O_ Level Prelim Practice
Transcript of O_ Level Prelim Practice
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Candidate Name: Class: Index No:
DUNMAN SECONDARY SCHOOL
Wherediscernment, discipline, daring, determination
& duty become a part of life.
___________________________________________
MID YEAR EXAMINATION 2009
SEC 4 NORMAL (ACADEMIC)
ADDITIONAL MATHEMATICS 4039
1 H 45min 14 MAY 2009
Instructions to Candidates:Write your name, index number and class in the spaces provided on the separate answer paper.
Answer allthe questions from Question 1 to Question 12.
Write your answers and working on the separate answer paper provided.
Hand in Question 1 to Question 10together.
If working is needed for any question, show it on the same page as the rest of the answer.Omission of essential working will result in loss of marks.
YOU ARE EXPECTED TO USE AN ELECTRONIC CALCULATOR.
Give non-exact numerical answers correct to 3 significant figures, or 1 decimal place in the case of
angles in degrees, unless a different level of accuracy is specified in the question.
INFORMATION FOR CANDIDATES
The number of marks is given in brackets [ ] at the end of each question or part question.
The total number of marks for this paper is 70.
For , use either your calculator value or 3142, unless the question requires the answer in terms of .
This question paper consists of 5 printed pages including the cover page
Setter: Mrs Lim LL [Turn over
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Mathematical Formulae
1. ALGEBRA
Quadratic Equation
For the equation ax2+ bx+ c= 0,
x=
24
2
b b ac
a
.
Binomial Expansion
(a+ b)n= a
n+
1
na
n1b+
2
na
n2b
2+ +
r
na
nrb
r+ + b
n,
where nis a positive integer and
r
n
=
!
!( )!
n
r n r = 1 1
!
n n n r
r
.
2. TRIGONOMETRY
Identitiessin2A+ cos2A= 1 .
sec2A= 1 + tan2A .
cosec2A= 1 + cot2A.
sin sin cos cos sinA B A B A B .
cos cos cos sin sinA B A B A B .
tan tan
tan1 tan tan
A BA B
A B
.
sin2 2sin cosA A A .2 2 2 2cos 2 cos sin 2cos 1 1 2sinA A A A A .
2
2tantan2
1 tan
AA
A
.
.
Formulae for ABC
sin sin sin
a b c
A B C .
a2= b
2+ c
22bccosA .
=2
1bcsinA.
1 Differentiate the following with respect tox:
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(i) 2 1
3x xx
[2]
(iii)2
2
3 1
x
x [3]
2 Given that M =5 11
3 6
, find M1 and hence solve the simultaneous equations
5 11 28 0
3 6 13 0
x y
x y
[5]
3 (i) Expand
8
22
x
in ascending powers ofxup to and including the term in x3.
[3]
(ii) Hence determine the coefficient of x3in the expansion of 8
1 3 22
xx
.
[3]
4 (i) Given that 33 3 2y x x , finddy
dx. [3]
(ii) Hence evaluate3
1
30
3 5
3 2
xdx
x
. [3]
5 When the height of liquid in a cylinder isxmetres, the volume of the liquid is3
mV ,
where 31
[(3 2) 9]20
V x .
(i) Find an expression fordV
dx. [2]
(ii) The liquid enters the cylinder at a constant rate of13sm081.0 . Find the rate
which the height of the liquid is increasing when30.9 mV . [4]
6 (i) Find 2 1x dx [2]
(ii) Given that 3
0
5f x dx , evaluate
(a) 3
0
2f x dx [1]
(b) 3
0+1f x dx [3]
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7 A curve for which2
1dypx
dx x , wherepis a constant, passes through the point
(1,3). At this point, the gradient of the curve is 9.
(i) Calculate the the value ofpand hence determine the equation of the curve. [5]
(ii) Calculate the coordinates of the stationary point and determine its nature.
[4]
8 The diagram shows two points )6,7(and)6,3( BA on a circle with centre G.
The equation of the tangent to the circle at the point )12,1( Q isx+ 5y+59= 0.
