pmr - sarawak sc paper 2 2010

8/9/2019 pmr - sarawak Sc Paper 2 2010

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SULIT 55/2

JABATAN PELAJARAN SARAWAK

PEPERIKSAAN PERCUBAAN PMR 2010

55/2

SAINS

Kertas 2

Ogos1 am Satu jam 30 minit

[Lihat sebelah

55/2 @ 2010 Hak cipta Jabatan Pelajaran Sarawak SULIT

1. Tulis nama penuh dan angka giliran andapada ruang yang disediakan.

2. Kertas soalan ini adalah dalam BahasaInggeris dan Bahasa Melayu

3. Calon dikehendaki membaca maklumat dihalaman 2.

Kod Pemeriksa

Bahagian SoalanMarkah

Penuh

Markah

Diperoleh

A

1 6

2 6

3 6

4 7

5 7

6 7

B

7 8

8 12

JUMLAH 60

NAMA MURID

ANGKA GILIRAN

Kertas soalan ini mengandungi 19 halaman bercetak


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55/2 @ 2010 Hak Cipta Jabatan Pelajaran Sarawak SULIT

ForExaminers

Use

SECTION A

BAHAGIAN A

[40 marks]

[40 markah]

Answerall questions.

Jawab semua soalan.

1. Diagram 1 shows a cross section of a human eye.

Rajah 1 menunjukkan keratan rentas mata manusia.

Diagram 1

Rajah 1

(a) On Diagram 1, label structures, P, Q and R using the following words:

Pada Rajah 1, labelkan struktur-struktur, P, Q dan R menggunakan perkataan berikut:

(3 marks)

(3 markah)

Lens Retina Vitreous humour

Kanta Retina Gelemaca

P :

R :

Q :

P :


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(b) Draw lines to match each structure of the eye with its function.

Lukis garisan untuk memadankan setiap struktur mata dengan fungsinya.

(3 marks)

(3 markah)

Structure of the eye

Struktur mata

Function

Fungsi

P

Q

R

Detects light and produces nerve impulses

Mengesan cahaya dan menghasilkan saraf

impuls

Maintains the shape of the eyeball and

helps in refracting light

Mengekalkan bentuk mata dan membantu

dalam pembiasan cahaya

Focuses light onto the retina

Menfokuskan cahaya ke atas retina

ForExaminers

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ForExaminers

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2. Diagram 2 shows the growth curve of a human.

Rajah 2 menunjukkan graf lengkungan pertumbuhan manusia.

Diagram 2Rajah 2

(a) Name the stages S, T and U.

Namakan peringkat S, T dan U.

(i) S : ..

(ii) T : .

(iii) U :

(3 marks)(3 markah)

(b) State two physical changes in the body of a girl who is undergoing puberty.Nyatakan dua perubahan fizikal dalam badan seorang perempuan yang mencapaiakil baligh.

(i)

(ii)

(2 marks)(2 markah)

(c) Suggest one class of food required for the physical changes in (b).

Cadangkan satu kelas makanan yang diperlukan untuk perubahan fizikal seperti di(b).

.........................................................................................................................................

(1 mark)(1 markah)

Height(cm)

Height (cm)Tinggi (cm)

Age (years)

Umur (tahun)0 3 10 6518

U

T

S


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3. (a) Diagram 3.1 shows an experiment to study the magnetic field formed when a currentflows through a straight wire.Rajah 3.1 menunjukkan satu eksperimen untuk mengkaji medan magnet yang

dihasilkan apabila satu arus mengalir melalui satu wayar lurus.

Diagram 3.1Rajah 3.1

(i) On Diagram 3.1, draw the lines of magnetic field formed.Pada Rajah 3.1, lukiskan garis medan magnet yang terbentuk.

(1 mark)

(1 markah)

(ii) Based on Diagram 3.1, state the direction of the magnetic field produced.

Berdasarkan Rajah 3.1, nyatakan arah medan magnet yang dihasilkan.

(1 mark)

(1 markah)

(iii) Name one method that can be used to determine the direction of the magnetic

field.Namakan satu kaedah untuk menentukan arah medan magnet.

(1 mark)

(1 markah)

Dry cells

Sel kering

Cardboard

Kadbod

ForExaminers

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ForExaminers

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(iv) Suggest one way to increase the strength of the magnetic field produced.

