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
Diagram 1 3. Diagram 1 shows the particles arrangement of a substance at room temperature. This arrangement of particles can be found in Rajah 1 menunjukkan susunan zarah bahan pada suhu bilik. Susunan zarah ini dapat dilihat dalam A carbon B copper C oxygen D water
2. Which substance is an element? Yang manakah bahan yang merupakan unsur? A Air Udara B Stim Wap C Carbon Karbon D Naphthalene Naphtalena
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 Respirasi D Neutralization (peneutralan) 1
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A B C D
melting boiling freezing condensation
Diagram 2 5. Diagram 2 shows the apparatus set - up to investigate Process X. What is Process X? Rajah 2 menunjukkan susunan radas untuk menyiasat proses X. apakah proses X? A Diffusion B Condensation C Evaporation D Sublimation
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 —> steam D 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 ⁰C dan 5 ⁰C. keadaan fizikal bagi bahan M pada suhu bilik ialah A gas B liquid C solid D gas and liquid
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? 2
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Substance Melting point W -187 ⁰C X -78 ⁰C Y 75 ⁰C Z 114 ⁰C Table 1
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 is surrounded by electrons that move in certain shells. Atom mengandungi nukleus yang dikelilingi oleh elektron yang bergerak dalm petala.
Boiling point -126 ⁰C 70 ⁰C 130 ⁰C 444 ⁰C
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 berikut cecair pada suhu bilik. A W B X C Y D Z Substance Melting point P -59 ⁰C Q 48 ⁰C R -110 ⁰C S 128 ⁰C Table 2
Boiling point 60 ⁰C 130 ⁰C -70 ⁰C 470 ⁰C
11. Which of the following scientists discovered proton? Yang manakah antara saintis berikut yang menjumpai proton? A Neils Bohr B J. J Thomson C James Chadwick D Ernest Rutherford
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 room temperature? Rajh 2 menunjukkan takat didih dan takat lebur bagi bahan P, Q, R, dan S. Yang manakah antara bahan berikut mempunyai tenaga kinetik paling tinggi pada suhu bilik? A P B Q C R D S
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. 3
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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.
Number 23 refers to Nombor 23 merujuk sebagai A nucleon number B 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.
14. Diagram 5 shows a model of an atom.
• •
Which of the following symbol represents the atom Y? Yang manakah simbol berikut mewakili atom Y?
Diagram 5 Who introduced this model? Siapakah yang memperkenalkan model ini? A Neils Bohr B John Dalton C 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 neutrons D both protons and electrons
16. Diagram 6 shows representation of an atom
the
Electron arrangement 2.8.3 Number of neutrons 14
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
atomic
Diagram 6
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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-60 B Carbon-14 C Iodine-131 D 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?
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 ⁰C (v)
90 ⁰C
Explain why the temperature remains constant from point B to point C? Terangkan kenapa suhu kekal sama dari titik B ke titik C?
(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
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 P Q R S
Proton number 6 6 11 12
Nucleon number 12 14 24 24 Table 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 of AzX [1M] Tulis symbol atom Q dalam bentuk AzX.
(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.
(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; ____________________ En Mohd Ridzuan Chemistry Teacher Department SMK Ambrose
Checked by; __________________ Puan Rozita Head of Chemistry Panel SMK Ambrose
Approved by; _____________________ Puan Suzana Head of Science & Math SMK Ambrose
