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smkaat/us1/chem/f4/2013

SMK AMBROSE, AYER TAWAR

PEPERIKSAAN UJIAN SELARAS 1 2013

CHEMISTRY FORM 4 ( 1 JAM)

NAME: FORM: 4 Science 1

This paper consists of part A (multiple choices questions), part B (structured question) and part

C (essay question). Answer all the questions.

PART A: MULTIPLE CHOICES QUESTION

1. What is the first step in a scientific

investigation?

Apakah langkah pertama dalam kaedah

saintifik?

A Making a hypothesis

Membuat hipotesis

B Making an observation

Membuat pemerhatian

C Identifying the problem

Mengenal pasti masalah

D Planning an experiment

Merancang eksperimen

2. Which substance is an element?

Yang manakah bahan yang merupakan

unsur?

A Air

UdaraB Stim

Wap

C Carbon Karbon

D Naphthalene

Naphtalena

Diagram 1

3. Diagram 1 shows the particles

arrangement of a substance at room

temperature. This arrangement ofparticles can be found in

Rajah 1 menunjukkan susunan zarah

bahan pada suhu bilik. Susunan zarahini dapat dilihat dalam

A carbon

B copper

C oxygenD water

4. Which of the following processes,

proved the kinetic theory of matter?

Yang manakah antara proses berikut

membuktikan teori kinetik jirim?A Diffusion

Serapan

B Photosynthesis Fotosintesis

C Respiration

RespirasiD Neutralization (peneutralan)

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Diagram 2

5. Diagram 2 shows the apparatus set - up

to investigate Process X. What isProcess X?

Rajah 2 menunjukkan susunan radas

untuk menyiasat proses X. apakahproses X?

A Diffusion

B CondensationC Evaporation

D Sublimation

Diagram 3

6. Diagram 3 shows the change of state of

matter. Which of the following is

process X?Rajah 3 menunjukkan perubahan pada

keadaan jirim. Yang manakah adalah

proses X?

A melting

B boiling

C freezingD condensation

Diagram 4

7. Diagram 4 shows the inter conversion of

water, steam and ice. In which

conversion do H2O molecules lose

speed?

Rajah 4 menunjukkan perubahan

berbalik bagi air, stim dan ais. Manakah

keadaan di manakah molekul air akan

kehilangan kelajuan?

A Ice> water

B Ice> steam

C Water> steamD Steam> ice

8. The melting point and boiling point of

substance M is -37 C and 5 C

respectively. The physical state of

substance M at room temperature is

Takat lebur dan takat didih bagi bahan

M masing-masing ialah -37 C dan 5

C. keadaan fizikal bagi bahan M pada

suhu bilik ialah

A gas

B liquid

C solid

D gas and liquid

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Substance Melting point Boiling point

W -187 C -126 C

X -78 C 70 C

Y 75 C 130 C

Z 114 C 444 C

Table 1

9. Table 1 shows the melting point and

boiling point of substances W, X, Y and

Z. Which substance is a liquid at room

temperature?

Rajah 1 menunjukkan takat lebur dan

takat didih bagi bahan W, X, Y, dan Z.

Yang manakah antara bahan berikutcecair pada suhu bilik.

A WB XC Y

D Z

Substance Melting point Boiling point

P -59 C 60 C

Q 48 C 130 C

R -110 C -70 C

S 128 C 470 C

Table 2

10. Table 2 shows the melting and boiling

points of substances P, Q, R and S.

Which of the following substances has

the highest kinetic energy at roomtemperature?

Rajh 2 menunjukkan takat didih dan

takat lebur bagi bahan P, Q, R, dan S.

Yang manakah antara bahan berikutmempunyai tenaga kinetik paling tinggi

pada suhu bilik?A PB Q

C R

D S

11. Which of the following atomic

models was proposed by Ernest

Rutherford?

yang manakah antara model atom berikut

diperkenalkan oleh Ernest Rutherford?

A The atom is the smallest particle

Atom ialah zarah terkecil

B The atom is a positively charged sphere

Atom ialah sfera bercas positif

C The atom contains a nucleus that is

surrounded by electrons moving at random

Atom mengandungi nukleus yang

dikelilingi oleh elektron yang bebas

bergerak

D The atom contains a nucleus that issurrounded by electrons that move in certain

shells.

Atom mengandungi nukleus yang

dikelilingi oleh elektron yang bergerak dalm

petala.

11. Which of the following scientists

discovered proton?

Yang manakah antara saintis berikutyang menjumpai proton?

A Neils Bohr

B J. J ThomsonC James Chadwick

D Ernest Rutherford

12. Which of the following statements is

true about atomic model proposed by

Ernest Rutherford?

Yang manakah antara keterangan di

bawah benar tentang model atom yang

diperkenalkan oleh Ernest Rutherford?

A The electrons in an atom move in shells

around the nucleus which contains proton.

Elektron dalam atom bergerak dalam

petala mengelilingi nukleus yang juga

mengandungi proton.

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B The atom was described as a sphere of

positive charge embedded with electron.

Atom dilihat sebagai sfera yang bercas

positif bersama dengan elektron.

C The nucleus of the atom contains proton

and neutrons.

Nukleus atom mengandungi proton dan

neutron.

D The nucleus of the atom contains proton.

Nukleus atom mengandungi proton.

14. Diagram 5 shows a model of an atom.

Diagram 5

Who introduced this model?Siapakah yang memperkenalkan model ini?

