2001 p2
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SB (SLC/SLC) QK11417/2© UCLES 2001 [Turn over
UNIVERSITY OF CAMBRIDGE LOCAL EXAMINATIONS SYNDICATE
General Certificate of Education Ordinary Level
COMBINED SCIENCE 5129/2PAPER 2
OCTOBER/NOVEMBER SESSION 2001 2 hours 15 minutes
Candidates answer on the question paper.No additional materials are required.
TIME 2 hours 15 minutes
INSTRUCTIONS TO CANDIDATES
Write your name, Centre number and candidate number in the spaces at the top of this page.
Answer all questions.
Write your answers in the spaces provided on the question paper.
INFORMATION FOR CANDIDATES
The number of marks is given in brackets [ ] at the end of each question or part question.
A copy of the Periodic Table is printed on page 16.
CandidateCentre Number Number
Candidate Name
FOR EXAMINER’S USE
TOTAL
http://www.xtremepapers.net
2
5129/2/O/N/01
1 (a) Complete the table in Fig. 1.1.
Fig. 1.1[4]
(b) (i) What is the formula of the compound formed between magnesium and chlorine?
...............................................................................................................................[1]
(ii) What type of bonding occurs in this compound? ..................................................[1]
2 The following is a list of gases.
acetylene carbon dioxide carbon monoxideethene nitrogen oxygen sulphur dioxide
Use the list to complete the following sentences.
(a) The gas that undergoes polymerisation is ........................................................ . [1]
(b) The gases that are used in welding are ........................................................
and ........................................................ . [2]
(c) The gas that is a pollutant in the air and damages buildings is
........................................................ . [1]
(d) The gas that is produced by incomplete combustion of petrol is
........................................................ . [1]
ForExaminer’s
Use
nucleon protonprotons neutrons electrons
number number
chlorine atom 35 17
magnesium atom 24 12
sodium ion 23 12
3
5129/2/O/N/01 [Turn over
3 Ammonia is manufactured according to the following equation.
N2 + 3H2 → 2NH3
(a) (i) Calculate the relative molecular mass, Mr, of nitrogen and of ammonia.
[Ar: H, 1; N, 14]
Mr of nitrogen ............................................................................................................
Mr of ammonia ......................................................................................................[2]
(ii) Calculate the mass of nitrogen required to manufacture 8.5 kg of ammonia.Show your working.
...................................................................................................................................
...................................................................................................................................
...............................................................................................................................[3]
(b) Ammonia is used to manufacture ammonium sulphate.
Explain why ammonium sulphate is used as a fertiliser.
..........................................................................................................................................
......................................................................................................................................[1]
4 Carbon is an element. Methane is a compound.
(a) Explain the difference between an element and a compound using carbon and methaneas examples.
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
......................................................................................................................................[3]
(b) Name the homologous series to which methane belongs.
......................................................................................................................................[1]
(c) Draw the structure of methane.
[1]
ForExaminer’s
Use
4
5129/2/O/N/01
5 Study the following reaction scheme.
(a) Identify substances A, B, C and D.
metal A .......................................................
gas B .......................................................
salt C .......................................................
gas D ....................................................... [4]
(b) (i) What type of reaction occurs between sodium hydroxide and hydrochloric acid?
...............................................................................................................................[1]
(ii) Construct an equation for this reaction.
...............................................................................................................................[1]
ForExaminer’s
Use
metal A
sodium hydroxide + gas B
salt C + water sodium chloride + gas D + water
water
warm with ammonium chloridehydrochloric acid
5
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6 Fig. 6.1 describes some properties of five substances.
Fig. 6.1
(a) (i) Give the letter of one metal in the table. ...............................................................[1]
(ii) Give two reasons for your choice.
...................................................................................................................................
...................................................................................................................................
...............................................................................................................................[2]
(b) (i) Give the letter of one covalent compound in the table.
...............................................................................................................................[1]
(ii) Give two reasons for your choice.
...................................................................................................................................
...................................................................................................................................
...............................................................................................................................[2]
ForExaminer’s
Use
conducts conducts meltingsoluble in
substance electricity electricity pointwater
when solid when melted / °C
A no no –114 yes
B yes yes 961 no
C no yes 714 yes
D no no 114 no
E yes yes 1917 no
6
5129/2/O/N/01
7 Fig. 7.1 shows a lighting circuit.
Fig. 7.1
(a) Which switches must be closed to light lamp Q only? .................................................[1]
(b) Draw a fuse in the correct position in the circuit to protect all the wiring. [2]
(c) Explain how a fuse makes the circuit safer.
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
......................................................................................................................................[3]
(d) Each lamp in the circuit has a resistance of 920 Ω. The potential difference across thecircuit is 230 V.
Calculate the current through switch A when all the switches are closed.
.................................................[3]
(e) What energy changes take place inside the lamp?
