NAMA:___________________________TINGKATAN :_________________

SMK MUNSHI ABDULLAH, SG. AIR TAWARSABAK BERNAM SELANGOR

PEPERIKSAAN PERTENGAHAN TAHUN 20124541/2

CHEMISTRY FORM 5Kertas 2Mei2 1/2 jamDua jam tiga puluh minitJANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

1Tuliskan nama dan tingkatan pada ruang yang disediakan.2. Kertas soalan ini adalah dwibahasa.3. Calon dibenarkan menjawab keseluruhan atau sebahagian soalan sama ada dalam bahasa Inggeris atau bahasa Melayu.INFORMATION FOR CANDIDATESMAKLUMAT UNTUK CALON1 This question paper consists of three sections. Section A, Section B and Section C.Kertas soalan ini mengandungi tiga bahagian Bahagian A, Bahagian B dan Bahagian C.2. You are advise to spend 90 minutes to answer questions in Section A, 30 minutes for Section B and 30 minutes for Section C.Anda dinasihat supaya mengambil masa 90 minit untuk menjawab soalan Bahagian A, 30 minit untuk Bahagian B dan 30 minit untuk Bahagian C.Untuk Kegunaan Pemeriksa

BahagianSoalanMarkah PenuhMarkah Diperoleh

A110

211

310

49

510

610

B720

820

C920

1020

Jumlah

1. (a) What is the meaning of empirical formula? Apakah maksud formula empirik?

________________________________________________________________________[ 1 mark ](b) Diagram 1.1 shows an incomplete equation which is one of the steps involved in determining the empirical formula.Complete this equation.Rajah 1.1 menunjukkan persamaan tak lengkap yang merupakan satu daripada langkah dalam menentukan formula empirik.Lengkapkan persamaan itu.

Mass /Jisim___________________________________ = _______________________________Relative atomic mass/Jisim atom relatif

Diagram 1.1/ Rajah 1.1[ 1 mark ]

(c) Diagram 1.2 shows the apparatus set-up for two methods used to determine the empirical formula of two compounds.Rajah 1.2 menunjukkan susunan radas bagi dua kaedah yang digunakan untuk menentukan formula empiric bagi dua sebatian.

(i) Which is suitable to be used to determine the empirical formula of magnesium oxide?Kaedah yang manakah sesuai digunakan untuk menentukan formula empiric bagi magnesium oksida?

_______________________________________________________________[ 1 mark ](ii) Why did you choose the method in 3(c)(i)?Mengapakah anda memilih kaedah di 3(c)(i)?

_______________________________________________________________[ 1 mark ](iii) When carrying out an experiment using Method I, why does crucible lid need to be opened once a while?Semasa menjalankan eksperimen menggunakan Kaedah I, mengapakah penutup mangkuk pijar dibuka sekali sekala?

_______________________________________________________________[ 1 mark ](d) Diagram 1.3 shows the result for an experiment to determine the empirical formula of lead oxide.Rajah 1.3 menunjukkan keputusan bagi satu eksperimen untuk menentukan formula empirik bagi plumbum oksida.

Mass of combustion tube= 64.00 gJisim tiub pembakaranMass of combustion tube + lead oxide= 117.52 gJisim tiub pembakaran + plumbum oksidaMass of combustion tube + lead= 113.68 gJisim tiub pembakaran + plumbum

Diagram 1.3/Rajah 1.3

Based on Diagram 1.3, determine the values of the following:Berdasarkan Rajah 1.3, tentukan nilai yang berikut:[Relative atomic mass: O = 16, Pb = 207]

(i) Mass of lead / Jisim plumbum

=_________________________g[ 1 mark ]

(ii) Number of moles of lead/Bilangan mol plumbum

=_________________________mol[ 1 mark ]

(iii) Mass of oxygen/ Jisim oksigen

=_________________________g[ 1 mark ]

(iv) Number of moles of oxygen/ Bilangan mol oksigen=________________________mol[ 1 mark ]

(v) Empirical formula of lead oxide/ Formula empiric bagi plumbum oksida

=________________________[ 1 mark ]

2. Diagram 2 shows a part of the Periodic Table of Elements. The symbols P, Q, R, S and T do not represent the actual symbols of the elements.Rajah 2 menunjukkan sebahagian daripada Jadual Berkala Unsur. Simbol P, Q, R, S dan T yang ditunjukkan tidak mewakili simbol sebenar unsur-unsur tersebut.