Cadangkan satu cara untuk menambah kekuatan medan magnet yang terbentuk.

..

(1 mark)(1 markah)

(b) Diagram 3.2 shows an iron nail.

Rajah 3.2 menunjukkan satu paku besi.

Diagram 3.2

Rajah 3.2

(i) What happen to the nail when the current flows through wire that is wound

around the iron nail?

Apakah yang terjadi kepada paku besi apabila arus mengalir melaluidawai melilit pada paku besi?

(1 mark)

(1 markah)

(ii) Name one device that used the concept in (b)(i).

Namakan satu alat yang menggunakan konsep dalam (b)(i).

(1 mark)

(1 markah)

Iron nail

Paku besi


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4 Diagram 4 shows an experiment to study the density of several substances.

Rajah 4 menunjukkan satu eksperimen untuk mengkaji ketumpatan beberapa bahan.

Diagram 4

Rajah 4

(a) (i) Why does the cork float on water?Mengapakah gabus terapung di atas air?

.

(1mark)

(1 markah)(ii) Why does the glass sink in the glycerine?

Mengapakah kaca tenggelam dalam gliserin?

.

(1mark)(1 markah)

(b) Arrange all the substances (glass, ice, cork, corn oil, water and glycerine) according to their

density in an ascending order.

Susun semua bahan (kaca, ais, gabus, minyak jagung, air dan gliserin) mengikut

ketumpatan mengikut susunan menaik.

...

(1mark)(1 markah)

Cork

Gabus

Ice

Ais

Glass

Kaca

Corn oil

Minyak jagung

Water

Air

Glycerine

Gliserin

ForExaminers

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ForExaminers

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(c) (i)Water has a density of 1g / cm. Predict what will happen if turpentine with a

density of 0.9 g/cm is put in the water.

Air mempunyai ketumpatan 1g/cm. Ramalkan apa yang berlaku sekiranya

turpentin dengan ketumpatan 0.9 g/cmdimasukkan ke dalam air.

(1 mark)

(1 markah)

(ii) Give a reason for your answer.

Berikan alasan kepada jawapan anda.

(1 mark)

(1 markah)

(d) An egg sinks in water.

Sebiji telur tenggelam di dalam air.

(i) Suggest a way how you can float the egg in water.

Cadangkan satu cara bagaimana anda dapat mengapungkan telur di dalam air.

(1 mark)

(1 markah)

(ii) Give a reason for your suggestion.

Berikan alasan bagi cadangan anda.

(1 mark)

(1 markah)


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5. Diagram 5 shows an experiment carried out by a student.

Rajah 5 menunjukkan eksperimen yang dijalankan oleh seorang pelajar.

Diagram 5

Rajah 5

(a) What is the aim of the experiment?

Apakah tujuan eksperimen ini?

.............................................................................................................................................

(1 mark)

(1 markah)

(b) (i) State one observation at the end of the experiment.Nyatakan satu pemerhatian pada akhir eksperimen.

.

(1 mark)

(1 markah)

(ii) Give an explanation to your observation.

Berikan keterangan untuk pemerhatian anda.

.....................................................................................................................................(1 mark)

(1 markah)

(c) (i) Name the gas needed for the burning of the candle.

Namakan gas yang diperlukan untuk pembakaran lilin.

...................................................................................................................................(1 mark)

(1 markah)

Gas jarBalang gasBurning candle

Lilin bernyala

Water

Air

Beginning of Experiment

Awal Ekperimen

End of Experiment

Akhir Ekperimen

ForExaminers

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ForExaminers

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(ii) State one other use for this gas.

Nyatakan satu lagi kegunaan gas ini.

..............................................................................................................................

(1 mark)

(1 markah)

(d) Why water does not enter the gas jar at the beginning of the experiment?

Mengapakah air tidak memasuki balang gas pada awal ekperimen?

...

(1 mark)

(1 markah)

(e) What is the percentage of air used for burning?

Berapa peratuskah udara digunakan untuk pembakaran?

.......................................................................................................................................

(1 mark)

(1 markah)


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6. Diagram 6 shows the apparatus set up to investigate the effects of smoking on the lungs.

Rajah 6 menunjukkan radas yang disediakan untuk mengkaji kesan merokok ke atas peparu.

Diagram 6Rajah 6

(a) (i) What happens to the colour of the cotton wool?Apakah yang akan berlaku kepada warna kapas?

