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SCIENCE

FORM 4

MODULE 4

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ENERGY AND CHEMICAL CHANGE

MINISTRY OF EDUCATION MALAYSIA

2

MODULE 4: ENERGY AND CHEMICAL CHANGE Arahan:

1. Modul ini mengandungi tiga puluh tiga soalan. Semua soalan adalah dalam bahasa Inggeris.

2. Modul merangkumi enam konstruk yang diuji

K1 - Memahami soalan dalam bahasa Inggeris K3 - Memahami istilah sains dalam bahasa Inggeris K5 - Menguasai konstruk pengetahuan K6 - Menguasai konstruk kefahaman K7 - Menguasai konstruk kemahiran K10 - Memahami pengajaran dan pembelajaran dalam bahasa Inggeris

3. Murid hendaklah menulis maklumat diri dalam kertas jawapan objektif disediakan. Murid juga perlu memastikan maklumat konstruk, nombor soalan dan jumlah soalan seperti yang dibaca oleh guru di dalam ruangan disediakan dalam kertas jawapan objektif sebelum ujian.

4. Bagi soalan objektif, anda perlu menandakan jawapan dengan menghitamkan

pilihan jawapan pada pilihan jawapan A , B , C atau D pada kertas jawapan objektif.

Contoh:

Antara berikut, yang manakah haiwan?

A. Pokok B. Kambing C. Kereta D. Pen

5. Untuk soalan subjektif, jawapan hendaklah ditulis pada kertas berasingan

yang disediakan oleh guru. 6. Bagi soalan 31 hingga 33, murid hendaklah mendengar arahan daripada guru.

7. Jawab semua soalan.

Modul ini mengandungi 17 halaman bercetak

D A B C E

3

1 Which of the following figure describe exothermic reaction? Before After Before After Before After 2 Electrodes are substance that are immerse into an electrolyte to allow electricity

to flow. Base on the figure shown, which part is electrodes? Electrolyte

Exothermic reaction, heat energy is released into the environment. Endothermic reaction, heat energy from the environment is absorbed during the reaction.

C

B

Carbon rod A D

A

A C B

27 °C 35 °C 27 °C

35 °C 27 °C 27 °C

4

3 Name the process which takes place?

A Distillation B Electrolysis C Evaporation D Neutralization

4 Figure shows the set up of apparatus for electrolysis. Which of the following is an anode?

Cathode Anode

+- -

+

Carbon rod A D

A

B

C

5

5 Which of the following uses the above set up of apparatus?

A Electrolysis B Simple cell C Purification D Electroplating

6 Which of the following is/ are the advantages of lead-acid accumulator?

I high current II rechargeable III electrolyte can spread easily

A II only B III only C I and II only D I and III only

Copper plate

V

Zinc plate

Electrolyte

6

7 Based from the graph above, name the process before after

A Exothermic B Endothermic C Physical change D Chemical change

8 Which of the following cell are used in car and motorcycles?

A Alkaline battery B Lead acid accumulator C Nickel-cadmium battery D Silver oxide-mercury battery

9 Which of the following devices use alkaline batteries?

I stopwatch II camera flashes III walkman

A I only B I and II only C II and III only D I and III only

Energy

Reactants

Products

∆ H = positive

Time

7

10 Which of the following metal is the most reactive metal?

A Lead B Sodium C Copper D Magnesium

11 Figure shows part of the arrangement of elements in reactivity series. More reactive Name the possible element for X.

A Aluminium B Cuprum C Stanum D Ferum

12 Which of the following chemical reaction involved light? I Carbon dioxide + water glucose + oxygen II Silver bromide Silver + Bromine III Sulphur + Oxygen Sulphur dioxide

A I and II only B I and III only C II and III only D I, II and III

Calcium

Sodium

Lead

X

Chlorophyll

8

13 Which of the following reaction is a method extraction pure Tin from Tin (IV) oxide?

A Heating Tin (IV) oxide in air B Electrolysis of the molten Tin (IV) oxide C Heating mixtures of Tin (IV) oxide carbon D Tin (IV) oxide react with hydrochloric acid

14 A physical change involves only a change in physical properties.

Base on the statement which of the following best describes physical change?

A Eggs harden when boil them B Candle wax melts into liquid C Heating magnesium strip D Burn papers

15 Chemical changes are to form a new substance and cannot be easily change

back. Which of the following is a chemical change?

A Formation of ice B Rusting of iron nails C Making knife from a piece of steel D Evaporation of water to water vapour

16 Burning of magnesium ribbon can cause chemical changes. Which of the following is true?

I Produce new substances II The product is reversible III The substances form with different chemical properties

A I and II only B II and III only C I and III only D I, II and III

9

17 Which of the substance is an ionic compound? A C B D 18 What is change when sugar is dissolved in water?

A Size of particle B Its physical properties C Its chemical properties D Its decreases the energy level

19 Tin is usually extracted from its ore by using carbon because

A tin is more reactive than carbon B carbon is more reactive than tin C tin is decompose during heating D carbon is very expensive

H2O

H2O

H2O

H2O

H2O H2O

water

Cl- Cl-

Cl-

Cl-

Na+

Na+

Na+

Na+

Sodium chloride C6H12O6

C6H12O6

C6H12O6

C6H12O6

C6H12O6

Glucose

Pb

Pb

Pb

Pb

Pb Pb

Pb

Pb Pb

Pb Pb

Pb

Pb

Pb

Pb Pb Pb Pb

Pb Pb

Lead

10

20

Base on the figure above, what is X and Y?