Diagram 2/ Rajah 2

(a) (i) State the electron arrangement of element R?Nyatakan susunan elektron bagi unsur R?

_________________________________________________________________[ 1 mark ](ii) Explain why element R and element S are in the same period.Terangkan mengapa unsure R dan unsur S berada dalam kala yang sama.__________________________________________________________________[ 1 mark ](b) (i) Which element is chemically unreactive?Unsur manakah yang tidak reaktif secara kimia?

__________________________________________________________________[ 1 mark ] (ii) Explain your answer in (b) (i).Terangkan jawapan anda di (b) (i).

__________________________________________________________________[ 1 mark ](c) (i) Compare the atomic size of R and S.Bandingkan saiz atom bagi R dan S.

__________________________________________________________________[ 1 mark ]

(ii) Explain your answer in (c) (i).Terangkan jawapan anda di (c) (i).

__________________________________________________________________

__________________________________________________________________[ 2 marks ](d) Element R react with element Q to form a compound.Write a chemical equation for the reaction.Unsur R bertindak balas dengan unsur Q untuk membentuk satu sebatian.Tuliskan persamaan kimia bagi tindak balas tersebut.

_____________________________________________________________________[ 2 marks ](e) Element P reacts with Q to form a compound. Draw the electron arrangement of the compound formed between element P and element Q.Unsur P bertindak balas dengan Q membentuk satu sebatian. Lukiskan susunan electron bagi sebatian yang terbentuk antara unasur P dan unsur Q.

[ 2 marks ]3. Diagram 3 shows two cells R and S.Rajah 3 menunjukkan binaan sel R dan S.

Diagram 3/ Rajah 3

(a) Based on cell R in the diagram 3, answer the following questions.Berdasarkan sel R dalam Rajah 3 , jawab soalan-soalan berikut.

(i) State the energy change in cell R.Nyatakan perubahan tenaga yang berlaku bagi sel R.

_______________________________________________________________[ 1 mark ](ii) Write the formulae of all the ions present in copper(II) sulphate solution.Tulis semua formula ion yang hadir dalam larutan kuprum(II) sulfat.

_______________________________________________________________[ 1 mark ](iii) Write the half equation for the reaction that occurs at the anode of cell R.Tuliskan setengah persamaan bagi tindak balas yang berlaku di anod sel R.

_______________________________________________________________[ 1 mark ](iv) State one observation that occurs at the anode of cell R.Nyatakan satu pemerhatian bagi tindak balas yang berlaku di anod sel R.

_______________________________________________________________[ 1 mark ](b) Based on cell S in diagram 3, answer the following questions.Berdasarkan sel S dalam Rajah 3, jawab soalan-soalan berikut.

(i) Show the direction of electrons flow in the circuit of cell S in diagram 3.Tunjukkan arah pengaliran electron dalam litar sel S dalam Rajah 3.

_______________________________________________________________[ 1 mark ](ii) Write overall ionic equation for the reaction.Tuliskan persamaan ion keseluruhan bagi tindak balas ini.

_______________________________________________________________[ 1 mark ](iii) What is the changes that will happen to the reading of the voltmeter if the zinc plate is placed with magnesium plate?Explain your answer.Apakah perubahan yang berlaku pada bacaan voltmeter sekiranya kepingan zink digantikan dengan kepingan magnesium?Jelaskan jawapan anda.

_______________________________________________________________

______________________________________________________________[ 2 marks ](iv) State two differences between cell R and cell S.Nyatakan dua perbezaan antara sel R dan sel S.Cell R/ Sel RCell S/ Sel S

[ 2 marks ]4. Diagram 4 shows the arrangement of atoms in two types of copper alloy.Rajah 4 menunjukkan susunan atom dalam dua jenis aloi bagi kuprum.

Diagram 4/ Rajah 4

(a) State the meaning of alloy.Nyatakan maksud aloi.

_____________________________________________________________________[ 1 mark ](b) State the name of alloy X.Nyatakan nama bagi aloi X.

_____________________________________________________________________[ 1 mark ]

(c) State the name of atom M.Nyatakan nama bagi atom M.

_____________________________________________________________________[ 1 mark ](d) (i) What is the difference in terms of hardness between bronze and pure copper?Apakah perbezaan daripada segi kekerasan antara gangsa dengan kuprum tulen?