A Neils Bohr

B John DaltonC J.J. Thomson

D Ernest Rutherford

15. The nucleus of an atom contains Nukleus atom mengandungi

A electrons only

B neutrons only

C both protons and neutronsD both protons and electrons

16. Diagram 6 shows the atomic

representation of an atom

Diagram 6

Number 23 refers to

Nombor 23 merujuk sebagai

A nucleon numberB number of proton

C atomic number

D number of neutron

17. The information below shows the

electron arrangement and the number of

neutrons in an atom Y. Y is not the actual

symbols of elements.Maklumat di bawah menunjukkan susunan

elektron dan nombor neutron dalam atom Y.

Electron arrangement 2.8.3

Number of neutrons 14

Which of the following symbol represents

the atom Y?

Yang manakah simbol berikut mewakili

atom Y?

18. Which of the following electron

arrangement of an atom has eight electrons

valence?

Yang manakah di antara susunan elektron

atom yang mempunyai lapan elektron

valens?

A 2.6

B 2.8.2

C 2.8.8

D 2.8.8.2

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19. Carbon-14 is an isotope of carbon. What is the use of carbon-14?

Carbon-14 ialah isotop bagi karbon. Apakah kegunaan karbon-14?

A Estimate the age of fossils and artefacts

Menganggarkan umur fosil dan artifak

B Radiotherapy for the treatment of cancer

Radioterapi untuk rawatan kanser

C Regulate the heartbeats of patients with heart problems

Mengenal pasti denyutan jantung pesakit dengan masalah jantung

D Destroy bacteria in food without changing the quality of food

Memusnahkan bakteria dalam makanan tanpa mengubah kualiti makanan tersebut

20. Which of the following isotopes is used in archaeology?

Yang manakah isotop berikut digunakan dalam arkeologi?

A Cobalt-60B Carbon-14C Iodine-131D Phosphorus-32

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PART B: STRUCTURED QUESTIONS

1. Figure 1 shows the setup of the apparatus used in an experiment to determine the

melting point and freezing point of substance X.

Rajah 1 menunjukkan susunan radas untuk menentukan takat lebur dan takat

didih untuk bahan X?

(a) Why is a water bath used to heat the substance X?

Mengapa air panas digunakan untuk memanaskan bahan X?

_____________________________________________________________________

[1 M]

(b) Graph 1 show the temperature against time when solid of substance X is heated.

Graf 1 menunjukkan suhu melawan masa apabila pepejal bahan X dipanaskan.

Graph 1

(i) What is the melting point of substance X?

Apakah takat lebur bahan X?

_______________________________________________________________

[1 M]


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(ii) State the physical state of substance X at point M.

Nyatakan keadaan fizikal bahan X pada titik M.

_______________________________________________________________

[1 M]

(iii) State the change of kinetic energy along the region AB.Nyatakan perubahan tenaga kinetic sepanjang AB.

_______________________________________________________________

[1 M]

(iv) Draw the arrangement of particles of substance X at 60 C and 90 C.

Lukis susunan zarah bahan X pada suhu 60 oC dan 90 oC.

[2M]

60 C 90 C

(v) Explain why the temperature remains constant from point B to pointC?

Terangkan kenapa suhu kekal sama dari titik B ke titik C?

_______________________________________________________________

_______________________________________________________________

[2 M]

(c) A substance Y has a melting point of 150 C. Predict whether the melting point of

Y can be determined using the water bath. Explain why?

Bahan Y mempunyai takat lebur 150 C. ramalkan samada takat lebur Y boleh

ditentukan menggunakan air panas. Terangkan kenapa?

__________________________________________________________________

__________________________________________________________________

[2 M


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2. Table 3 shows the proton number and nucleon number for atoms P, Q, R and S.

The letters used do not represent the actual symbols of the atoms.

Jadual 3 menunjukkan nombor proton dan nombor nucleon untuk atom P, Q, R,

dan S.

Atom Proton number Nucleon number

P 6 12

Q 6 14

R 11 24

S 12 24Table 3

(a) What is meant by proton number? Which scientist discovered it?

Apakah maksud nombor proton?saintis manakah yang menjumpainya?

____________________________________________________________________

_

[2 M]

(b) Determine the number of neutrons in these atoms. [2M]

Tentukan nombor nuetron

(i) P : ___________________________

(ii) R : ___________________________

(c) Write the symbol for atom Q in the form ofAzX [1M]

Tulis symbol atom Q dalam bentukAzX.

(d) For the atom S:

(i) Write the electron arrangement. [1M]

Tuliskan susunan electron.

_______________________________________________________________

[1 M]

(ii) State the number of valence electron. [1M] Nyatakan bilangan electron valens.


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_______________________________________________________________

[1 M]

(e) (i) Which atoms are isotopes? [1M]

Atom manakah isotope?

_______________________________________________________________

[1 M]

(ii) Explain your answer in (e)(i). [1M]

____________________________________________________________[1 M]

(iii) State one use of the isotope in (e)(i) which is radioactive. [1M]

_____________________________________________________________________

[1 M]

~END OF QUESTIONS PAPER~

Prepared by; Checked by; Approved by;

____________________ __________________ _____________________

En Mohd Ridzuan Puan Rozita Puan Suzana

Chemistry Teacher Head of Chemistry Panel Head of Science & MathDepartment

SMK Ambrose SMK Ambrose SMK Ambrose

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