peperiksaan setengah tahun paper 2 daerah segamat 2010

7/28/2019 Peperiksaan Setengah Tahun Paper 2 Daerah Segamat 2010

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4541/2

Chemistry

Paper 2 NAMA:.................................................... Tingkatan :..............................MEI

2010

2 jam

UNIT PEPERIKSAAN DAN PENILAIANPEJABAT PELAJARAN DAERAH SEGAMAT

PEPERIKSAAN PERTENGAHAN TAHUN SETARA DAERAH

CHEMISTRY

FORM 5

Paper 2

Dua jam tiga puluh minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU1. Tuliskan nama dan tingkatan pada ruang

yang disediakan.2. Jawab semua soalan daripadaBahagian A.

Tuliskan jawapan anda dalam ruang yang

disediakan

3. Jawab satu soalan daripadaBahagian B

dan satu soalan daripadaBahagian

C.Jawapan kepada bahagian B dan

Bahagian Chendaklah ditulis pada kertastulis.

4. Anda diminta menjawab dengan lebih

terperinci untuk Bahagian B dan Bahagian

C. Jawapan mestilah jelas dan logik.

Persamaan, gambar rajah, jadual, graf dan

cara lain yang sesuai untuk menjelaskanjawapan anda boleh digunakan.

5. Anda hendaklah menyerahkan kertas tulisdan kertas tambahan, jika digunakan

bersama-sama dengan kertas soalan.

6. Penggunaan kalkulator saintifik yang tidak

boleh diprogramkan adalah dibenarkan.

Kertas soalan ini mengandungi 14 halaman bercetak

Bahagian Soalan Markah

penuh

Markah

diperoleh

A

1 10

2 10

3 10

4 10

5 10

6 10

B 7 20

8 20

C

9 20

10 20

Jumlah


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[lihat sebelah

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Section A[60 marks]

Answerall questions in this section.The time suggested to complete Section A is 90 minutes.

1. The figure shows the graph of temperature against time for the heating of solid naphthalene.Rajah dibawah menunjukkan graf suhu melawan masa bagi pemanasan pepejal naftalena.

Temperature/ oC

Z

T2X Y

W

0

(a) What is the physical state of naphthalene at the region: Apakah keadaan fizikal bagi naftalena pada kawasan:

XY : ...........................................................................................................................................

YZ : ...........................................................................................................................................[2 marks]

(b) Draw the arrangement of particles at the region WX.

Lukiskan susunan zarah pada kawasan WX.

[1 mark](c) T2 is the melting point of naphthalene.

T2Adalah takat lebur bagi naftalena.

Explain why there is no change in temperature from X to Y. Terangkan mengapa tiada perubahan suhu dari X ke Y.

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

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

[2 marks]

[TURN OVERCONFIDENTIAL

1

Time/min


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(d) At which point has naphthalene completed the process of melting? Pada titik manakah naftalena telah lengkap proses peleburan?

.........................................................................................................................................................[1 mark]

(e) The liquid naphthalene is cooled at room temperature. Predict the freezing point ofnaphthalene.Cecair naftalena disejukkan pada suhu bilik. Ramalkan takat beku bagi naftalena.

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

[1 mark](f) Draw the set up of the apparatus used to determine the melting point of naphthalene in the

laboratory.Lukiskan susunan radas yang digunakan bagi menentukan takat lebur bagi naftalena dalammakmal.

[2 marks]

2. The figure shows part of the Periodic Table of the elements.

Q,R,T,X and Y do not represent the actual symbol of the elements. Rajah dibawah menunjukkan Jadual Berkala unsur.

Q, R, T, X and Y tidak mewakili simbol sebenar unsur-unsur.

Q R

T X Y

(a) By using the letters as a symbol, answer the following questions.Dengan menggunakan huruf sebagai symbol, jawab soalan yang berikut.

(i) Choose the element that is a halogen.Pilih unsur yang mana adalah halogen.

[1 mark]


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(ii) Which element is monoatomic?Unsur yang manakah adalah monoatom?

......................................................[1 mark]

(iii) Which element forms an amphoteric oxide?

Unsur yang manakah menghasilkan oksida amforterik?

......................................................[1 mark]

(iv) Which element reacts vigorously in water to form alkaline solution?

Unsur yang manakah bertindakbalas dengan cergas dalam air membentuk larutan beralkali?

[1 mark]

(b) Write the electron arrangement for an atom of element Q.Tuliskan susunan elektron bagi atom bagi unsur Q.

......................................................[1 mark]

(c) T reacts with Y to form a compound. T bertindakbalas dengan Y untuk membentuk sebatian.

(i) What is the type of the compound formed?Apakah jenis sebatian yang terbentuk?