(1 mark)(1 markah)

(ii) Give an explanation to your observation.Beri satu penjelasan kepada pemerhatian anda.

(1 mark)(1 markah)

(b) In the experiment, the temperature reading increases. What causes the temperature to

increase?Pada eksperimen tersebut, bacaan suhu meningkat. Apakah menyebabkan suhunyameningkat?

(1 mark)(1 markah)

Thermometer

Termometer

To filter pump

Ke pam penuras

Conical flask

Kelalang kon

U-tubeTiub-U

CigaretteRokok

Cotton

Kapas Bicarbonate indicator

Penunjuk bikarbonat

ForExaminers

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ForExaminers

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(c) In Diagram 5, what inference can be made based on the observation on the bicarbonate

indicator?

Dalam Rajah 5, apakah inferens yang dapat dibuat berdasarkan pemerhatian padapenunjuk bikarbonat?

(1 mark)

(1 markah)

(d) State one harmful effect of cigarette smoke on the human respiratory system.

Nyatakan satu kesan bahaya asap rokok ke atas sistem respirasi manusia.

..

(1 mark)

(1 markah)

(e) Besides cigarette smoke, name one air pollutant that is harmful to our respiratory

system.

Selain daripada asap rokok, namakan satu bahan pencemar yang berbahaya kepadasistem respirasi kita.

(1 mark)

(1 markah)

(f) State two ways to improve air quality.Nyatakan dua cara untuk menperbaiki kualiti udara.

..

.

(2 marks)

(2 markah)


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Section B

Bahagian B

[20 marks]

[20 markah]

Answerall questions.

Jawab semua soalan.7 Diagram 7 shows the organism, J, K, L and M.

Rajah 7 menunjukkan organisma, J, K, L dan M.

Diagram 7Rajah 7

Based on your observation in Diagram 7,

Berdasarkan pemerhatian anda pada Rajah 7,

(a) State the reproductive method of organisms.

Nyatakan kaedah pembiakan organisma.

J: ..

K: ...

L: ..

M: ..

[4 marks ]

[4 markah ]

J K

L M

ForExaminerUse


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ForExaminers

Use

(b) Classify the organisms into two groups based on their own characteristic.

Kelaskan organisma-organisma kepada dua kumpulan berdasarkan ciri-cirisepunya.

[4 marks ]

[4 markah ]

J, K, L, M

Common characteristic

Ciri-ciri sepunya

Name of theorganism

Nama or anisma


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8 Diagram 8 shows an experiment to investigate the effect of the size of solute particles on therate of dissolving.

Rajah 8 menunjukkan satu eksperimen untuk mengkaji kesan saiz bahan larut ke atas kadarketerlarutannya.

P P

Fine sugarGula halus

Time taken to dissolve = 19 s

Masa yang diambil untuk melarut

StirKacau

R R

Stir

Kacau

Time taken to dissolve =.sMasa yang diambil untuk melarut

Sugar cube

Kiub gula

Diagram 8Rajah 8

StirKacau

Q Q

Stir

Kacau

Time taken to dissolve = ..sMasa yang diambil untuk melarut

Coarse sugar

Gula kasar

Stir

Kacau

For

ExaminerUse


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ForExaminers

Use

Procedure:

Prosedur:

i) 5g of sugar of different sizes are being added to 100 cm of distilled water at room

temperature in beakers P, Q and R.

5 g gula yang berlainan saiz dimasukkan ke dalam 100 cm air suling pada suhu bilikdalam bikar P, Q dan R.

ii) Stir the mixtures in beakers P, Q and R at the same rate.

Kacau campuran dalam bikar P. Q dan R pada kadar yang sama.

iii) The time taken for the sugar to dissolve is observed.

Masa yang diambil oleh gula untuk melarut diperhatikan.

(a) In Table 8.1, record the time taken for the sugar to dissolve.

Dalam Jadual 8.1, rekodkan masa yang diambil oleh gula untuk melarut.

Size of solute

Saiz bahan larut

Time taken to dissolve (s)

Masa yang diambil untuk melarut (s)

Fine sugar

Gula halus

Coarse sugar

Gula kasar

Sugar cube

Kiub gula

Table 8.1

Jadual 8.1

[ 3 marks ]

[ 3 markah]

(b) What inference can be made based on the result in Table 8.1?

