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    Chapter

    Scientifc Investigation1

    Objective Questions

    1. Which of the following explains

    correctly the meaning of making a

    hypothesis?

    A Making an observation

    B Making a conclusion

    C Making an inference

    D Making a statement relating the

    manipulated variable and the

    responding variable

    2. When a problem has been identied in a

    scientic investigation, the next step is

    A to collect the relevant data.

    B to plan an experiment.C to form a hypothesis.

    D to draw a conclusion.

    3. What is the next step in scientic

    investigation after observing a natural

    phenomenon and wondering why it

    happens?

    A Identifying the problem

    B Planning an investigation

    C Drawing a conclusion

    D Collecting data

    4. Which of the following is observable,

    but not measurable data?

    A Time taken for a change to occurB Rise in temperature

    C Change in colour

    D Voltage produced

    5. Which of the following is not one of

    the processes involved in planning an

    experiment?

    A Controlling variables

    B Recording of data

    C Step-by-step list of procedure

    D Determining apparatus and materials

    to be used

    6. The table shows a set of data obtained

    from an experiment.

    Time (s) 0 30 60 90 120 150 180

    Temperature

    (C)30 32 35 39 48 69 85

    Which of the following charts is most

    suitable to represent the data?

    ATemperature (C)

    Time (s)

    BTemperature (C)

    Time (s)

    CTemperature (C)

    Time (s)

    D

    7. Which of the following is not a suitab

    method of analysing data?

    A Using graphs

    B Using tables

    C Using histogram

    D Using tape recorders

    8. The diagram shows the apparatus use

    in an experiment.

    30 cm3 of water

    What is the responding variable in the

    experiment?

    A Surface area

    B Rate of evaporation

    C Initial volume of water

    D Size of container

    9.Impurities present in water affect th

    boiling point of water.

    Based on the above hypothesis, what

    the responding variable?

    A Presence of impurities

    B Boiling point of water

    C Volume of water

    D Temperature of water

    10. Which of the following are the positiv

    scientic attitudes and noble values

    needed in recording data?

    I Honesty

    II Accuracy

    III CareA I and II only C II and III o

    B I and III only D I, II and II

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    Structured Questions

    1. Diagram 1 shows an experiment.

    2934

    Painted

    white

    Unpainted

    Air

    Painted

    black

    Air Air

    Diagram 1

    (a) Complete the following table based on the diagram.

    Flask Temperature (C)

    Painted white

    Unpainted

    Painted black

    (b) State the following variables in the experiment.(i) Manipulated :

    (ii) Responding :

    (iii) Constant :

    (c) State a hypothesis for the experiment.

    2. Diagram 2 shows the steps involved in a scientic investigation.

    (a) Fill in the blanks with suitable words chosen from those given in the box.

    Collecting data Forming hypothesis Making conclusion

    Identifying

    problem

    Planning

    investigation

    Analysing

    data

    Diagram 2

    (b) The data collected during an experiment can be organised in graphical forms.

    Give three examples of graphical forms that can be used to represent the data obtained in an experiment.

    (i)

    (ii)

    (iii)

    (c) What should be done if the result of an experiment disproves the hypothesis?

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    Chapter

    Body Coordination2

    Objective Questions

    1. Which of the following is not correctly

    given?

    Nervous system

    controls

    Endocrine

    system controls

    A speech. growth.

    B memory. sexual maturity.

    C involuntary

    actions.

    blood glucose

    level.

    D the senses. thinking.

    2. The following diagram shows a neurone.

    What type of a neurone is it?

    A A receptor

    B A motor neurone

    C A relay neurone

    D A sensory neurone

    3. Neurone Xsends impulses from the

    central nervous system to effectors.

    Neurone Xis a

    A receptor.

    B motor neurone.

    C relay neurone.

    D sensory neurone.

    4. Neurones are not directly connected

    to one another. There is always a gap

    between two adjacent neurones.

    This gap is known as

    A myelin sheath. C synapse.

    B dendrite. D cell body.

    5. The path taken by an impulse during a

    certain type of action is shown below.

    Receptor Spinal cord Effector

    Which of the following is an example of

    the type of action?