(i) Show that the coordinates ofGis )7,2( . [6]
(ii) Find the equation of the circle. [2]
G
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9 A piece of wire of length 18 cm is cut into two pieces, one of lengthxcm, the other of
length (18 )x cm. The piece of lengthxcm is bent to form an equilateral triangle and
the other piece is bent to form a square.
(i) Show thatthe sum of areas of the 2 shapes,Acm2, is given by
2
2 183
36 16
xA x
[3]
(ii) Determine the value ofxfor whichAwill be a minimum and hence find the
minimum area. [6]
10 The equation of a curve isy=2x2 + 4x+ 6.
(i) Calculate the gradient atx= 2. [2]
(ii) Show that the equation of the normal to the curve atx= 2 is
y= 0.25x+ 5.5 [3]
(iii) Find the shaded area bounded by the curve, the normal atx= 2 and thexand
y-axis. [5]
End of Paper
8
6
4
2
-2
5
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Q No Marking Scheme Marking
Point
Remarks
(ii) 331 13 30 0
13
0
3 3 53 5 1
33 2 3 2
13 3 2
3
13 3 2 0 1
3
xxdx dx
x x
x x
M1
M1
A1
5(i) 2 2
1 93 (3 2) 3 (3 2)
20 20
dVx x
dx
M1, A1
(ii)310.9 [(3 2) 9] 0.9
20V x
3 1(3 2) 273
x x
2
9 10.081 3 2
20 3
0.0810.02 m/s
8120
dV dV dx
dt dx dt
dx
dt
dx
dt
M1
A1
M1
A1
6(i)
3 3
2 22 1 2 12 1 3 3
22
x xx dx c c
*Deduct 1 mark for missing c.
M1
A1
(ii)(a)
3
0
2f x dx =10B1
(b) 3 3 3
0 0 0+1 1f x dx f x dx dx
3
05 8x
M1
M1, A1
7(i)
21
1 9 81
dy
p pdx
12 2
2
2
1 18 4 4
1
3 4 1 0
14
xy x dx x y x c
x x
c c
y xx
* Allow follow thru for value ofpcalculated
M1, A1
M1
M1
A1
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Q No Marking Scheme Marking
Point
Remarks
(ii)2
2
3
18 0 8
10.5
8
dyx x x
dx x
x x
2
2 3
28
d y
dx x
Whenx= 0.5,
2
32
28 24 0
0.5
d y
dx
; Min point
(Allow first derivative test)
2 14 0.5 3
0.5y
(0.5, 3) is a minimum point
* Allow follow thru for value ofpcalculated. Only method
marks
M1
A1
M1
A1
8(i)Equation of tangent :
1 59
5 5y x
Equation of GQ : m= 5
125 5 17
1
yy x
x
-------- (1)
AG = BG 2 2 2 2
3 6 7 6x y x y
2 2
2 2
3 7
6 9 14 49
20 40 2
x x
x x x x
x x
Substitute back into (1), y= 7
G (2, 7)
M1
M1
M1
M1
A1
A1
(ii)
2 23 2 6 7 26r
2 2
2 7 26x y
M1
A1
9(i) Length of square = 184
x cm
Length of triangle =3
xcm
Area of triangle =
2
21 3sin 602 3 36
xx
Area of square =
221818
4 16
xx
M1, M1
M1
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Q No Marking Scheme Marking
Point
Remarks
2
2 183
36 16
xA x
(ii)
2 18 13 236 16
183
18 8
xdA xdx
xx
3 180 0
18 8 8
3 1 910.171
18 8 4
dA xx
dx
x x
2
23 1 0
18 8d Adx
Minimum
2
2 18 10.171310.171 8.81
36 16A
cm2
M1
M1
A1
M1
M1, A1
10(i)4 4
dyx
dx
Atx= 2, 4dy
dx
M1
A1
(ii) Atx= 2, y= 6Gradient of normal = 0.25
6 10.25 5.5
2 4
yy x
x
M1
M1
M1
(iii) y=2x2 + 4x+ 6 = 0
2 (x+ 1) (x3)=0
x= 1 or 3
Area = 3
2
2
12 4 6 5.5 6 2
2x x dx
3
3 2
2
2 2 6 11.53
2 518 14 11.5 14
3 6
x x x
M1
M1, M1
M1
A1
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SUBJECT : Science LEVEL : Four Express / Five Normal
(Academic)
PAPER : 1 DURATION : 1 hour
DATE : 20 September 2006
CLASS : NAME : NO :
INSTRUCTIONS TO CANDIDATES:
There are 40questions on this paper. For each question there are fourpossible
answers, A, B, C and D. you are to choose the most appropriate one and indicate
it on the separate answer sheet.
