soalan pppa kimia k2 2014 (set 1)

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Page 1: Soalan Pppa Kimia k2 2014 (Set 1)

7

Li 3

23

Na 11

39

K 19

1. Diagram 1.1 shows the standard representation for the atoms three elements lithium, sodium and potassium.

Rajah 1.1 menunjukkan perwakilan piawai bagi atom bagi tiga unsur litium, natrium dan kalium.

DIAGRAM [RAJAH] 1.1

(a) (i) What is meant by nucleon number of an element? Apakah yang dimaksudkan dengan nombor nukleon suatu unsur? .............................................................................................................................................

[1 mark](ii) What is the nucleon number of Lithium atom?

Apakah nombor nukleon atom Lithium?

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

[1 mark](iii) Write the electron arrangement for :

Tuliskan susunan elektron bagi :

Lithium atom/atom Lithium :......................................................................................... Sodium ion/ion Natrium :...............................................................................................

[2 marks]

(iv) Compare the size of the lithium and sodium atom . Explain your answer Bandingkan saiz atom litium dengan atom natrium.Terangkan jawapan anda

……………………………………………………………………………………………

[2 marks]

Page 2: Soalan Pppa Kimia k2 2014 (Set 1)

X Y Z

(b) When metals of group 1, Lithium, Sodium and Potassium react with water, bubbles of colourless gas are evolved.Apabila logam-logam Kumpulan 1 Lithium, Natrium dan Kalium bertindak balas dengan air, gelembung- gelembung gas tanpa warna dibebaskan.

DIAGRAM [RAJAH] 1.2

Diagram 1.2 shows the reaction of the first three alkali metals with water in three different beakers labeled as W, X and Y.

Rajah 1.2 menunjukkan tindak balas bagi tiga logam alkali yang pertama dengan air di dalam tiga bikar berlabel W, X dan Y.

(i) In which beaker shows the reaction of potassium with water?

Bikar manakah menunjukkan tindak balas kalium dengan air?

………………………………………………………………………………………..

[1 mark] (ii) Based on Diagram 1.2, name the gas evolved when metals of Group 1 react with water. Berdasarkan Rajah 1.2, namakan gas yang terbebas apabila logam Kumpulan 1 bertindak balas dengan air.

……………………………………………………………………………………….....

[1 mark]

(iii) State one observation when a few drops of phenolphthalein indicator is added into the solution formed in beaker W, X and Y.

Explain your answer. Nyatakan satu pemerhatian apabila beberapa titik penunjuk fenolftalein dimasukkan ke dalam larutan yang terhasil di dalam bikar W, X dan Y.

Terangkan jawapan anda.

FlameNyalaan

Page 3: Soalan Pppa Kimia k2 2014 (Set 1)

……………………………………………………………………………………….

……………………………………………………………………………………….

[2 marks]

2. Diagram 2 shows part of the Periodic Table of the Elements. Na, Mg, Cl and Ar represent the actual symbol of the elements. Rajah 2 menunjukkan sebahagian daripada Jadual Berkala Unsur. Na, Mg, Cl dan Ar mewakili simbol sebenar unsur

Diagram 2.1Rajah 2.1

Based on Diagram 2.1Berdasarkan Rajah 2.1

(a) (i) Name the element which is located in Group 2 Period 3 ? Namakan unsur yang terletak dalam kumpulan 2 Kala 3? ……………………………………………………………………………………….....

[ 1 mark ](ii) Explain why the element in (a) (i) is located in period 3?

Terangkan mengapa unsur dalam (a) (i) terletak dalam kala 3?

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

(b) (i) Compare the electronegativity between sodium and chlorineBandingkan keelektronegatifan di antara natrium dan klorin

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

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

………………………………………………………………………………….............

…………………………………………………………………………………….........

Page 4: Soalan Pppa Kimia k2 2014 (Set 1)

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

(c) (i) Name the element which exists as monoatomic gasNamakan unsur yang wujud sebagai monoatom

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

(i) State one uses of element named in c(i)Nyatakan satu kegunaan unsur yang dinamakan dalam c(i)

…………………………………………………………………………………… [ 1 mark ]

(d) Chlorine gas Cl2 reacts with hot iron wool to produce a brown solidGas klorin Cl2 bertindak balas dengan wul besi panas untuk menghasilkan pepejal berwarna perang.

(i) Complete the chemical equation belowLengkapkan persamaan di bawah.