......................................................................................................................................[2]
live
neutral
switch B
switch A
lamp P
switch C
lamp Q
230volts
ForExaminer’s
Use
7
5129/2/O/N/01 [Turn over
8 Fig. 8.1 shows the electromagnetic spectrum.
Fig. 8.1
(a) Which part of the spectrum has the lowest frequency? ...............................................[1]
(b) Name part S. ................................................................................................................[1]
(c) State two properties of all types of radiation in the spectrum.
1. ......................................................................................................................................
2. ..................................................................................................................................[2]
(d) Yellow light from the Sun has a wavelength of 5.0 x 10–7 m and travels at a speed of 3 x 108 m / s. The light takes 500 s to reach the Earth.
Calculate
(i) the distance between the Earth and the Sun;
.................................................[2]
(ii) the frequency of the yellow light.
.................................................[2]
ForExaminer’s
Use
radio microwaves infra-red visible light ultraviolet S gamma-rays
8
5129/2/O/N/01
9 Radium, Ra, emits alpha-particles and decays to radon, Rn.
22688Ra → X
YRn + 42He
(a) Deduce
(i) the value X, ...........................................................................................................[1]
(ii) the value Y, ...........................................................................................................[1]
(iii) the number of neutrons in the radium nucleus. ....................................................[1]
(b) Radium has a half-life of 1600 years. 4800 years ago, a sample of radium emittedalpha-particles at a rate of 24 000 per second.
At what rate does this sample emit alpha-particles now?
[3]
(c) In paper mills, the thickness of the paper is controlled by measuring how many beta-particles pass through the paper each second.
(i) Name a suitable detector for beta-particles. .........................................................[1]
(ii) Explain why alpha-particles are not used.
...............................................................................................................................[1]
ForExaminer’s
Use
9
5129/2/O/N/01 [Turn over
10 (a) A magnet is placed near two pieces of iron, as shown in Fig. 10.1.
iron magnet iron
Fig. 10.1
The pieces of iron become magnetised.
On the diagram, mark the north and south poles of both pieces of iron. [2]
(b) Electromagnets are often used instead of permanent magnets.
State one advantage of an electromagnet that a permanent magnet does not have.
..........................................................................................................................................
......................................................................................................................................[1]
(c) Why is the core of an electromagnet made of iron rather than steel?
..........................................................................................................................................
......................................................................................................................................[1]
(d) State two ways in which the strength of an electromagnet can be increased.
1. ......................................................................................................................................
2. ..................................................................................................................................[2]
N S
ForExaminer’s
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10
5129/2/O/N/01
11 In a fermentation experiment, water is boiled for 30 minutes, cooled and mixed with yeastand glucose. The mixture is left as shown in Fig. 11.1, for two hours.
Fig. 11.1
(a) (i) Which type of respiration takes place?
...............................................................................................................................[1]
(ii) What change is seen in tube B?
...............................................................................................................................[1]
(iii) Write a word equation for this respiration reaction.
...............................................................................................................................[1]
(iv) What is the advantage, to the yeast, of this reaction?
...............................................................................................................................[1]
(b) The type of respiration you have named in (a)(i) can take place in human muscle.
(i) Name the product formed.
...............................................................................................................................[1]
(ii) What type of activity can cause this product to form?
...............................................................................................................................[1]
tubeA
tubeB
mixtureof yeastandglucosein boiledwater
limewater
ForExaminer’s
Use
11
5129/2/O/N/01 [Turn over
12 Fig. 12.1 shows an ecosystem diagram.
(a) Draw no more than five arrows to show the direction of the flow of energy in theecosystem.
[4]
Fig. 12.1
(b) There are no decomposers shown in this ecosystem.
(i) Name a group of organisms that are decomposers.
...............................................................................................................................[1]
(ii) Explain the function of decomposers in an ecosystem.
...................................................................................................................................
...................................................................................................................................
...............................................................................................................................[2]
(c) Explain why green plants are called producers, but animals are called consumers.
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
......................................................................................................................................[3]
ForExaminer’s
Use
snail songbird
grass Sun
rabbit hawk
12
5129/2/O/N/01
13 (a) (i) Define excretion.
...................................................................................................................................
...................................................................................................................................
...............................................................................................................................[2]
(ii) Name two substances which are excreted by a human.
1. ...............................................................................................................................
2. ...........................................................................................................................[2]
(iii) For each substance named in (ii), state where it is produced and name the organwhich excretes it.
1 where produced .................................................................................................
excreted by ........................................................................................................
2 where produced .................................................................................................
excreted by ....................................................................................................[4]
(b) (i) What is meant by egestion (defaecation)?
...................................................................................................................................
...............................................................................................................................[1]
(ii) Suggest reasons why egestion should not be considered an example of excretion.
...................................................................................................................................
...............................................................................................................................[1]
ForExaminer’s
Use
13
5129/2/O/N/01
14 (a) Define osmosis.
..........................................................................................................................................
..........................................................................................................................................
......................................................................................................................................[2]
(b) Fig. 14.1 shows a plant cell into which water passes by osmosis.
Fig. 14.1
(i) What is the name for this type of cell?
...............................................................................................................................[1]
(ii) Which is the more concentrated solution, the plant cell sap or the water in the soil?