Read the instructions on the separate answer sheet very carefully.
Attempt allthe questions. Marks will not be deducted for wrong answers.
Your total score on this test will be the number of correct answers given.
Assume g = 10 m s-2 or 10 N kg-1.
Speed of light in vacuum, c = 30 x 108 m s-1.
A periodic table is provided on the last page.
BEATTY SECONDARY SCHOOL
PRELIMINARY EXAMINATION 2006
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21. According to the kinetic theory of gases, which assumption is correct?
A Gas particles strongly attract each another.
B Gas particles travel in curved paths.
C The volume of gas particles prevents random motion.
D Energy may be transferred between colliding particles.
22. The compound cyclobutane has a melting point of -50oC and a boiling point of 13oC. At
which temperature is cyclobutane a liquid?
23. Which of the following pairs of chemicals is the most suitable for preparing lead
sulphate?
A lead nitrate and sodium sulphate
B lead oxide and sulphuric acid
C lead carbonate and sulphuric acid
D lead chloride and sodium sulphate
24. The manufacture of nitric acid can be represented as follows:
N2 NH3NO NO2 HNO3
Which one of the following correctly shows the oxidation state of nitrogen at each stage
of the process?
N2 NH3 NO NO2 HNO3
A 0 -3 +2 +4 +5
B
0
+3
+2
+4
+5
C
-3
+3
+2
+4
+5
D -3 -3 +2 +4 +5
25. Which diagram best shows the structure of an alloy?
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26. Two particles XandYhave the following composition:
electrons neutrons protons
X 4 6 5
Y 6 4 5
It follows that X and Y.
1 are both positively charged.
2 have the same mass number.
3 are particles of the same element.
A Only 1 is true.
B Only 3 is true.
C 1 and 2 are both true.
D 2 and 3 are both true.
27. To a solution of zinc nitrate, concentrated ammonia solution is added drop wise. Which
of the following is the correct sequence of observations as the reaction proceeds?
A A cloudy white suspension forms at first, but eventually the solution becomes clear.
B The solution turns deep blue at first, then a pale blue precipitate forms.
C The solution remains clear for the entire procedure.
D A white precipitate forms in the solution, but the solution eventually turns a deep
blue colour.
28. The catalyst manganese (IV) oxide was added to 10cm3of aqueous hydrogen peroxidein four separate experiments. The results are listed below. In which experiment was
the manganese (IV) oxide most finely powdered?
ExperimentHydrogen peroxide
concentration(mol/dm
3)
Temperature of thereaction (C)
Volume of oxygenproduced in 10s (cm
3)
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A
B
C
D
0.05
0.05
0.05
0.10
20
20
30
20
10
15
15
15
29. Water is formed when hydrogen is burned in air. Which diagram shows apparatus
correctly set up to collect the water?
30. Three different beakers were set up as shown in the diagram.
What could metals X and Y be?
X
Y
A Aluminium Zinc
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B Zinc Copper
C Lead Copper
D Copper Zinc
31. The scale below shows the colour of an indicator Qin solutions of different pH.
Which pair of solutions below can possibly be distinguished by using indicator Q?