Apakah inferens yang boleh dibuat berdasarkan keputusan dalam Jadual 8.1?

.

.

[ 1 mark ]

[1 markah]


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(c) Based on the data in Table 8.1, draw a bar chart to show the time taken for the sugarto dissolve in each beaker.Berdasarkan kepada data pada Jadual 8.1, lukis carta bar untuk menunjukkan masayang diambil oleh gula untuk melarut dalam setiap bikar.

(d) Based on the bar chart drawn in 8 (c), state the relationship between the size of the

solute and the time taken for it to dissolve.

Berdasarkan kepada carta bar yang dilukis di 8(c), nyatakan hubungan antara saizbahan larut dengan masa yang diambil untuk melarut.

..

..[ 1 mark ]

[ 1 markah]

[ 3 marks][3 markah}

Size of soluteSaiz bahan larut

Timetakenforthe

sugartodissolve(s)

Masayangdiambiluntukgulalarut(s)

For

ExaminerUse


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For

ExaminersUse

(e) State the variables in this experiment.

Nyatakan pembolehubah dalam eksperimen ini.

Manipulated variable

Pembolehubah yang dimanipulasi

Responding variable

Pembolehubah yang bergerak balas

[ 2 marks ]

[2 markah]

(f) Predict the time taken for the sugar in beaker P to dissolve if the temperature of the

water is 60C.

Ramalkan masa yang diambil oleh gula dalam bikar P untuk melarut sekiranya suhu airitu adalah 60C.

..

[ 1 mark ]

[1 markah]

(g) State the operational definition for the rate of dissolving.

Nyatakan definisi secara operasi untuk kadar keterlarutan.

..

..

[ 1 mark ]

[1 markah]


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INFORMATION FOR CANDIDATES

MAKLUMAT UNTUK CALON

1. This question paper consists oftwo sections : Section A and Section B.

Kertas soalan ini mengandungi dua bahagian : Bahagian A dan Bahagian B.

2. Answerall questions in both sections.

Jawab semua soalan dalam kedua-dua bahagian.

3. Write your answers in the spaces provided in the question paper.

Tulis jawapan anda pada ruang yang disediakan dalam kertas soalan ini.

4. If you wish to change your answer, cross out the answer that you have done.Then write down the new answer.

Jika anda hendak menukar jawapan, batalkan jawapan yang telah dibuat.

Kemudian tulis jawapan yang baru.

5. The diagrams in the questions provided are not drawn to scale unless stated.

Rajah yang mengiringi soalan tidak dilukis mengikut skala kecuali dinyatakan.

6. Marks allocated for each question or sub-part of a question are shown in brackets.

Markah yang diperuntukkan bagi setiap soalan atau ceraian soalan ditunjukkan dalam

kurungan.

7. You may use a non-programmable scientific calculator.

Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogram.

8. Hand in this question paper to the invigilator at the end of the examination.

Serahkan kertas soalan ini kepada pengawas peperiksaan pada akhir peperiksaan


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1

PEPERIKSAAN PERCUBAAN PMR 2010

MARKING SCHEME

SKEMA PERMARKAHAN

SUBJECT CODE 55 / 2

SUBJECT SCIENCE

PAPER TWO

QUESTION

SOALANANSWER IN ENGLISH VERSION /

JAWAPAN DALAM VERSI BAHASA MELAYU

MARK

MARKAH

1 (a)

(b)

Students should be able to label the parts of the microscope correctly

P: Lens /Kanta

Q: Vitreous Humuor / Gelemaca

R: Retina /Retina

Students should be able to match the structure of the eyes with its function

correctly.

1

1

1

1

1

1

Total 6

P

Q

R

Detects light and produces nerve

impulses.

Mengesan cahaya dan menghasilkansaraf impuls

Maintains the shape of the eyeball and

helps in refracting lightMengekalkan bentuk mata danmembantu dalam pembiasan cahaya

Focuses light onto the retina.

Menfokuskan cahaya ke atas retina


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2

QUESTION

SOALANANSWER IN ENGLISH VERSION /


MARK

MARKAH

2

(a)

A student should be able to name the stages of human correctly;

(i) Infancy/Bayi(ii) Adolescence/Remaja(iii) Adulthood/Dewasa

1

1

1

(b)

A student should be able to state two physical changes in the body of a girl during

puberty correctly.