...............................................................................................................................[1]
(c) Plant roots absorb ions from the soil.
Name one ion which is absorbed by plants.
......................................................................................................................................[1]
(d) Water absorbed by the roots passes upwards through the plant to the leaves.
(i) Through which structures is the water lost from the leaves to the air?
...............................................................................................................................[1]
(ii) Name this process.
...............................................................................................................................[1]
ForExaminer’s
Use
16
5129/2/O/N/01
Gro
up
DA
TA S
HE
ET
Th
e P
erio
dic
Tab
le o
f th
e E
lem
ents
140
Ce
Cer
ium
58
141
Pr
Pra
seod
ymiu
m
59
144
Nd
Neo
dym
ium
60
Pm
Pro
met
hium
61
150
Sm
Sa
ma
riu
m
62
152
Eu
Eur
opiu
m
63
157
Gd
Gad
olin
ium
64
159
Tb
Terb
ium
65
162
Dy
Dys
pros
ium
66
165
Ho
Hol
miu
m
67
167
Er
Erb
ium
68
169
Tm
Thu
lium
69
173
Yb
Ytte
rbiu
m
70
175
Lu
Lute
tium
71
232
Th
Tho
rium
90
Pa
Pro
tact
iniu
m
91
238 U
Ura
nium
92
Np
Nep
tuni
um
93
Pu
Plu
toni
um
94
Am
Am
eric
ium
95
Cm
Cur
ium
96
Bk
Ber
keliu
m
97
Cf
Cal
iforn
ium
98
Es
Ein
stei
nium
99
Fm
Fer
miu
m
100
Md
Men
dele
vium
101
No
Nob
eliu
m
102
Lr
Law
renc
ium
103
1 HH
ydro
gen
1
7 Li
Lith
ium
3
23 Na
Sod
ium
11
24 Mg
Mag
nesi
um
12
40 Ca
Cal
cium
20
45 Sc
Sca
ndiu
m
21
48 Ti
Tita
nium
22
51 VV
anad
ium
23
52 Cr
Chr
omiu
m
24
55 Mn
Man
gane
se
25
56 Fe
Iron
26
59 Co
Cob
alt
27
59 Ni
Nic
kel
28
64 Cu
Cop
per
29
65 Zn
Zin
c
30
70 Ga
Gal
lium
31
27 Al
Alu
min
ium
13
11 BB
oron
5
12 CC
arbo
n
6
14 NN
itrog
en
7
16 OO
xyge
n
8
19 FF
luor
ine
9
28 Si
Sili
con
14
31 PP
hosp
horu
s
15
32 SS
ulph
ur16
35.5
Cl
Chl
orin
e17
40 Ar
Arg
on18
20 Ne
Neo
n10
4 He
Hel
ium
2
73 Ge
Ger
man
ium
32
75 As
Ars
enic
33
79 Se
Sel
eniu
m
34
80 Br
Bro
min
e
35
84 Kr
Kry
pton
36
39 KP
otas
sium
19
88 Sr
Str
ontiu
m
38
89 YY
ttriu
m
39
91 Zr
Zirc
oniu
m
40
93 Nb
Nio
bium
41
96 Mo
Mol
ybde
num
42
Tc
Tech
netiu
m
43
101
Ru
Rut
heni
um
44
103
Rh
Rho
dium
45
106
Pd
Pal
ladi
um
46
108
Ag
Silv
er
47
112
Cd
Cad
miu
m
48
115
In Indi
um
49
119
Sn
Tin
50
122
Sb
Ant
imon
y
51
128
TeTe
lluriu
m
52
127 I
Iodi
ne
53
131
Xe
Xen
on
54
137
Ba
Bar
ium
56
139
La
Lant
hanu
m
57*
178
Hf
Haf
nium
72
181
TaTa
ntal
um
73
184
WTu
ngst
en
74
186
Re
Rhe
nium
75
190
Os
Osm
ium
76
192 Ir
Irid
ium
77
195
Pt
Pla
tinum
78
197
Au
Gol
d
79
201
Hg
Mer
cury
80
204
Tl
Tha
llium
81
207
Pb
Lead
82
209
Bi
Bis
mut
h
83
Po
Pol
oniu
m
84
At
Ast
atin
e
85
Rn
Rad
on
86
Fr
Fran
cium
87
227
Ac
Act
iniu
m
89†
9 Be
Ber
ylliu
m
4
III
IIIIV
VV
IV
II0
85 Rb
Rub
idiu
m
37
133
Cs
Cae
sium
55
226
Ra
Rad
ium
88
The
vol
ume
of o
ne m
ole
of a
ny g
as is
24
dm3
at r
oom
tem
pera
ture
and
pre
ssur
e (r
.t.p.
).
a Xb
a =
rel
ativ
e at
omic
mas
s
X=
ato
mic
sym
bol
b =
pro
ton
(ato
mic
) nu
mbe
r
Key
* 58-
71 L
anth
anoi
d se
ries
†90-
103
Act
inoi
d se
ries