A aqueous solutions of ammonia and sodium chloride
B aqueous solutions of sodium hydroxide and ammoniaC aqueous solutions of sulphuric acid and ethanoic acid
D water and an aqueous solution of sodium chloride
32. The energy diagram shows enthalpy changes that could take place during a chemical
reaction.
Which enthalpy change represents the overall enthalpy change for the reaction?
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33. Ammonia gas decomposes according to the equation:
2NH3(g) N2 (g) + 3H2 (g)
What total volume of gas is produced from the decomposition of 100cm3of ammonia
(all volumes of gases being measured at r.t.p.)?
A 150cm3 C 300cm3
B 200cm3 D 400cm3
34. Different metals 1 to 6 are reacted with hydrochloric acid at 20oC. The thermometers
show the highest temperatures reached for the reactions. Study the diagrams below todetermine the relative reactivity of the metals used.
Which of the following combinations would show a positive reaction?
I Metal 5 and aqueous salt of metal 1
II Metal 6 and aqueous salt of metal 2
III Metal 4 and aqueous salt of metal 3
A I, II and III
B I and II only
C I and III only
D II and III only
35. Reservoir X Y Z tap water
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The production of clean water is outlined in the flow chart above. What are processes
X, Y and Z?
X Y Z
A
chlorination
filtration
sedimentation
B sedimentation filtration chlorination
C filtration chlorination sedimentation
D sedimentation chlorination filtration
36. The corrugated iron sheets which are used as a roofing material are often coated with
tin as shown below.
The tin layers
A prevent corrosion solely by providing a mechanical barrier for the iron.
B inhibit corrosion because they react with the iron to form an alloy.
C act as a sacrificial anode and corrode in preference to iron.
D improve the appearance of the iron and have no effect on the rate of corrosion.
37. Hydrogen gas is required in the production of margarine. The word equation for the
production of margarine is shown below:
Vegetable oils + hydrogen gas margarine
Which of the following options correctly lists the nature of vegetable oils, the type of
reaction occurring and the catalyst used?
Nature of vegetable oil Type of reaction Catalyst used
A unsaturated compound substitution reaction manganese(IV) oxideB saturated compound addition reaction vanadium(V) oxideC saturated compound substitution reaction IronD unsaturated compound addition reaction Nickel
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38. An organic compound Greacts with an acidified solution of potassium dichromate(VI).
Gdoes not react with the bromine water. Gis
A ethane
B ethanol
C ethyl ethanoateD ethanoic acid
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39. The following diagrams can be used to illustrate the phrases (i) to (iv):
(i) a mixture of elements and compounds
(ii) a mixture of elements
(iii) molecules of an element
(iv) molecules of a compound
What is the correct order of the diagrams?
(i) (ii) (iii) (iv)
A d a c bB d c b aC d c a bD d b a c
40. Catalytic addition of steam to hydrocarbon Pforms compound Q. Compound Qcan be
oxidized to give compound R. What could P, Q and Rbe?
P Q R
A C2H4 C2H5OH CH3COOH
B C2H4 C2H6 C2H5OH
C C3H6 C3H8 C2H5COOH
D C3H6 C2H5COOH C2H5OH
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SUBJECT :SCIENCE (CHEMISTRY) LEVEL : SEC
4E/5N
PAPER : 5152/3 DURATION : 1h
15m
DATE : 14thSEP 2006
CLASS : NAME : NO :
INSTRUCTIONS TO CANDIDATES
1. There are two sections in this paper. Sect ion A is com pulsory.All answers to Section A must be written in the spaces provided on the
question paper.
2. Sect ion B con sists of three quest io ns. You are to answer any two. Write
your answ ers on the wr i t ing p aper prov ided.
3. Attach the writing papers behind the question paper.
4. A copy of the Periodic Table is provided on the last page.
SECTION MARKS
A
12
13
14
BEATTY SECONDARY SCHOOL
PRELIMINARY EXAMINATION 2006
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TOTAL 65
This question paper consists of 11 printed pages (including this cover page and the
Periodic Table)
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Section A (45 marks)
Answer ALL questions in the spaces provided on the question paper.
