PAPER 3 Kimia f4 Final Sbp 07 (1)

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FORM 4 CHEMISTRY

Paper 3

Satu jam tiga puluh minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

4541/3

Chemistry

Paper 3

OCTOBER

2007

1 ½ jam

Nama: ………………………………………………. Ting: ………….

BAHAGIAN SEKOLAH

KEMENTERIAN PELAJARAN MALAYSIA

PEPERIKSAAN SELARAS DIAGNOSTIK TINGKATAN 4

1. Tuliskan nama dan tingkatan anda pada

ruangan yang disediakan.

2. Calon dikehendaki menjawab semua

soalan.

3. Calon dikenhendaki membaca maklumat

yang terdapat di halaman 2.

Untuk kegunaan pemeriksa

Soalan MarkahPenuh

MarkahDiperolehi

1 15

2 18

3 17

Jumlah 50

Kertas soalan ini mengandungi 7 halaman bercetak



2

MAKLUMAT UNTUK CALON

1. Kertas soalan ini mengandungi tiga soalan. Jawab semua soalan.

2. Tuliskan jawapan bagi Soalan 1 dan Soalan 2 dalam ruang yang disediakan

dalam kertas soalan.

3. Tuliskan jawapan bagi soalan 3 pada halaman bergaris di bahagian akhir kertas

soalan ini dengan terperinci. Anda boleh menggunakan persamaan, gambar

rajah, jadual, graf dan cara lain yang sesuai untuk menjelaskan jawapan anda

.

4. Tunjukkan kerja mengira, ini membantu anda mendapatkan markah.

5. Rajah yang mengiringi soalan tidak dilukis mengikut skala kecuali dinyatakan

sebaliknya

6. Sekiranya anda hendak membatalkan sesuatu jawapan, buat garisan di atas jawapan itu.

7. Markah yang diperuntukkan bagi setiap soalan atau ceraian soalan ditunjukkan

dalam kurungan.

8. Masa yang dicadangkan untuk menjawab Soalan 1 dan Soalan 2 ialah 45 minit

dan Soalan 3 ialah 45 minit.

9. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh

diprogramkan.

10. Serahkan semua kertas jawapan anda di akhir peperiksaan.

Pemberian markah:

Skor Penerangan

3 Cemerlang: Respons yang paling baik

2 Memuaskan : Respons yang sederhana

1 Lemah : Respons yang kurang tepat

0 Tiada respons atau respons salah



3

Jawab semua soalan.

1.

Figure 1

Combustion spoon with small piece of

metal

oxygen

Table 1

Table 1 shows the electron arrangement of atoms of elements P, Q, and R. In anexperiment, a group of students intend to compare the reactivity of P, Q, and R in the

reaction with oxygen gas. A small piece of the metal is heated in a combustion spoon

until it starts burning. The combustion spoon is then lowered into a gas jar of oxygen gasas shown in figure 1.

a. Tabulate all observations expected from the experiment.

[ 3 marks ]

b Arrange the reactivity of the metal with oxygen in descending order.

-----------------------------------------------------------------------------------------------------[ 3 marks ]

Element Electron arrangement

P 2.1

Q 2.8.1

R 2.8.8.1



4

c Based on the observations in (a), state the inference of the experiment.

-----------------------------------------------------------------------------------------------------

[ 3 marks ]

d List all the variables involved in this experiment.

Manipulated variable

Responding variable

Controlled variable

[ 3 marks ]

e If 2.3g of Q is dissolved in 250cm³ of distilled water, find the concentration of thesolution produced.[ Relative atomic mass : Q, 23 ]

[ 3 marks ]



5

2. A pupil carried out an experiment to construct the electrochemical series of four

pairs of metals using 0.5 mol dm-3

copper (II) sulphate solution as the electrolyte.The set up of the apparatus of this experiment is shown in Figure 2.

Copper (II) sulphate solutionFigure 2

Table 2 shows the voltmeter readings of each cell that he obtained.

Pair of metalsExperiment

Negative electrode Positive electrode

Potential Difference

( V )I Zinc Copper 1.10

II Iron Copper 0.78

III Magnesium Copper 2.72

IV Lead Copper 0.45

Table 2

a Predict the potential difference of the cell when magnesium and lead metals are used.

---------------------------------------------------------------------------------------------------

[ 3 marks ]b For the pair of zinc and copper electrodes, write the overall equation.

---------------------------------------------------------------------------------------------------

[ 3 marks ]

c In experiment 1, describe the change in mass that you would see at the zinc

electrode after 30 minutes.

---------------------------------------------------------------------------------------------------

[ 3 marks ]

d Based on Table 2, arrange zinc, iron, magnesium, lead and copper in ascending

order of tendency to lose electron.

---------------------------------------------------------------------------------------------------

[ 3 marks ]



6

e Classify the ions present in the copper(II) sulphate solution into positive ions and

negative ions.

[ 3 marks ]

f State the hypothesis for this experiment

---------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------

[ 3 marks ]

3

Any pure substance has its own fixed melting point. For example, the

melting point of pure acetamide is 83oC.

You are given two beakers, each containing acetamide A and acetamide B. One

of them is impure acetamide.

Plan an experiment to determine which of the acetamide is pure.

Your planning must include the following items:

(a) Problem statement

(b) All variables involved

(c) Statement of the hypothesis(d) List of materials and apparatus

(e) Experimental procedure

(f) Tabulation of data[ 17 marks ]

END OF QUESTION PAPER



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PAPER 3 Kimia f4 Final Sbp 07 (1)