.. [1 mark]

(ii) Draw the diagram of electron arrangement for the compound formed.

Lukiskan rajah susunan electron bagi sebatian yang terbentuk.

[2 marks]

(iii) State two physical properties of the compound formed.

Nyatakan dua sifat-sifat fizikal bagi sebatian yang terbentuk.

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

...................................................................................................................................................[2 marks]


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3. The figure shows the set up of apparatus for the electrolysis of copper(II) sulphate solution.Rajah dibawah menunjukkan susunan radas bagi elektrolisis larutan kuprum(II) sulfat.

X Y

(a) State the energy change that occurs in the electrolysis process.Nyatakan perubahan tenaga tang berlaku dalam proses elektrolisis.

...........................................................................................................................................................[1 mark]

(b) Write the formulae of all the cations present in the copper(II) sulphate solution.

Tuliskan formula semua kation yang terdapat dalam larutan kuprum (II) sulfat.

.[2 marks]

(c) (i) Name the products formed at electrode Y. Namakan hasil yang terbentuk di elektrod Y.

[1 mark](ii) Write the half equation for the reactions occur in (c)(i).

Tuliskan persamaan separa bagi tindakbalas yang berlaku dalam c(ii).

..

[1 mark](d) Predict the colour change to the solution during electrolysis . Explain your answer.

Ramalkan perubahan warna pada laruatn semasa elektrolisis. Terangkan jawapan anda.

.

.[2 marks]

(d) An impure copper is to be made pure through electrolysis.Kuprum yang tak tulen boleh ditulenkan melalu elektrolisis.Name the substances used as:Namakan bahan yang digunakan sebagai:

(i) Electrode X /elekrod X: .(ii) Electrode Y /elektrod Y:.. ...

[2 marks]

(f) State two industrial application of electrolysis beside purification.Nyatakan dua aplikasi elektrolisis dalam industri selain penulenan.

[2 marks]


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copper (II)sulphatesolution

carbon

electrodes


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4. The flow chart shows part of the Haber Process in the manufacture of ammonia in industry. Carta alir menunjukkan Proses haber dalam pembuatan ammonia dalam industri.

(a) Nitrogen react with gas P to form ammonia.Nitrogen bertindakbalas dengan gas P untuk menghasilkan ammonia.

(i) What is gas P?

Apakah gas P?

..............................................................................................................................................[1 mark]

(ii) Describe a chemical test to identify gas P.Terangkan ujian kimia bagi mengenalpasti gas P.

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

..............................................................................................................................................[2 marks]

(iii) Write a chemical equation for the reaction occurs.

Tuliskan persamaan kimia bagi tindakbalas yang berlaku.

.............................................................................................................................................[2 marks]

(b) A catalyst is used in Haber Process to speed up the production of ammonia.Name the catalyst.Mangkin digunakan dalam proses Haber bagi mempercepatkan penghasilan ammonia.Namakan mangkin yang digunakan.

.......................................................................................................................................................[1 mark]

(c) When ammonia reacts with acid Z, ammonium sulphate is formed.Apabila ammonia bertindakbalas dengan asid Z, ammonium sulfat terhasil.

(i) Name acid Z.Namakan asid Z.

...................................................................................................................................................[1 mark]


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Nitrogen

Gas P

ammoniaAmmoniumsulphate


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(ii) Calculate the percentage of nitrogen in ammonium sulphate.[Given that relative atomis mass of H = 1, N = 14, O = 16, S = 32]

Kirakan peratus nitrogen dalam ammonium sulfat.

[3 marks]

5. The flow chart shows the preparation of different types of salts. Carta alir menunjukkan penyediaan beberapa jenis garam yang berbeza.

+ water

(a) Name one example each of salt A and salt B. Namakan satu contoh garam A dan garam B.

A : ...............................................................................................................................................

B : ................................................................................................................................................[2 marks]

(b) Give one method to prepare salt B stated in (a). Berikan satu kaedah untuk menyediakan garam B yang dinyatakan dalam (a)

........................................................................................................................................................[2 marks]

(c) (i) Name an example of an insoluble salt. Namakan satu contoh garan tidak larut dalam air.

..................................................................................................................................................[1 mark]


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Salts

Soluble in water Insoluble in water

A B

Preparationthrough titration

Other method ofpreparation

Preparation by doubledecomposition

reaction


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(ii) What is the substances used to prepare a salt in c(i). Apakah bahan yang digunakan untuk menyediakan garam dalan c(i).

..................................................................................................................................................[2 marks]

(iii) Describe how you would obtain dry crystals of the salt mentioned in c(i) through thisreaction.

Jelaskan bagaimana anda dapat mengasilkan hbur kering bagi garam yang dinyatakandalam c(i) melalui tindakbalas ini.