1. A rock from another planet was found to contain three elements. The electronic
arrangements of these elements are shown below.
Element Electronic arrangement
A 2, 8,2
B 2, 8, 8, 2
C 2, 8, 8, 8, 2
a) In which group of the Periodic Table would you put these elements? [1]
b) Which element has the largest atom? [1]
c) Which element would be most reactive? Why? [2]
d) What would be the electronic arrangement of the element above A in the
group? [1]
2. The table below shows the electronic structure of six elements A to F.
Element Electronic Structure
A 2.1
B 2.2
C 2.4
D 2.8.7
E 2.8.8
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F 2.8.8.1
a) What is the formula of the compound formed between
i) A and D
ii) C and D [2]
b) Draw dots and cross diagram of ONE of the compound in (a). You only
need to show the valence electrons. [2]
c) Give two differences in general properties between the two compound
formed in (a). [2]
3. Solid copper (II) oxide was added to 50 cm3 of dilute sulphuric acid until the
solution was no longer acidic. The mixture became warm during the reaction.
a) Name the two products of the reaction. [1]
b) Write down the balanced chemical equation including state symbols for the
reaction. [2]
c) By observation only, how would you know when the solution was no longer
acidic? [1]
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d) By a simple test, how would you show that the solution was no longer
acidic? [1]
e) Why did the mixture become warm? [1]
4. The element oxygen exists in two forms, O2and O3. Both forms are gases.
a) Ozone molecules, O3, decompose when heated into O2 molecules
according to the equation below.
2 O3 3 O2
What volume of oxygen, O2, is formed when 40 cm3 of ozone, O3, is
decomposed, both volumes being measured at the same temperature and
pressure? [2]
b) Ozone is an oxidising agent. What do you understand by the term
oxidising? [1]
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c) Describe the colour change you expect to see when ozone is bubbled into
aqueous potassium iodide. [2]
Colour before:
Colour after:
5. The drug, Ibuprofen, has the structural formula shown below:
a) Name the elements present in Ibuprofen. [1]
b) Write the molecular formula and empirical formula of Ibuprofen. [2]
i) Molecular formula:
ii) Empirical Formula:
c) What is the relative molecular mass of Ibuprofen? [1]
d) If this drug was dissolved in water and the resulting solution tested with pH
paper, what would you expect the pH value of the solution to be and why? [2]
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a) Suggest the identity of [4]
i) the Green Powder X:
ii) the Black Powder A:
iii) the Gas B:
iv) the Blue Solution C:
b) Write the equation for the reaction which produces a white precipitate on the
lime water. [1]
Green Powder X
Black
Powder AGas B
heated
Blue SolutionC
Produce a
white
precipitate
Blue Crystals
White Powder
dissolved in dilutesulphuric acid
passed throughlime water
6.
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7. Petrol vapour is mixed with air before being burnt in the engine of a motorcar.
a) Name the two main products of the combustion of petrol in an excess of air. [2]
b) Pollution from cars is reduced by catalytic converters. A typical converter
contains an alloy of platinum and rhodium as a catalyst to destroy the
pollutants.
i) What part of the Periodic Table contains platinum and rhodium? [1]
ii) Nitrogen oxides and carbon monoxide react together on the catalyst to
produce a relatively harmless mixture of two gases.
Names these two gases. [1]
8. a) One of the general characteristics of homologous series is that all members
can be represented by a general formula.
i) What is the general formula of the alkene series? [1]
ii) Give one other general characteristic of homologous series. [1]
b) i) Ethane, C2H6, reacts with chlorine. State one condition for this reaction. [1]
ii) What type of reaction takes place when ethane reacts with chlorine? [1]
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9. Some vegetable oils contain an organic acid called linoleic acid, which is
unsaturated.
Name the reagent used and give the observation in a simple chemical test
which would confirm that
i) linoleic acid is unsaturated: [2]
reagent:
observation:
ii) linoleic acid is an acid: [2]
reagent:
observation:
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SECTION B (20MARKS)
Answer any two questions on the writing paper provided.