(i) Enlargement of breasts/Pembesaran buah dada//(ii) Hips become wider and rounder/Punggung menjadi lebar dan bulat //(iii) Menstruation begins/Haid bermula //(iv) Rapid increase in height/Peningkatan pesat dalam ketinggian //(v) Growth of armpit hair and pubic hair/Pertumbuhan bulu ketiak dan bulu pada

bahagian kemaluan //

(vi) Ovaries release ova or egg/Ovari mengeluarkan ovum atau telur //

2

(c) A student should be able to suggest one calls of food required correctly

Protein/Protein // Mineral/Mineral// Carbohydrates/Karbohidrat 1

TOTAL 6


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3 (a) (i) A student should be able to draw the lines of magnetic field correctly.

Accept if the student just draw a line without the direction

1

(ii) A student should be able to state the direction correctly;

Clockwise/Ikut arah jam 1

(iii) A student should be able to name the method used correctly;

Using plotting compass// Menggunakan Kompas penanda //

Compass/Kompas //

Right hand grip rule/Petua Genggaman Tangan Kanan @ Hukum GenggamanTangan Kanan.

1

(iv) A student should be able to suggest one way to increase the strength of the

magnetic field correctly;

Increase the number of dry cell/Tambah bilangan sel kering //

Increase the size of wire/Tambah saiz dawai1

(b) (i) A student should be able to answer correctly.

It will become magnetised/Ia menjadi magnet//

Become electromagnet/Menjadi elektromagnet

1

(ii) A student should be able to name the device correctly.

Fire alarm/Pengera kebakaran //

Electric Door Bell/Loceng pintu elektrik//

Crane/Kren//

Telephone/Telefon//

(any relevant answer/jawapan yang berkaitan)

1

TOTAL 6


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4

QUESTION

SOALAN

ANSWER IN ENGLISH VERSION /


MARK

MARKAH

4 (a)

(i)

(ii)

A student should be able to give reason correctly

The density of cork is less than the density of water/Ketumpatan gabus kurangdaripada ketumpatan air//

The density of water is more than the density of cork/Ketumpatan air lebihdaripada ketumpatan gabus

The density of glass is more than the density of glyserine/Ketumpatan kacalebih daripada ketumpatan gliserin //

Density of glyserine is less than the density of glass/Ketumpatan gliserin

kurang daripada ketumpatan kaca//

1

1

(b) A student should be able to arrange all the substances according to their

density in ascending order correctly;

Cork, Corn oil, Ice, Water, Glyserine, Glass/Gabus, Minyak Jagung, Ais, Air,Gliserin, Kace

1

(c)

(i)

(ii)

A student should be able to answer correctly.

Turpentine will float on water/Turpentin akan terapung di atas air

The density of turpentine is less than the density of water/Ketumpatanturpentine adalah kurang daripada ketumpatan air

1

1

(d)

(i)

(ii)

A student should be able to answer correctly

Dissolve a lot of salt in the water/Larutkan garam yang banyak di dalam air

Salt increase the density of water/Garam meningkatkan ketumpatan air//

The egg floats if the density of water is more than the density of eggs/Telurakan terapung apabila ketumpatan air adalah lebih daripada ketumpatan telur

1

1

TOTAL 8


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5

QUESTION

SOALAN



MARK

MARKAH

5 (a) A student should be able to state correctly;

To find the percentage of oxygen in air/Menentukan peratus oksigen

dalam udara

1

(b) A student should be able to state correctly;

(i) The candle is extinguished/goes out/Lilin itu padam(ii) Water level rises/Paras air meningkat

1

1

(c)

(i)

(ii)

A student should be able to name the gas and the uses correctly

Oxygen/Oksigen

Respiration/Respirasi.// Decomposition/Penguraian //

Rusting/Pengaratan

1

1

(d) A student should be able to give reason correctly

Air occupies space/Udara memenuhi ruang1

(e) A student should be able to answer correctly

20% // 20 // 20/100

1

TOTAL 7


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6

QUESTION

SOALAN



MARK

MARKAH

6 (a)

(i)

(ii)

A student should be able to answer correctly;

Cotton wool becomes stained/turns brown //Kapas bertukar

warna/menjadi warna coklat

Cigarette smoke contains tar or tobacco tar/Asap rokok mengandungi taratau tar tembakau

1

1

(b) A student should be able to give reason correctly:

Heat from the cigarette smoke/Haba daripada asap rokok1

(c) A student should be able to answer correctly;

Cigarette smoke contains acidic gases/Asap rokok mengandungi gasberasid 1

(d) A student should be able to answer correctly;

Lung cancer/kanser paru-paru // Bronchitis/Bronkitis // Emphysema/Asthma/Asma //

1

(e) A student should be able to answer correctly

Sulphur dioxide, nitrogen dioxide, carbon monoxide //

Sulfur dioxide, Nitrogen dioksida, karbon monoxide

1

(f) A student should be able to answer correctly

Ban open burning/Melarang pembakaran terbuka//Car polling/Berkongsi Kereta //

Prohibit smoking/Melarang merokok

1

1

TOTAL 8


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7

QUESTION

SOALAN



MARK

MARKAH

7 (a ) A student should be able to state the reproductive method of the

organisms correctly:

J: Spore formation/Pembentukan sporaK: Seeds/Biji benihL: Seeds/Biji benihM: Spore formation/Pembentukan spora

1 for

every

characteris

tic( max. 4 )

7 (b) A student should be able to classify J, K, L and M into two groups,

based on common characteristics

Accept any relevant answer/Terima sebarang jawapan yang berkaitan

2 in

pairs

2

TOTAL 8

J, K, L, M

(No Seeds/Tiada bijihbenih)Fern/Paku pakis//

Mushroom/Cendawan

(Seeds/Bijih benih)Balsam Plant/Pokokkeembung//Sunflower/BungaMatahari

Reproduce through

the

seeds/spore/flower/sex

ually//

Membiak melalui bijibenih/spora/

bunga/seks

Not reproduce through

seeds/spore/flower/sexu

ally//

Tidak membiak melaluibiji benih/spora/bunga/seks

Name of the

organisms/Na

ma organisma

Common

characteristic

Ciri sepunya


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8

QUESTION

SOALAN



MARK

MARKAH

8 (a) Student should be able to record time taken for this experiment:

Size of solute

Saiz bahan larutTime taken to dissolve (s)/

Masa yang diambil untuk larut (s)

Fine sugar

Gula halus

19

Coarse sugar

Gula kasar36

Sugar cube

Kiub gula53

1

1

1

(b) Student should be able to state the inference.

The rate of dissolving depends on the size of the solute particles/Kadarketerlarutan bergantung kepada saiz partikel bahan larut //The size of solute particles affect/influence the rate of dissolving / Saiz

partikel bahan larut mempengaruhi kadar keterlarutan

1


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9

QUESTION

SOALAN



MARK

MARKAH

(c) Student should be able plot a graph to show the temperature of the water

in the beakers.3 points

correct 2

marks

2 points

correct 1

mark

1 point

correct 0

marks

Tidy and

neat

presentati

on 1

mark

(Size of

the bars

should be

the same)

8

(d) Student should be able to state the relationship between the size of the

solute and the time taken for it to dissolve correctly.

The finer the size of the solute particles, the faster the rate of

dissolving/Semakin halus size partikel bahan larut, semakin cepat kadarketerlarutanya.//The coarser the size of the solute particles, the slower the rate of

dissolving / Semakin kasar size partikel bahan larut, semakin lambatkadar keterlarutannya

1

(e) Student should be able to state the variables of the experiment correctly.

Manipulated variable

Pembolehubah yang dimanipulasiSize of solute particles/Saiz

partikel bahan larut

Responding variable

Pembolehubah yang bergerak balasThe time taken for the sugar to

dissolve/Masa yang diambiloleh gula untuk larut

1

1

Size of solute/Saiz bahan larut

Timetakenforthesugartodissolve(s)

Masaand

iambiluntukulalaruts

10

20

0

30

40

50

60

Fine Sugar

Gula halusCoarse Sugar

Gula kasarSugar cube

Kiub gula


29/29

SULIT 55/2

55 / 2

10

QUESTION

SOALAN



MARK

MARKAH

(f) Student should be able to predict the time taken for the sugar to dissolve

correctly.

Less than 19 s /Kurang daripada 19 saat

1

(g) Student should be able to define operationally rate of dissolving

The time taken for the solute to dissolve

Masa diambil oleh bahan larut untuk larut. 1

TOTAL 12

END OF THE MARKING SCHEME

pmr - sarawak sc paper 2 2010

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