__________________________________________________________________[ 1 mark ](ii) Complete Table 1 to show the differences in terms of size and arrangement of atoms in bronze and pure copper.Lengkapkan Jadual 1 untuk menunjukkan perbezaan daripada segi saiz dan susunan atom dalam gangsa dengan kuprum tulen.Difference/ PerbezaanBronze / GangsaPure copper/ Kuprum tulen

Size of atoms/ Saiz atom

Arrangement of atoms/ susunan atom

[ 2 marks ](iii) Describe what happens to the atoms when a force is applied to a bronze and pure copper.Huraikan apa yang akan berlaku kepada atom-atom apabila satu daya dikenakan kepada gangsa dan kuprum tulen.

Bronze/ gangsa:

_________________________________________________________________________

_________________________________________________________________________

Pure copper/ kuprum tulen:

_________________________________________________________________________

_________________________________________________________________________[ 2 marks ]

(e) Pewter is also an example of an alloy.State one use of pewter.Pewter juga adalah satu contoh bagi aloi.Nyatakan satu kegunaan pewter.

_____________________________________________________________________

_____________________________________________________________________[ 1 mark ]5. Diagram 5.1 shows the set-up of apparatus of an experiment to investigate the effect of size of reactant on the rate of reaction.Rajah 5.1 menunjukkan susunan radas bagi eksperimen yang mengkaji kesan saiz bahan terhadap kadar tindak balas.

Diagram 5.1/ Rajah 5.1

(a) Write a chemical equation for the reaction in Diagram 5.1.Tulis persamaan kimia bagi tindak balas yang ditunjukkan dalam Rajah 5.1.

_____________________________________________________________________[ 2 mark ]

A graph of the volume of hydrogen gas produce against time is drawn as show in Diagram 5.2.Graf isipadu gas hidrogen yang terhasil melawan masa ditunjukkan seperti di dalam Rajah 5.2.

Diagram 5.2/ Rajah 5.2

(b) Based on the graph, calculate:Berdasarkan graf, hitung:

(i) The average rate of reaction for the first minute.Purata kadar tindak balas bagi minit yang pertama.

[ 1 mark ](ii) The rate of reaction at 90 seconds.Kadar tindak balas pada masa 90 saat.

[ 2 marks ](c) Experiment II is carried out by replacing sulphuric acid with hydrochloric acid of the same volume and concentration.Eksperimen II dijalankan dengan menggantikan asid sulfuric dengan asid hidroklorik pada kepekatan yang sama.

(i) Sketch the graph for reaction between magnesium ribbon and hydrochloric acid in Diagram 5.2.Lakarkan graf bagi tindak balas antara pita magnesium dengan asid hidroklorik pada Rajah 5.2.[ 2 marks ]

(ii) Based on the collision theory, explain how the concentration of hydrochloric acid in experiment II affects the rate of reaction.Berdasarkan teori pelanggaran, terangkan bagaimana kepekatan asid hidroklorik mempengaruhi kadar tindak balas dalam eksperimen II.

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________[ 3 marks ]6. The following information is about the compound C2H5OH.Maklumat berikut adalah mengenai sebatian C2H5OH.

Miscible in all proportions with waterLarut campur dalam air pada sebarang perkadaranUndergoes combustionMengalami pembakaranA member of a homologous seriesAhli suatu siri homolog

(a) What is the name of this compound/Apakah nama bagi sebatian ini?

_____________________________________________________________________[ 1 mark ](b) What is the general formula for the homologous series of this compound?Apakah formula am bagi siri homolog sebatian ini?

_____________________________________________________________________[ 1 mark ](c) One mole of this compound undergoes complete combustion to form gas X and water as shown below.Satu mol sebatian ini mengalami pembakaran lengkap untuk menghasilkan gas X dan air seperti ditunjukkan di bawah.

C2H5OH + mO2 nX + 3H2O

(i) State the name of gas X.Nyatakan nama gas X.

_______________________________________________________________[ 1 mark ](ii) What are the values of m and n ?Apakah nilai bagi m dan n?

m =___________________________________________________________

n =____________________________________________________________[ 2 marks ]

(d) Compound C2H5OH reacts with ethanoic acid to produce compound Y which has sweet pleasant smell.Sebatian C2H5OH bertindak balas dengan asid etanoik untuk menghasilkan sebatian Y yang berbau wangi.

(i) State the name of compound Y.Nyatakan nama sebatian Y.

_______________________________________________________________[ 1 mark ](ii) Draw the structural formula of compound Y.Lukis formula struktur bagi sebatian Y.

[ 1 mark ](e) Compound C2H5OH undergoes dehydration to produce ethane.Sebatian C2H5OH mengalami pendehidratan untuk menghasilkan etena.