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

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

..................................................................................................................................................[3 marks]

6. The figure shows the conversion of ethanol to ethene and methyl ethanoate.Rajah menunjukkan pertukaran etanol kepada etena dan metiletanoat.

(a) (i) Name Process I which converts ethanol to ethene. Namakan proses I yang menukar etanol kepada etena.

.......................................................................................................................................................[1 mark]

(ii) Draw a labelled diagram to show Process I in the laboratory.Lukiskan gambarajah berlabel bagi menunjukkan proses I dalam makmal.

[2 marks]

(b) (i) Ethene reacts with bromine through addition reaction.Etena bertindakbalas dengan bromin melalui tindakbalas penambahan.

State the changes in the colour of bromine during this reaction. Nyatakan perubahan warna bromin semasa tidakbalas berlaku.

......................................................................................................................................................... [1 mark]


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Ethene Ethyl ethanoateEthanol Process IIProcess I


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(ii) Draw the structural formula for the molecule produced when ethene reacts with bromine. Lukiskan formula struktur bagi molekul yang dihasilkan pabila etena bertindakbalas

denganbromin.

[1 mark](c) Ethene can also be converted to ethanol through addition reaction.

Etena juga boleh ditukar kepada etanol melalui tindakbalas penambahan.

(i) What is the temperature and pressure needed for the reaction. Apakah suhu dan tekanan yang diperlukan bagi tindalbalas ini.

Temperature/suhu : oC Pressure/tekanan : .atm

[2 marks]

(d) (i) Name a substance that reacts with ethanol to produce ethyl ethanoate in Process II.Namakan bahan yang bertindakbalas dengan etanol bagi menghasilkan etil etanoat dalamProses II.

........................................................................................................................................................[1 mark]

(ii) What is the molecular formula of ethyl ethanoate. Apakah formula molekul bagi etil etanoat.

........................................................................................................................................................[1 mark]

(ii) State one physical property of ethyl ethanoate.Nyatakan satu sifat fizik nagi etil etanoat.

.......................................................................................................................................................[1 mark]


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Section B[20 marks]

The time suggested to answer this section is 30 minutes.

7. (a) The figure show two isotopes of an element X.Rajah menunjukkan dua isotop bagi unsur X.

35 37X X

17 17

(i) State the number of neutrons in both atoms.Nyatakan bilangan neutron nagi kedua-dua atom.

[2 marks]

(ii) State two similarities and two differences between these two atoms.Nyatakan dua persamaan dan dua perbezaan bagi kedua-dua atom.

[4 marks]

(b) The figure shows the set up of apparatus for an experiment to determine the empirical formula of

the oxide of metal Y.Rajah menunjukkan susunan radas bagi eksperimen untuk menentukan formula empirik bagi

oksida Logam Y.

The results obtained are as follows.Keputusan yang diperolehi adalah seperti berikut.

Mass of combustion tube + porcelain dish = 53.30 g Jisim tiub pembakaran + piring porcelain

Mass of combustion tube + porcelain dish + oxide of metal Y = 55.69 g Jisim tiub pembakaran + piring porcelain + oksida logam Y

Mass of combustion tube + porcelain dish + residue = 55.37 g Jisim tiub pembakaran + piring porcelain + baki

(i) Based on the above information, determine the empirical formula of oxide of metal Y.Berdasarkan maklumat diatas, tentukan fprmula empirik bagi oksida logam Y.[Given that the relative atomic mass of O = 16, Y = 207]

[4 marks]

(ii) Describe the steps that should be taken to ensure that all the air in the combustion tube hasbeen expelled.Jelaskan langkah-langkah yang perlu diambil bagi memastikan semua uara dalam tiub

pembakaran telah dikeluakan.


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hydrogen flame

dry hydrogen

oxide of metal Y

combustion tube


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[2 marks]

(iii) The table shows the metals and the method used to determine the empirical formulae of themetal oxides respectively.Jadual menunjukkan logam dan kaedah yang digunakan bagi menentukan formula empirikbagi oksida logam masing-masing.

Metal/logam Method/kaedah

Metal Y/logam YDry hydrogen gas is flowed through the hot metal oxide.Gas hidrogen kering dialirkan lelalui oksida logam panas

MagnesiumMagnesium is burnt in the air.

Magnesium tebakar dalam udara.

Explain why there are different methods used. Terangkan mengapa terdapat kaedah yang berbeza yang digunakan.

[2 marks]

(c) X is a substance which melts at 71oC and boils at 314oC.X adalah bahan yang melebur pada 71oC dan mendidih pada 314oC.

