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]

    ___________________________________________________________________

    ___________________________________________________________________

    (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

    ___________________________________________________________________

    ______[1]

    (c) Explain the shape of the curve between:

    i. 10oC and 30oC;

    ___________________________________________________________________

    _______

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    Fig 5.1

    ___________________________________________________________________

    ______[1]

    ii. 35oC and 40oC.

    ___________________________________________________________________

    _______

    ___________________________________________________________________

    ______[1]

    (d) State and explain one factor, other than temperature, that affects the rate of

    photosynthesis.

    ___________________________________________________________________

    ________

    ___________________________________________________________________

    ________

    ___________________________________________________________________

    ______[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).

    ___________________________________________________________________

    ______[1]

    (c) Explain how gaseous exchange occurs in the alveolus.

    ___________________________________________________________________

    ________

    ___________________________________________________________________

    ________

    ___________________________________________________________________

    ______[2]

    (d) State two adaptations of an alveolus and briefly explain how these adaptations help inthe process mentioned in part (c).

    ___________________________________________________________________

    ________

    ___________________________________________________________________

    ________

    ___________________________________________________________________

    ________

    ___________________________________________________________________

    ________

    ___________________________________________________________________

    ______[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.

    _____________________________________________________________________

    _______

    _____________________________________________________________________

    _______

    _____________________________________________________________________

    _____[2]

    (d) State two advantages and two disadvantages of sexual reproduction.

    _____________________________________________________________________

    _______

    _____________________________________________________________________

    _______

    _____________________________________________________________________

    _______

    _____________________________________________________________________

    _____[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