1. Two experiments were carried out to investigate the rate of decomposition of
10cm3 hydrogen peroxide solution, at two different temperatures. The total
volume of oxygen given off was measured and recorded in the table below.
Experiment 1 at 25C
Time/s 0 20 40 60 80 100 120 140
Total volume of oxygen
measured / cm3
0 16 24 31 35 37 38 38
Experiment 2 at 35C
Time/s 0 20 40 60 80 100 120 140
Total volume of oxygen
measured / cm3
0 20 31 36 38 38 38 38
a) Name a catalyst that could be used in this experiment. [1]
b) Plot, and label, graphs of the total volume of oxygen produced against time
on a graph paper. On the same axes, sketch and label the graph you would
expect if the experiment at 25 C was repeated using 10 cm3of hydrogen
peroxide solution, the concentration of which was half that of the original
solution. [4]
c) Draw a suitable apparatus for the experiment. Show how the gas is
produced, dried and collected so that its volume can easily be measured. [3]
d) Describe a suitable test for oxygen. [1]
e) Write an equation to show the decomposition of hydrogen peroxide. [1]
2. Wine which contains ethanol, C2H5OH, may have a sour taste of vinegar after
long storage.
a) (i) Give the name and draw the structure of the acid which caused the sour
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taste.
[2]
(ii) Explain how this acid is formed from ethanol. [1]
b) Ethanol can be made for industrial use by the catalytic addition of steam to
ethene.
C2H4(g) + H2O (g)C2H5OH (g)
i) Name the catalyst and give the necessary conditions for this reaction.
ii) Calculate the maximum mass of ethanol which can be made from 72dm3
of ethene at room temperature and pressure. [5]
c) Ethanol can be reacted with ethanoic acid to form an ester.
Name and draw the structure of this ester. [2]
3. K, Mg, Al, Zn, Fe, H, Cu, Ag are the symbols of the elements which appear in
this order in the activity series, potassium being the most reactive and silver
being the least reactive.
a) Which of them will not displace hydrogen from dilute acids. [1]
b) Which of them will form the most stable hydroxide? [1]
c) Which of them is most likely found free in nature? [1]
d) There is a metal whose oxide can be reduced by carbon but not by
hydrogen. Which metal is it? [1]
e) If mixtures of aluminium and iron (II) oxide and of aluminium (III) oxide and
iron are heated separately, in which mixture will there be a reaction and
why? Give an equation for the reaction. [2]
f) What would you expect to happen if a little powdered zinc was slowly added
to an aqueous solution of copper (II) nitrate and the mixture was well
shaken? Give an ionic equation for the reaction. [3]
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g) Name a metal in the above series which is usually extracted from its molten
oxide by electrolysis. [1]
Section B- Structured Questions (14 marks)
Answer all questions in this section
1.The diagram below shows a drawing of the human alimentary canal.
(a)Name the parts labelled P, R and Sand outline their main function.
P name
_________________________________________________________
function
_________________________________________________________
__________________________________________________
_____[1]
R name
_________________________________________________________
function
_________________________________________________________
__________________________________________________
_____[1]
P
T
S
R
Q
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S name
_________________________________________________________
function
_________________________________________________________
__________________________________________________
_____[1]
(b) Structure P contains a secretion that is produced by the liver. Name this secretion and
describe how it helps in digestion
_____________________________________________________________________
_______
_____________________________________________________________________
_____[2]
2(a) The diagram below shows the cross-section of a mammalian heart.
(i) What is the difference between blood flowing in Aand C?
_____________________________________________________________________
A B
P
R
D C
Q
Y
X
Z
W
T
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___________________________________________________________________[
1]
(ii) Identify and state the function of structure Q
______________________________________________________________
_______
______________________________________________________________
_____[2]
(iii) StructureT is the septum found in the heart.
Suggest a reason why the presence of the septum is important.