X Y A Anode Cathode

B Cathode Anode

C Anions Cations

D Cations Anions

11

21 Determine the graph that shows the reaction release heat. A B C D 22 Boiling water is physical changes. This is because

A water turns cloudy B energy is released C involve the charge in state of matter D it forms hydrogen and oxygen gas

Energy Energy

Energy Energy

Product

Product Reactant

Reactant

time time

time time

12

23 Figure shows a purification of silver. Which of the following represented by M and N?

M N A Pure silver metal Impure silver metal

B Impure silver metal Pure silver metal

C Pure silver metal Pure silver metal

D Impure silver metal Impure silver metal

24

Base on the figure given, what will happen to the voltmeter reading if the Copper (II) sulphate solution is replaced with sugar solution?

A zero B unchanged C less than 1.4V D more than 1.4V

A

N

M

13

25 The figure shows the electroplating of iron spoon with copper.

Which of the statement is true about the electroplating process? I the copper atom ionized to form copper ions at the anode II copper ion is discharged at cathode III the colour of electrolyte unchanged A I only B I and II only C II and III only D I, II and III

26 Which of the following reaction represent the above equation? A B C D

Metal + acid salt + Hydrogen gases

Sodium hydroxide +Hydrochloride acid Sodium dioxide + Hydrogen gases

Zinc + Hydrochloride acid Zinc chloride + Hydrogen gases

Sodium + water Sodium hydroxide + Hydrogen gases

Zinc + Copper (II) sulphate Zinc(II) sulphate + Hydrogen gases

14

27 Which of the statement is TRUE about the graph?

I The energy in the reactant is higher than products II The heat is released to the surrounding III The temperature is increases

A II only B I and II only C II and III only D I,II and III

28 Based on the above equation, why this reaction classify as exothermic reaction?

A Energy is released B Heat is not produced C The heat change, ∆H is negative D Does not involved in energy change

29 State the process that prevent sardine’s can from rusting

A Refining B Extraction C Purification D Electroplating

Energy

Time

Sodium + water

Sodium hydroxide + hydrogen

Nitrogen gases + Hydrogen gases Ammonia gases ∆H = negative

15

30 How do you help your family to reduce the cost of electrical energy?

A Iron the clothes when needed only. B Replace the bulb with fluorescent light C Open the windows while switching on the air-conditioner D Boil water using heater every time preparing a hot drink

Question 31 to 33 Listen to the teacher and follow the instructions given. Then, answer the question. 31 Name the type of reaction which releases heat to the surrounding?

A Exothermic B Electrolysis C Endothermic D Electroplating

32

Which metal is the most reactive?

A Sodium B Calcium C Magnesium

16

33

Which of the following process is used to extract aluminium from its ores?

A Electroplating B Refining C Electrlysis

16 17

18

19

20

A B C D E

A B C D E

A B C D E

A B C D E

A B C D E

21 22

23

24

25

A B C D E

A B C D E

A B C D E

A B C D E

A B C D E

26 27

28

29

30

A B C D E

A B C D E

A B C D E

A B C D E

A B C D E

Tahun/ Tingkatan : 4 Mata Pelajaran: SAINS

GUNAKAN PENSIL 2B ATAU BB SAHAJA. TENTUKAN TIAP-TIAP TANDA ITU HITAM DAN MEMENUHI KESELURUHAN RUANG. PADAMKAN HINGGA HABIS MANA-MANA TANDA YANG ANDA UBAH

SILA HITAMKAN JAWAPAN DI BAWAH MENGIKUT HURUF JAWAPAN YANG ANDA PILIH

KEMENTERIAN PELAJARAN MALAYSIAKERTAS JAWAPAN OBJEKTIF

Ujian Diagnostik

5152

53

54

55

A B C D E

A B C D E

A B C D E

A B C D E

A B C D E

5657

58

59

60

A B C D E

A B C D E

A B C D E

A B C D E

A B C D E

4647

48

49

50

A B C D E

A B C D E

A B C D E

A B C D E

A B C D E

4142

43

44

45

A B C D E

A B C D E

A B C D E

A B C D E

A B C D E

31 32

33

34

35

A B C D E

A B C D E

A B C D E

A B C D E

A B C D E

36 37

38

39

40

A B C D E

A B C D E

A B C D E

A B C D E

A B C D E

1 2

3

4

5

A B C D E

A B C D E

A B C D E

A B C D E

A B C D E

6 7

8

9

10

A B C D E

A B C D E

A B C D E

A B C D E

A B C D E

11 12

13

14

15

A B C D E

A B C D E

A B C D E

A B C D E

A B C D E

Konstruk No. Soalan Jumlah Soalan

Bilangan Soalan Gagal Dijawab

Kegunaan Guru

K1

K3

K5

K6

K7

K10

1-2

3-5

6,8-13

7,14-23

24-30

31-33

2

3

7

11

7

3

1

9

2

3

10

4

5

6

7

8

Nama Pelajar:

Nama Sekolah: Modul: 4