the item index number, starting with the number “1” and the last 4 numbers of your FIN/NRIC number. Eg. If your NRIC is S8906660Z, shade 16660 for the item index number. There are thirty questions in this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate answer sheet. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. You are advised to fill in the OMR Answer Sheet as you go along; no additional time will be given for the transfer of answers once the examination has ended. Any rough working should be done in this question paper. This document consist of 15 printed pages and 1 blank page
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SERANGOON JUNIOR COLLEGE General Certificate of Education Advanced Level Higher 2
CHEMISTRY 9647/01
JC1 Promotional Examination 6th October 2009
Paper 1(MCQ) 1 hour Additional Materials: Data Booklet
Multiple Choice Answer
READ THESE INSTRUCTIONS FIRST
On the separate multiple choice answer sheet given,
Write your name, subject title, class in the spaces provided.
Shade correctly the item index number, starting with the number “1” and the last 4 numbers of
your FIN/NRIC number.
Eg. If your NRIC is S8906660Z, shade 16660 for the item index number.
There are thirty questions in this paper. Answer all questions.
For each question there are four possible answers A, B, C and D.
Choose the one you consider correct and record your choice in soft pencil on the separate
answer sheet.
Each correct answer will score one mark.
A mark will not be deducted for a wrong answer.
You are advised to fill in the OMR Answer Sheet as you go along; no additional time will be
given for the transfer of answers once the examination has ended.
Any rough working should be done in this question paper.
This document consist of 15 printed pages and 1 blank page
2
SRJC 2009 JC1/H2/Promo/2009 [Turn Over
Section A
For each question there are four possible answers, A, B, C and D. Choose the one you
consider to be correct.
1 Which of the following describes the correct dilution procedure to obtain 250 cm3 of
0.004 mol dm-3 hydrochloric acid from a stock solution of concentration of 0.1 mol dm-3?
A Pipette 25.0 cm3 of the stock solution into a 250 cm3 volumetric flask and top up
to the mark with distilled water
B Pipette 20.0 cm3 of the stock solution into a 250 cm3 volumetric flask and top up
to the mark with distilled water
C Pipette 10.0 cm3 of the stock solution into a 250 cm3 volumetric flask and top up
to the mark with distilled water
D Pipette 5.0 cm3 of the stock solution into a 250 cm3 volumetric flask and top up to
the mark with distilled water
2 1.97 g of an unknown MCO3 completely reacts with 50.00 cm3 of
0.4 mol dm-3 of hydrochloric acid. What is the molar mass of MCO3?
A 98.5 g mol-1
B 197.0 g mol-1
C 394.0 g mol-1
D 788.0 g mol-1
3 Which of the following is a type of redox reaction?
A NaOH + HCl → NaCl + H2O
B CaCO3 → CaO + CO2
C HCl + AgNO3 → AgCl + HNO3
D 3Br2 + 6OH- → 5Br
- + BrO3
- + 3H2O
3
SRJC 2009 JC1/H2/Promo/2009 [Turn Over
4 Consider the following half equations:
Cr2O72- + 14H+ + 6e- → 2Cr3+ + 7H2O
Fe2+ → Fe3+ + e-
C2O42- → 2CO2 + 2e
What volume of 0.01 mol dm-3 K2Cr2O7 is required to oxidise 15 cm3 of an acidified
solution of 0.01 mol dm-3 FeC2O4?
A 5.0 cm3
B 7.5 cm3
C 16.7 cm3
D 30.0 cm3
5 When a stream of protons was accelerated across an electrical field, the trajectory of the
protons was as follows.
What would be the angle of deflection when a stream of helium plasma ( +242He ) is sent
through the same electrical field?
A 0.5 o
B 1.0 o
C 2.0 o
D 4.0 o
—
+
p
Angle of deflection = 2.0 o
4
SRJC 2009 JC1/H2/Promo/2009 [Turn Over
6 What is the electronic configuration of element Ni after it has undergone the 3rd ionisation?
A 1s22s22p63s23p63d7
B 1s22s22p63s23p63d8
C 1s22s22p63s23p63d54s2
D 1s22s22p63s23p63d64s1
7 Alliin is the compound responsible for the characteristic smell of garlic.
What are the values of the bond angles a, b and c in the molecule of alliin?
C C
HH
H
CH2 S
O
CH2 C
NH2
H
COOH
a b c
A 180o 120o 90o
B 120o 107o 109o
C 180o 107o 90o
D 120o 109o 107o
8 Which of the following would give the best indication of the relative strengths of the
intermolecular forces of attraction in liquid hydrogen halides?
A Enthalpy change of solution
B Enthalpy change of formation
C Enthalpy change of vaporisation
D Bond dissociation energies
a
b c
5
SRJC 2009 JC1/H2/Promo/2009 [Turn Over
9 Which molecule will not form a hydrogen bond with another of its own molecule?
A CH3F
B CH3NH2
C CH3OH
D NH3
10 Two colourless substances, D and E, react to give a coloured substance F. The time
taken when various initial concentrations of D and E used are recorded below:
[D]/mol dm-3 [E]/mol dm-3 Time/s
0.05 0.05 44
0.05 0.10 22
0.10 0.05 44
What is the rate equation for this reaction?
A rate = k [E]
B rate = k [D] [E]
C rate = k [E]2
D rate = k [D] [E]2
11 If the rate of decay of a radioactive isotope decreases from 400 counts per minute to 25
counts per minute after 16 hours, what is its half life?
A 1 hour
B 4 hours
C 8 hours
D 16 hours
6
SRJC 2009 JC1/H2/Promo/2009 [Turn Over
12 A 14.5 mg of an unknown sample of boron hydride, BxHy was found to occupy a volume
of 188 cm3 at a pressure of 3.59 kPa and 25°C. Which of the following is the molecular
formula of the boron hydride?
A B2H6
B B4H10
C B5H9
D B6H10
13 The value of RT
pVis plotted against p for three gases, L, M and N where p is the pressure,
V is the volume and T is the temperature of the gas.
Which of the following could be the possible identities of the gases?
Gas L Gas M Gas N
A SO2 NH3 H2
B H2 NH3 SO2
C NH3 SO2 H2
D NH3 H2 SO2
p
pV
RT
gas M
gas L
1.0
gas N
7
SRJC 2009 JC1/H2/Promo/2009 [Turn Over
14 The enthalpy change of reaction between magnesium and water can be measured in the
laboratory.
Mg (s) + 2H2O (l) � Mg(OH)2 (s) + H2 (g)
Which information, other than that obtained in this experiment, is needed to calculate a
value for the enthalpy change of formation of Mg(OH)2 (s) ?
A Enthalpy change of atomisation of magnesium
B Enthalpy change of combustion of hydrogen
C First and second ionisation energies of magnesium