(i) Suggest one dehydrating agent for this reaction.Cadangkan satu agen pendehidratan bagi tindak balas ini.

_______________________________________________________________[ 1 mark ]

(ii) Draw an apparatus set-up this dehydration reaction to collect ehtene.Lukis susunan radas untuk tindak balas pendehidratan ini untuk mengumpul etena.

[ 2 marks ]Section BBahagian B

[ 20 marks ] Answer any one questionJawab mana-mana satu soalan.

7. Diagram 7.1 and Diagram 7.2 show the diagrams of electron arrangement for atoms of two elements from Group 17 in the Periodic Table of Elements.Rajah 7.1 dan Rajah 7.2 menunjukkan rajah susunan electron bagi atom dua unsur dari Kumpulan 17 dalam Jadual Berkala Unsur.

Diagram 7.1/ Rajah 7.1Diagram 7.2/ Rajah 7.2

(a) Based on Diagram 7.1:Berdasarkan Rajah 7.1:

(i) Write the electron arrangement for the atom of the element and name the element.Tulis susunan elektron bagi atom unsur itu dan namakan unsur itu.[ 2 marks ](ii) Write a chemical equation for the reaction between this element and sodium hydroxide.Tulis persamaan kimia bagi tindak balas antara unsur itu dengan natrium hidroksida.[ 3 marks ](b) Compare the attractive forces between the nuclei and the valence electrons in the atoms in Diagram 7.1 and Diagram 7.2 and relate this to their respective reactivity.Bandingkan daya tarikan antara nucleus dengan elektron valens dalam atom pada Rajah 7.1 dan Rajah 7.2 dan kaitkan dengan kereaktifan masing-masing.[ 6 marks ](c) Another element in Group 17 is a black coloured solid.Predict the reactivity of this element in its reaction with sodium hydroxide compared to that of the element in Diagram 7.2.Satu unsur lain dalam Kumpulan 17 adalah pepejal yang berwarna hitam.Ramalkan kereaktifan unsur itu dalam tindak balasnya dengan natrium hidroksida berbanding dengan unsur dalam Rajah 7.2.[ 1 mark ](d) Diagram 7.3 shows the set up of the apparatus to investigate the reaction of an element from Group 17 with iron metal.Rajah 7.3 menunjukkan susunan radas bagi satu eksperimen untuk mengkaji tindak balas satu unsur dari Kumpulan 17 dengan logam ferum.

Diagram 7.3/ Rajah 7.3

(i) State two precautions that must be taken while carrying out the experiment.Nyatakan dua langkah keselamatan yang perlu diambil semasa menjalankan eksperimen itu.[ 2 marks ](ii) Describe and write the chemical equations for the reactions that occur in Part G and Part H.Huraikan dan tulis persamaan kimia bagi tindak balas yang berlaku di Bahagian G dan Bahagian H.[ 6 marks ]

8. (a) Food stored in a refrigerator lasts longer than food stored in a kitchen cabinet. Explain why.Makanan yang disimpan dalam peti sejuk tahan lebih lama daripada makanan yang disimpan dalam almari dapur.Terangkan mengapa.[ 4 marks ](b) A group of pupils carried out three experiments to investigate the factors affecting the rate of a reaction.Table 8 shows information about the reactants and the temperature used in each experiment.Sekumpulan murid telah menjalankan tiga eksperimen untuk mengkaji kesan faktor-faktor yang mempengaruhi kadar tindak balas.Jadual 8 menunjukkan maklumat tnetang bahan tindak balas dan suhu yang digunakan dalam setiap eksperimen.

ExperimentEksperimenReactantsBahan tindak balasTemperature/ oCSuhu/ oC

IExcess calcium carbonate chips and 30 cm3 of 0.5 mol dm-3 hydrochloric acid.Ketulan kalsium carbonate berlebihan dan 30 cm3 asid hidroklorik 0.5 mol dm-3.30

IIExcess calcium carbonate chips and 30 cm3 of 0.5 mol dm-3 hydrochloric acid.Ketulan kalsium carbonate berlebihan dan 30 cm3 asid hidroklorik 0.5 mol dm-3.40

IIIExcess calcium carbonate powder and 30 cm3 of 0.5 mol dm-3 hydrochloric acid.Serbuk kalsium carbonate berlebihan dan 30 cm3 asid hidroklorik 0.5 mol dm-3.40

Table 8/ Jadual 8 Graph 8 shows the result of these experiments.Graf 8 menunjukkan keputusan eksperimen-eksperimen ini.