    A Reading

    B Breathing

    C Coughing

    D Kicking a ball

    6. Which of the following is an involuntary

    action?

    A Swallowing C Speaking

    B Memorising D Thinking

    7. The following diagram shows the human

    brain.

    P

    What is the name of the part labelled as

    P?

    A Cerebrum

    B Cerebellum

    C Spinal cord

    D Medulla oblongata

    8. Which of the following is controlled b

    the cerebrum?

    A Writing

    B SweatingC Digesting

    D Sneezing

    9. The hormones in our body are

    transported by

    A blood.

    B ducts.

    C the nervous system.

    D the excretory organs.

    10. The following diagram shows the

    locations of the major endocrine gland

    in the human body.

    A

    B

    C

    D

    Which of the glands, A, B, C or D,

    secretes hormones when one is indanger?

    Structured Questions

    1. Diagram 1 shows the structure of a neurone.

    Receptor

    P:

    Q:R:

    Diagram 1

    (a) Label the structures, P, Q andR, with their respective names.

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    (b) Name the neurone shown in the diagram.

    (c) What is the function of the receptor?

    (d) On the diagram, draw arrows () to show the direction of movement of an impulse.

    2. Diagram 2 shows some of the differences between nervous coordination and hormonal coordination.

    Nervous coordination Hormonal coordinationDifferences in terms of

    Form of message

    Speed of transmission

    Effectors Parts affected Target organs

    Localised and temporary Effects Widespread and irreversible

    Duration of response

    Diagram 2

    (a) Complete the above graphical organiser.

    (b) Why are the endocrine glands also known as ductless glands?

    (c) Name the endocrine glands that secrete insulin.

    Chapter

    Heredity and Variation3

    Objective Questions

    1. What are the functions of mitosis?

    I It replaces worn out cells.

    II It increases the number of cells.

    III It produces reproductive cells.

    A I and II only C II and III only

    B I and III only D I, II and III

    2. In which of the following organs does

    meiosis take place?

    A Brain

    B Heart

    C Ovary

    D Stomach

    3. Each ovum produced by a woman has

    A 20 chromosomes.

    B 23 chromosomes.

    C 43 chromosomes.

    D 46 chromosomes.

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    4. There are 40 chromosomes in each bone

    cell of a mouse.

    When the bone cell undergoes mitosis,

    how many chromosomes will each of the

    daughter cells have?

    A 20 C 60

    B 40 D 80

    5. A father with curly hair and a mother

    with straight hair have four children, allof them with curly hair.

    What can we conclude based on this

    statement?

    A Both curly hair and straight hair are

    dominant traits.

    B Both curly hair and straight hair

    recessive traits.

    C Curly hair is a dominant trait

    whereas straight hair is a recessive

    trait.

    D Curly hair is a recessive trait

    whereas straight hair is a dominant

    trait.

    6. Plant P which produces red owersis crossed with Plant Q which also

    produces red owers. 3/4 of the rst

    lial generation produce red owers

    whereas 1/4 of them produce white

    owers.

    If R represents the dominant gene for

    red owers and r represents the recessive

    gene for white owers, what are the

    genotypes of Plant P and Plant Q?

    P Q

    A RR rr

    B RR Rr

    C Rr RR

    D Rr Rr

    7. The following diagram shows the results

    of a study on a certain variation among

    some students.

    Numberofstudents

    Trait P

    What can you infer from the diagram?

    A Trait P shows continuous variation.

    B Trait P shows discontinuous

    variation.

    C Trait P might be the blood group.

    D Trait P is determined by genetic

    information only.

    8. Which of the following mutations is

    caused by a change in the number of

    chromosomes?

    A Albinism

    B Downs syndrome

    C Sickle-cell anaemia

    D Colour-blindness

    9. The occurrence of a recessive mutant

    trait, such as colour-blindness, takes

    place

    A equally often in males and female

    B more often in females.

    C only in males.

    D more often in males.

    10. Selective breeding can be done by

    I cloning.

    II articial insemination.

    III embryo transplants.