(i) Sketch a graph of temperature against time when molten X at 100oC is allowed to cool to60oC

(ii) Lakarkan graf bagi suhu melawan masa apabila leburan X pada 100oC disejukkan ke60oC

100

60

(ii) Based on the graph in (c)(i), state the physical state of substance X at 71oC and explain the

changes in terms of the kinetic energy and the arrangement of particles. Berdasarkan kepada graf dalam (c)(i) nyatakan sifat fozikal bagi bajan X pada dan jelaskan

perubahan dari segi tenaga kinetik dan susunan zarah-zarah.[6 marks]


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Temperature / oC

Time /min


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8. The table shows the proton number of three elements. Jadual menunjukkan nombor proton bagi tiga unsur.

Element Proton Number A 6

X 8

Y 11

(a) Element Y reacts with element X to form a compound.Unsur Y bertindakbalas dengan unsur X untuk membentuk sebatian.

(i) Write the formula of the compound formed.Tuliskan formula bagi sebatian yang terbentuk.

[1 mark]

(ii) Name the chemical bond formed in a(i)Namakan ikatan kimia yang terbentuk dalan a(i).

[1 mark]

(iii) Draw the electronic arrangement of a compound formed between element Y and X.Lukiskan susunan elektron bagi sebatian yang terbentuk antara unsur Y dan unsur X.

[2 marks]

(b) (i) Element X also can react with element A to form a compound. Explain in terms of electronarrangement how the compound is formed.Unsur X juga boleh bertindakbalas dengan unsur A bagi membentuk sebatian. Jelaskandalam kontek susunan elektron bagaimana sebatian ini terbentuk.

[8 marks]

(ii) Predict the melting point of the compound formed in b(i). Explain your answer. Ramalkan takat lebur bagi sebatian yang terbentuk dalam b(i). Jelaskan jawapan anda.

[3 marks]

(c) The compound formed between element Y and X has different electrical conductivity comparedto compound formed between element X and A. Explain the statement.Sebatian yang terbentuk antara unsur Y dan unsur X mempunyai kekonduksian eektrik yangberbeza berbanding sebatian yang terbentuk antara unsur X dan A. Terangkan pernyataan ini.

[5 marks]

SECTION C

[20 marks]The time suggested to answer this section is 30 minutes.

9. (a) A catalyst is a substance which causes a change in the rate of reaction without itself undergoing achemical change at the end of reaction.

Mangkin adalah bahan yang menyebabkan perubahan dalan kadar tindakbalas tanpa ia nyasendiri mengalami perubahan kimia diakhir tindakbalas.

(i) State an example of chemical reaction and the suitable catalyst.


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Nyatakan satu contoh tindakbalas kimia dan mangkin yang sesuai.[2 marks]

(ii) Referring to the collision theory, explain how the catalyst increases the rate of reaction.

Dengan merujuk kepada teori pelanggaran, Terangkan bagaimana mangkin meningkatkankadar tindakbalas.

[4 marks]

(iii) State two characteristics of catalyst. Nyatakan dua ciri mangkin.

[2 marks]

(b) You are provided with the folowing apparatus and materials :Andadibekalkan dengan radas dan bahan yang berikut:

Hydrogen peroxide solution, manganese(IV) oxide powder, test tube and woodensplinter.Larutan hidrogen peroksida, serbuk mangan (VI) oksida, tabung uji dan kayu uji

By using the apparatus and materials provided, describe an experiment to determine the effect ofcatalyst on the rate of reaction.

Dengan menggunakan radas dan bahan yang dibekalkan, Terangkan satu eksperimen untukmenentukan kesan mangkin keatas kadar tindakbalas.

Your description should include the following aspects:Penerangam anda mesti meliputi aspek yang berkut:

Procedure /prosedur

Diagram/ rajah

Observation /pemerhatian

Chemical equation /persamaan kimia

Conclusion / kesimpulan[12 marks]

10. A and B are strong acid and strong alkali respectively. A dan B adalah asid kuat dan asid lemah masing-masing.

(a) By using a suitable example, explain what is meant by strong acid and strong alkali.Dengan menggunakan contoh yang sesuai, terangkan apakah yang dimaksudkan dengan asidkuat dan asid lemah.

[6 marks]

(c) Without using indicators, describe how you can carry out two tests to show that A is an acid andB is an alkali.Tanpa menggunakan penunjuk, jelaskan bagaimana anda dapat menjalankan dua ujian bagimenunjukkan bahawa A adalah asid dan B adalah alkali.

[8 marks]

(d) Name a scale that can be used to differentiate acids and alkalis. Explain the acidity and alkalinitybased on the scale.


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Namakan skala yang boleh digunakan bagi membezakan antata asid dan alkali. Terangkankeasidan dan kealkalian berdasarkan skala tersebut.

[6 marks]

END OF QUESTION PAPER


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peperiksaan setengah tahun paper 2 daerah segamat 2010

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