___________________________________________________________________
__
___________________________________________________________________[
1]
(b) Red blood cells are an important component of blood. List 2 other components ofblood.
___________________________________________________________________
_____ [1]
3. The diagram below shows a transverse section through part of a plant leaf.
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(a) Briefly explain the role of the cells labelled Din the diagram. [1]
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___________________________________________________________________
(b) Examine the diagram and fill in the table below. [3]
Name of tissue Function
A
B
C
Section C- Essay Questions (16 marks)
Answer any TWOquestions in this section.
Answer any two questions. Question 4(a) is to be answered on the graph on this page while
all other questions are to be answered in the spaces provided.
4. The set up below shows an apparatus used to investigate photosynthesis in pond
weed at different temperatures.
Inverted test-tube
Pond
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The rate of photosynthesis was measured by counting the number of bubbles of
oxygen produced each minute at each temperature. The results of the experiment
are shown in the table below.
Temperature/ oC 0 5 10 15 20 25 30 35 40
Rate of photosynthesis/
bubbles each minute
2 3 7 12 20 36 47 46 5
(a) Plot the results on the graph below.
[2]
(b) Write the word equation for photosynthesis
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______[1]
(c) Explain the shape of the curve between:
i. 10oC and 30oC;
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Fig 5.1
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______[1]
ii. 35oC and 40oC.
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______[1]
(d) State and explain one factor, other than temperature, that affects the rate of
photosynthesis.
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________
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________
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______[3]
5. Fig 5.1 shows the structure of the alveolus where gaseous exchange occurs.
(a) Name the reaction that occurs in the body that uses oxygen and releases carbondioxide.
________________________________________________________________________ [1]
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(b) Write a word equation for the reaction stated in part (a).
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______[1]
(c) Explain how gaseous exchange occurs in the alveolus.
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________
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________
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______[2]
(d) State two adaptations of an alveolus and briefly explain how these adaptations help inthe process mentioned in part (c).
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______[4]
6. Fig. 6.1 shows a section through a flower and Fig. 6.2, a magnified view of its stigma.
Fig. 6.1 Fig. 6.2
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(a) What are structures M?
_____________________________________________________________________
_____[1]
(b) The above flower is unlikely to carry out self-pollination. Write one feature shown in the
diagram that supports this.
_____________________________________________________________________
_____[1]
(c) Explain why cross-pollinated is preferred to self-pollination.
_____________________________________________________________________
_______
_____________________________________________________________________
_______
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_____[2]
(d) State two advantages and two disadvantages of sexual reproduction.
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_____[4]
END OF PAPER
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Answer to Prelim MCQ Section A
Answer to Prelim section B
1(a) PGall bladderstores and secrete bile into the small intestine
RPancreasSecrete pancreatic juices/ hormoneSLarge intestineAbsorb water and mineral salts
1. ( C ) 6. ( D ) 11. ( A ) 16. ( A )
2. ( D ) 7. ( B ) 12. ( B ) 17. ( D )
3. ( D ) 8. ( A ) 13. ( A ) 18. ( A )
4. ( A ) 9. ( C ) 14. ( C ) 19. ( B )
5. ( A ) 10. ( C ) 15. ( C ) 20. ( B )
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1(b) Bile, it emulsifies fats into numerous smaller fats droplets to increase surface to volume
ratio for enzyme lipase to work on.
2(a)(i) A contains deoxygenated blood and C contain oxygenated blood.
2(a)(ii) Q is the bicuspid valve and it prevent blood from flowing back into the left atrium from
the left ventricles
2(a)(iii) To prevent the mixing of deoxygnated and oxygenated blood
2(b)(i) White blood cells, plasma or platelets (any 2)
3(a) To control the opening and closing of the stomata.
3(b)
Name of tissue Function
A
Palisade
mesophyll
Contain chloroplasts and main site of photosynthesis to
take place
B Spongy mesophyll
Contains numerous large lntercellular air spaces to
allow for rapid diffusion of gases.