    A I and II onlyB I and III only

    C II and III only

    D I, II and III

    Structured Questions

    1. Diagram 1 shows the process of mitosis.

    M

    N

    L

    P

    Q

    Diagram 1

    (a) State two functions of mitosis.

    (i)

    (ii)

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    (b) Describe briey what happens at the following stages.

    (i) StageM :

    (ii) Stage P :

    (c) State two characteristics of mitosis.

    (i)

    (ii)

    2. Diagram 2 shows the schematic diagram of a monohybrid cross in pea plants.

    F1generation

    F2generation

    Gametes

    Diagram 2

    (a) Complete the above diagram.

    (b) State the percentage of plants in the F2

    generation that bear

    (i) purple owers :

    (ii) white owers :

    (c) State the ower-colour phenotype ratio of the F2

    generation.

    Chapter

    Matter and Substance4

    Objective Questions

    1. The diagram shows the arrangements of

    particles in two substances.

    X Y

    Which of the following gives correctly

    the states of the two substances?

    X Y

    A Solid Liquid

    B Liquid Gas

    C Gas Liquid

    D Solid Gas

    2. The kinetic theory of matter explains

    A the energy levels of particles and the

    forces between particles in matter.

    B the sizes of particles in matter.

    C the arrangements of particles in

    matter.

    D the types of particles in matter.

    3. The proton number of Atom P is 16 and

    its nucleon number is 32.

    From this we can conclude that

    A Atom P has 32 neutrons.

    B Atom P has 32 electrons.

    C the total number of protons and

    neutrons in Atom P is 32.

    D the total number of protons and

    electrons in Atom P is 16.

    4. The proton number of AtomXis 2 w

    its nucleon number is 4.

    Which of the following represents

    correctly the structure of AtomX?

    A C

    B D

    Indicator

    R : Dominant gene for purple

    flowerr : Recessive gene for white

    flower

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    5. The diagram shows the interconversion

    of states of matter.

    Gas

    Liquid

    Solid

    Q

    P

    R

    S

    Which of the following is not correct?

    Process Name of process

    A P Melting

    B Q Sublimation

    C R Condensation

    D S Freezing

    6. Which of the following are isotopes of

    the same element?

    Isotope

    Proton

    number

    Nucleon

    number

    P 8 16

    Q 7 16

    R 8 17

    S 6 14

    A P and Q C Q and S

    B P andR D R and S

    7. The following gives some physical

    properties of Metal P.

    Soft

    Strong

    Can withstand heat

    P is suitable to be made into

    A electric wires.

    B cooking utensils.

    C cans.

    D doors.

    8. Which of the following is not one of the

    uses of chlorine?

    A To kill germs in swimming pools

    B To make pesticides

    C As a coolant

    D As a bleaching agent

    9. Which of the following bulbs will light

    up?

    I Dry cell

    Bulb

    Sugar

    solution

    II Dry cell

    Bulb

    Salt

    solution

    III Dry cell

    Bulb

    Lime

    juice

    A I and II only

    B I and III only

    C II and III only

    D I, II and III

    10. Which of the following mixtures can

    separated by fractional distillation?

    A Sugar and water

    B Salt and water

    C Oil and water

    D Alcohol and water

    Structured Questions

    1. Diagram 1 shows the set-up of apparatus to obtain pure water from a salt solution.

    Pure water

    P

    Round-bottomed

    flask

    Thermometer

    Retort stand

    Salt solution

    Diagram 1

    (a) Name the above process.

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    (b) (i) Name Apparatus P.

    (ii) State the function of Apparatus P.

    (iii) On the diagram, draw and label arrows () to show how water ows into and ows out of P.

    (c) Name a method used to obtain salt crystals from salt solution.

    2. Diagram 2 shows a set-up of apparatus to investigate the electrical conductivity of various substances.

    Bae

    ry

    Bae

    ry

    Bae

    ry Bulb

    Switch

    Magnesiumstrip

    Batteries

    Diagram 2

    The magnesium strip is then replaced by a lump of sulphur followed by a carbon rod.

    Table 1 shows the observations of the experiment.

    Substance Observation

    Magnesium The bulb lights up.

    Sulphur The bulb does not light up.

    Carbon The bulb lights up.