Graph 8

(i) Calculate the average rate of reaction for Experiment I.Hitungkan kadar tindak balas purata bagi eksperimen I.[ 2 marks ]

(ii) Based on Table 8 and Graph 8, compare the rate of reaction between:Berdasarkan Jadual 8 dan Graf 8, bandingkan kadar tindak balas antara:

Experiment I dan Experiment IIEksperimen I dan Eksperimen II

Experiement II and Experiment IIIEksperimen II dan Experiment IIIIn each case explain the different in rate of reaction with reference to the collision theory.Bagi setiap kes terangkan perbezaan dalam kadar tindak balas dengan merujuk kepada teori perlanggaran.[ 10 marks ]

(iii) The chemical equation below shows the reaction between calcium carbonate and hydrochloric acid.Persamaan kimia di bawah menunjukkan tindak balas antara kalsium karbonat dengan asid hidroklorik.

CaCO3 + 2HCl CaCl2 + CO2 + H2O

Given that the relative atomic mass of C = 12, O = 16, Ca = 40 and molar volume of any gas is 24 dm3 mol-1 at room temperature and pressure.Diberi, jisim atom relatif bagi C = 12, O = 16, Ca = 40 dan isipadu molar sebarang gas adalah 24 dm3 mol-1 pada suhu dan tekanan bilik.

Calculate the maximum volume of carbon dioxide gas produced in Experiment II.Hitungkan isipadu maksimum gas karbon dioksida yang terhasil dalam Eksperimen II.[ 4 marks ]

Section CBahagian C

[ 20 marks ] Answer any one questionJawab mana-mana satu soalan

9. Diagram 9 shows the arrangement of particles of a compound in two different states, X and Y.Rajah 9 menunjukkan susunan zarah-zarah satu sebatian dalam dua keadaan yang berbeza, X dan Y.

Diagram 9/ Rajah 9

(a) The compound can conduct electricity in state X but cannot do so in state Y.Name one example of a compound with this property.Sebatian ini boleh mengalirkan arus elektrik dalam keadaan X dan tidak boleh mengalirkan arus elektrik dalam keadaan Y.Namakan satu contoh sebatian yang mempunyai sifat ini.[ 1 mark ](b) Write one of the half equations for the electrolyse the compound you named in 9(a).Tulis satu daripada dua setengah persamaan bagi eletrolisis sebatian yang dinamakan di 9(a).[ 3 marks ](c) Draw a labeled diagram of the apparatus that you can use to electrolyse the compound you named in 9(a).In your drawing, show by using arrows the movement of particles that accurs in the compound.Lukiskan satu rajah susunan radas berlabel yang anda dapat gunakan untuk mengelektrolisis sebatian yang dinamakan di 9(a).Dalam lukisan anda, tunjukkan anak panah pergerakan zara-zarah yang berlaku di dalam sebatian itu.[ 10 marks ](d) Describe the electrolysis process that occurs in 9(c).Huraikan proses elektrolisis yang berlaku di 9(c).[ 6 marks ]10. (a) Diagram 10 shows how compound G is formed from an alkene.Rajah 10 menunjukkan bagaimana sebatian G terbentuk daripada suatu alkena.

Diagram 10/ Rajah 10

(i) Name one alkene that has less than four carbon atoms.Draw its structure formula.Namakan satu alkena yang mempunyai kurang daripada empat atom karbon.Lukiskan formula strukturnya.[ 2 marks ](ii) Based on the answer in 10(a)(i), what is the name of compound F and compound G?Berdasarkan jawapan di 10(a)(i), apakah nama sebatian F dan sebatian G?[ 2 marks ](iii) State three chemical properties of compound F and three chemical properties of compound G.Nyatakan tiga sifat kimia bagi sebatian F dan tiga sifat kimia bagi sebatian G.[ 6 marks ](b) Alkenes, alcohols and carboxylic acids, are three different homologous series.Construct a table to show the general formula, the functional group and the name of a member in each of the series.Alkena, alkohol dan asid karboksilik adalah tiga siri homolog yang berbeza.Bina satu jadual untuk menunjukkan formula am, kumpulan berfungsi dan nama bagi satu ahli dalam setiap siri homolog itu.[ 10 marks ]

END OF QUESTION PAPERKERTAS SOALAN TAMAT

PPT 2012 CHEMISTRY (PAPER 2)1SULIT