C Epidermal Protect the internal leaf tissue or to prevent excessiveloss of water through evaporation.
4(a) Correct plotting of points
Curve of best fit
4(b) Carbon dioxide + water oxygen + glucose
4(ci) As the temperature increases, the enzyme becomes more active.
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SECTION A: MULTIPLE CHOICE [20m]
Answer all the questions in this section. For each question, there are four possible answers A, B,
Cand D. Choose the one you consider correct and record your choice in the boxes below.
1. The diagram shows a typical plant cell. Which structure is made of cellulose?
2. The nucleus is the most important part of the cell because ____________________.
A. it assists in energy productionB. it assists in excretionC. it controls the passage of all food particles entering the cell.D. it controls all the activities of the cell
3. Some substances in living organisms move by active transport. Which line is correct foractive transport?
4. Which of thefollowing is an example of
1. ( ) 6. ( ) 11. ( ) 16. ( )
2. ( ) 7. ( ) 12. ( ) 17. ( )
3. ( ) 8. ( ) 13. ( ) 18. ( )
4. ( ) 9. ( ) 14. ( ) 19. ( )
5. ( ) 10. ( ) 15. ( ) 20. ( )
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diffusion in a plant?
A. Carbon dioxide from the air moving into a photosynthesizing leaf.
B. Dissolved minerals moving into the root hairs against a concentration gradient.
C. Sugars in phloem moving from leaves to roots.
D. Water in xylem moving from roots to leaves.
5. Which graph shows the changes in reaction rate when amylase is added to a hotstarch solution and the solution is then cooled down from 80 oC to 0 oC?
A. B. C. D.
6. Which of the following digestive enzymes works best at pH values of 2-3?
A. AmylaseB. MaltaseC. LipaseD. Pepsin
7. A sample of food mixed with water was tested to find out its contents. The results areshown in the table
Test ResultIodine solution added Bluishblack colourBenedicts solution added and mixtureheated
Blue solution
Shaken with ethanol Colourless solutionSodium hydroxide solution addedfollowed by a few drops of coppersulphate solution
Violet colour
What was present in the food?
A. Fat and reducing sugarB. Starch and proteinC. Fat and starchD. Starch only
8. Tennis players often eat bananas during long matches. Which nutrient in bananas is
important during the match?
A Carbohydrate B Fibre C Iron D Vitamin C
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13. The graph shows the effect of changing light intensity on the rate of photosynthesis in
a plant, at two different concentrations of carbon dioxide.
What conclusions can be drawn from the graph?
A. At high light intensities, carbon dioxide limits the rate of photosynthesis.
B. At low light intensities, light intensity has no effect on photosynthesis.
C. Light intensity limits the rate of photosynthesis.
D. When carbon dioxide concentration is low, the plant cannot photosynthesise.
14. Which graph most closely represents the relationship between the rate of
transpiration of a dicotyledonous leaf and the atmospheric humidity?
15. Which substance builds up in a muscle as a result of anaerobic respiration?
A. Carbon dioxide
B. Water
C. Lactic acid
D. Ethanol
16. The table shows a function of red blood cells and white blood cells.
Which row is correct?
Red blood cells White blood cells
AB
Transport of oxygenDestruction of bacteria
Formation of antibodiesFormation of antibodies
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CD
Transport of oxygenFormation of antibiotics
Formation of enzymesDestruction of bacteria
17. The diagrams below show sections through two types of blood vessels.
Which vessel has valves present and which carries blood under the highest
pressure?
Valves present Blood under highest pressure
ABCD
1122
2121
18. Where does implantation of human embryo usually occur?
A. Uterus
B Vagina
C Fallopian tube
D Cervix
19. A woman starts her menstrual period on 1st February
When is she next likely to ovulate?
A 7thFebruary
B 14thFebruary
C 21stFebruary
D 28thFebruary
20. How does the female contraceptive pill prevent pregnacy?
A. It stops menstruationB. It stops ovluation
C. It kills the sperm before it reaches the egg
D. It stops the implantation of the fertilized egg