    Table 1

    (a) State the following variables in the experiment.

    (i) Manipulated :

    (ii) Responding :

    (iii) Constant :

    (b) What is the operational denition for the experiment?

    (c) Based on the results in Table 1, which of the substances conduct electricity?

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    Chapter

    Energy and Chemical Changes5

    Objective Questions

    1. Which of the following statements is not

    true about a chemical change?

    A A new substance is formed.

    B A chemical change does not involveany change of energy forms.

    C A chemical change is difcult to

    reverse.

    D A chemical change may absorb or

    release heat.

    2. What happens when iron lings are

    heated with sulphur powder?

    I The mixture glows brightly.

    II A black solid is formed.

    III A chemical change occurs.

    A I and II only

    B I and III only

    C II and III only

    D I, II and III

    3. Which of the following involves a

    chemical change?

    A

    B Steam

    C

    D

    4. The diagram shows an experiment to

    study the heat change in a chemical

    reaction.

    Ammonium

    chloride

    Thermometer Thermometer

    28C30C

    Water

    What process is involved in the

    experiment?

    A Neutralisation

    B Evaporation

    C Endothermic

    D Exothermic

    5. Which of the following is an

    endothermic reaction?

    A Photosynthesis

    B Burning of magnesium

    C Reaction between a reactive metaland water

    D Neutralisation

    6. When sodium is put into water, the

    temperature of the water increases.

    This is because

    A the reaction absorbs heat from the

    water.

    B it is an exothermic reaction.

    C there is a net gain of energy.D the reaction absorbs heat from the

    surroundings.

    7. The reactants used in the production o

    ammonia are

    A oxygen and nitrogen.

    B nitrogen and hydrogen.

    C hydrogen and oxygen.

    D oxygen and carbon dioxide.

    8. Which of the following metals reacts

    most vigorously with water?

    A Calcium

    B Sodium

    C Magnesium

    D Potassium

    9. Which of the following metals cannot

    extracted from its ore by using carbon

    A Aluminium

    B Iron

    C Zinc

    D Lead

    10. Which of the following characteristic

    of dry cells make it advantageous to u

    dry cells?

    I Light

    II SmallIII Portable

    A I and II only

    B I and III only

    C II and III only

    D I, II and III

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    Structured Questions

    1. Diagram 1 shows the set-up of apparatus for an experiment.

    Ammonium

    chloride

    Water

    30 30

    Temperature : ;

    Diagram 1

    (a) Fill in the blanks in the diagram.

    (b) (i) What type of reaction is shown in Diagram 1 in terms of heat change?

    (ii) Give a reason for your answer in (i).

    (c) The following are some processes involving heat change.

    Combustion of fuels Boiling of water

    Burning of candles Photosynthesis

    Which of the above processes involve heat change(s) similar to that shown in Diagram 1?

    2. Diagram 2 shows the Haber process.

    450 550

    Catalyst Q

    Gas X

    Hydrogen

    Ammonia gas Liquidified ammonia

    Cooled

    Diagram 2

    (a) Name

    (i) GasX :

    (ii) Catalyst Q :

    (b) What is the purpose of carrying out the Haber process?

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    (c) State two uses of ammonia.

    (i)

    (ii)

    (d)When a piece of red litmus paper is dipped into some ammonia solution, the litmus paper turns blue.

    Based on the above information, what inference can you make?

    Chapter

    Nuclear Energy6

    Objective Questions

    1. What is radioactive decay?

    A The decomposition of reactivesubstances

    B The process whereby radioactive

    substances are transformed into

    radiations

    C The decomposition of radioactive

    substances by bacteria

    D The process whereby an unstable

    nucleus emits particles or radiations

    to form a more stable nucleus

    2. Which of the following can be reected

    by an electric eld?

    I Alpha particles

    II Beta particlesIII Gamma rays

    A I and II only

    B I and III only

    C II and III only

    D I, II and III

    3. Which of the following are the uses of

    gamma radiation?

    I Food preservation

    II Sterilisation of medical instruments

    III Pest control

    A I and II only

    B I and III only

    C II and III onlyD I, II and III

    4. Carbon-14 is used to

    A trace the uptake of fertilisers by plants.

    B estimate the ages of ancient remains

    and artifacts.

    C treat cancer patients.

    D kill germs.

    5. Which of the following radiations has

    the highest penetrating power?

    A Alpha particles

    B Beta particles

    C Gamma rays

    D X-rays

    6. Which of the following can be blocked

    by an aluminium plate?

    I Alpha particles

    II Beta particles

    III Gamma rays

    A I and II onlyB I and III only

    C II and III only

    D I, II and III

    7. The diagram shows a certain process.

    High-energy

    neutron

    Radioactive

    nucleus

    This process is called

    A nuclear ssion.

    B nuclear fusion.

    C radioactive decay.

    D decomposition.

    8. In a nuclear reactor, the generation of

    electricity is powered by energy releafrom

    A nuclear ssion.

    B nuclear fusion.

    C radioactive decay.

    D decomposition.

    9. Which of the following are the effects

    radioactive radiation on living things?

    I Infertility

    II Premature aging

    III Mutation of cells

    A I and II only

    B I and III only

    C II and III onlyD I, II and III

    10. Which of the following are the hazard

    caused by the usage of radioactive

    substances?

    I The improper disposal of radioac

    waste

    II The risk of accidents in nuclear

    power stations

    III The long-term effects of nuclear

    pollution

    A I and II only

    B I and III only

    C II and III onlyD I, II and III

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    Structured Questions

    1. Diagram 1 shows a cylindrical container designed to store radioactive substances.

    Cylindrical castlefor storage

    4 mm plug

    Holder

    Active material

    seated in ametal foil

    Diagram 1

    (a) What are radioactive substances?

    (b) (i) Suggest a suitable material to make the cylindrical castle.

    (ii) Explain your answer in (i).

    (c) Predict what would happen if the cylindrical castle were made of paper?

    2. Diagram 2 shows one use of radioactive substances.

    Diagram 2

    (a) State three otheruses of radioactive substances.

    (i)

    (ii)

    (iii)

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    Chapter

    Light, Colour and Sight7

    Objective Questions

    1. Which of the following is not a

    characteristic of images formed in a

    plane mirror?

    A Laterally inverted

    B Virtual

    C Diminished

    D Upright

    2. Which of the following ray diagrams is

    correctly drawn?

    A

    Lens

    B

    Lens

    C

    Lens

    D

    Lens

    3. A convex lens is directed to a building

    situated beyond 2F, where F is the focal

    point of the lens. A screen on the other

    side of the lens is adjusted until a sharp

    image is obtained.

    What are the characteristics of the image

    formed?

    I Virtual

    II Inverted

    III Diminished

    A I and II only

    B I and III only

    C II and III only

    D I, II and III

    4. The diagram shows the formation of an

    image in a pinhole camera.

    What will happen to the image if the

    pinhole is enlarged?

    A It becomes brighter and sharper.

    B It becomes sharper.

    C It becomes larger.

    D It becomes brighter but more

    blurred.

    5. It is given that F is the focal point of a

    convex lens.

    Supposing you use the lens to form theimage of an object, where must you

    place the object so that the image is real,

    inverted and smaller than the object?

    A Beyond 2F

    B At 2F

    C Between F and 2F

    D At F

    6. If a convex lens is placed in front of t

    pinhole of a pinhole camera, the imag

    formed will be

    A blurred but bright.

    B short and big.

    C bright but small.

    D sharp and bright.

    7. Which of the following pairs has

    structures with similar functions?

    In the eye In the camer

    A Iris Film

    B Pupil Aperture

    C Retina Diaphragm

    D Cillary muscles Lens

    8. Which of the following apparatuses c

    disperse light?

    A A plane mirror

    B A prism

    C A periscope

    D A microscope

    9. The diagram shows a beam of white

    light directed to a prism.

    Whitelight

    Cyanfilter

    Yellowfilter

    Whsc

    What is the colour of the strip of lighformed on the white screen?

    A Red C Green

    B Blue D Black

    10. When blue and yellow pigments are

    mixed together, the resulting pigment

    A red. C green.

    B blue. D cyan.

    (b) Explain how radioactive substances are useful for the following purposes.

    (i) Food preservation:

    (ii) Pest control:

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    Structured Questions

    1. A student carried out a series of activities to investigate the images formed by using a concave lens.

    (a) Complete the following ray diagrams to show the formation of images by the concave lens.

    (i)

    2F F F

    Object

    (ii)

    2F F F

    Object

    (iii)

    2F F F

    Object

    (b) State the characteristics of the images formed by a concave lens.

    (c) Based on your drawings in (a), state the relationship between the distance of the object from the lens and the size of the image forme

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    2. Diagram 1 shows the overlapping of three light beams of different colours on a white screen.

    Cyan

    Red

    P Q Green

    Diagram 1

    (a) State the colours that appear in the areas, P and Q, respectively.

    (i) P :

    (ii) Q :

    (b) State the two primary colours of light that can be added to produce cyan-coloured light.

    (c) Based on the diagram, if a green lter is placed over the areas, P and Q, state the colours that will appear in the areas.

    (i) P :

    (ii) Q :

    Chapter

    Chemicals in Industry8

    Objective Questions

    1. What are the substances used to make

    steel?

    I Carbon

    II IronIII Gold

    A I and II only C II and III only

    B I and III only D I, II and III

    2. The hardness of a metal can be increased

    by

    A purication. C alloying.

    B oxidation. D electroplating.

    3. Which of the following is not one of the

    purposes of producing alloys?

    A To prevent corrosion

    B To make metals lighter

    C To make metals harder

    D To improve the appearance of themetal

    4. Superconductors are used in

    I Magnetic Resonance Imaging (MRI).

    II Maglev trains.

    III computers.

    A I and II only C II and III only

    B I and III only D I, II and III

    5. Which of the following is incorrectly

    matched?

    Alloy Product

    A Steel Cooking utensils

    B Pewter Decorative items

    C Bronze Medals and statues

    D Brass Air craft fuselage

    6. Which of the following will decrease

    the production of ammonia in the Haber

    process?

    I Increasing the temperature

    II Reducing the temperature

    III Using iron powder as catalyst

    A I and II only C II and III only

    B I and III only D I, II and III

    7. Which of the following is not one of the

    uses of ammonia?

    A To produce household cleaners

    B To produce nitric acid

    C To produce rubber

    D To kill germs

    8. Which of the following are needed fo

    the production of ammonia?

    A Hydrogen and oxygen

    BNitrogen and oxygenC Hydrogen and nitrogen

    D Carbon dioxide and hydrogen

    9. Urea can be produced from the reactio

    between

    A hydrogen and nitrogen.

    B hydrogen and water.

    C ammonia and carbon dioxide.

    D nitrogen and oxygen

    10. Which of the following steps can be

    taken to control the disposal of indust

    waste in order to avoid pollution?

    I Enforcement of existing laws

    II Application of technologyIII Recycling of waste

    A I and II only

    B I and III only

    C II and III only

    D I, II and III

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    Penerbitan Pelangi Sdn. Bhd. TC 34

    Structured Questions

    1. Diagram 1 shows the arrangement of atoms in iron.

    Diagram 1

    (a) (i) Describe the arrangement of atoms in iron.

    (ii) Based on your answer in (i), explain why iron is malleable.

    (b) Suggest a way to make iron stronger.

    (c) Why is steel stronger than iron?

    (d) Draw, in the space given below, the arrangement of particles in steel.

    (e) State one purpose of producing alloys, other than to make metals stronger.

    2. Diagram 2 shows the production of ammonia by the Haber process.

    Temperature: yCPressure: 200 atm

    Catalyst: Z

    Gas X

    Nitrogen

    Ammonia

    Diagram 2

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    TC 35 Penerbitan Pelangi Sdn.

    (a) Name what is represented by each of the following in the diagram.

    (i) GasX :

    (ii) yC :

    (iii) Z :

    (b) Ammonium salts are the most common articial fertilisers.

    Name twosubstances used to produce ammonium nitrate.

    (c) State two uses of ammonia, other than to produce fertilisers.

    (i)

    (ii)