____ Cl2 + _____ Fe ______FeCl3

(ii) Based on chemical equation in (e) (i), calculate the maximum mass of iron (III) chloride formed when 0.05 mol of iron is used in the reaction.[ Relative atomic mass: Fe = 56 ; Cl =35 ]Berdasarkan persamaan kimia pada (e) (i), hitungkan jisim maksimumferum (III) klorida yang terbentuk apabila 0.05 mol ferum digunakan dalam tindak balas. [ Jisim Atom Relatif : Fe = 56 ; Cl =35 ]

[ 1 mark ]

(iii) Diagram 2.2 shows the apparatus set up for three different experiments. Mark ( / ) in the box which shows the correct apparatus set up for the reaction between chlorine gas Cl2 and hot iron wool. Rajah 2.2 menunjukkan susunan radas untuk tiga eksperimen berbeza. Tandakan ( /) dalam petak yang menunjukkan susunan radas yang betul bagi tindak balas antara gas klorin Cl2 dengan wul besi panas.

Page 5: Soalan Pppa Kimia k2 2014 (Set 1)

R

S

Diagram 2.2Rajah 2.2

[ 1 mark]

3. (a) Diagram 3.1 shows a aloe vera plant. Aloe vera can be used as a traditional medicine. Rajah 3.1 menunjukkan tumbuhan aloe vera. Aloe vera boleh digunakan sebagai ubatan tradisional.

Diagram 3.1Rajah 3.1

(i) Which of the parts R or S, is used as the main source of medicine? Mark (/) your answer in the box provided in Diagram 3.1.Antara bahagian R dan S, yang manakah digunakan sebagai sumber utama ubat?

[1mark]

(ii) What injury can be treated using aloe vera?

Page 6: Soalan Pppa Kimia k2 2014 (Set 1)

Apakah jenis kecederaan yang boleh dirawat oleh aloe vera?

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

(iii) How is aloe vera used to treat the injury in 3(a)(ii)?Bagaimanakah cara aloe vera digunakan untuk merawat kecederaan di 3(a)(ii)?

…………………….……………………………………………………………………

[1 mark](b) Table 3.1 shows the functions of three types of modern medicine.

Jadual 3.1 menunjukkan fungsi tiga jenis ubat moden.

Table3.1

Table 3.1 [Jadual 3.1]

(i) Complete Table 3.1 to show the type of medicine which has the function given in the table. Lengkapkan Jadual 3.1 untuk menunjukkan jenis ubat yang mempunyai fungsi yang dinyatakan dalam jadual itu.

[3 marks]

(ii) Give an example of medicine of type X.Beri satu contoh ubat jenis X.

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

(iii) Tranquilizer is an example of medicine of type Y. Give one change that might happen to a patient’s emotions when treated using this medicine. Trankuilizer adalah contoh ubat daripada jenis Y Beri satu perubahan yang mungkin berlaku kepada perasaan pesakit yang dirawat menggunakan ubat ini.

FunctionFungsi

Type of medicineJenis ubat

Relieve painMenghilangkan rasa sakit X : ............................................

.

Change the emotions and behaviour of the patientMengubah emosi dan kelakuan pesakit

Y:...............................................

Kill or slow down the growth of bacteriaMembunuh atau merencatkan pembiakan bakteria

Z:...............................................

Page 7: Soalan Pppa Kimia k2 2014 (Set 1)

Dilute nitric acid[Asid nitric cair]X

W and Sodium nitrate solution[W dan larutan Natrium nitrat]

Zinc nitrate[ zinknitrat ]

Substance A + gas B + Nitrogen dioxide gas[bahan A + gas B + gasnitrogen dioksida]

Sodium carbonate solution[larutan natrium karbonat]

………………………………………………………………………………………… [1 mark]

(iv) What is the correct usage of medicine of type Z? Explain.Apakah cara penggunaan yang betul bagi ubat jenis X? Terangkan.

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

4. Diagram 4.1 shows the formation of zinc nitrate and its changes to several other chemicalcompounds.

Rajah 4.1 menunjukkan pembentukkan zink nitrat dan perubahannya kepada beberapa bahan kimia lain.

Diagram 4.1 [Rajah 4.1]

(a) X is a white powder that reacts with dilute nitric acid to form zinc nitrate. Name compound X.

X ialah serbuk putih yang boleh bertindak balas dengan asid nitrik cair untuk menghasilkan zink nitrat. Nama sebatian X

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

(b) When Zinc nitrate solution is added to Sodium carbonate solution in a beaker, W precipitate and sodium nitrate solution are formed. Apabila larutan zink nitrat dicampurkan dengan larutan sodium carbonat dalam sebuah tabung didih, mendakan W dan larutan natrium nitrat terbentuk.

(i) Name W precipitate.Namakan mendakan W.

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

(ii) How can you separate W precipitate from the sodium nitrate solution?

Page 8: Soalan Pppa Kimia k2 2014 (Set 1)

Bagaimanakah anda dapat mengasingkan mendakan W daripada larutan natrium nitrat?

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

[1 mark](iii) W precipitate produced from (b)(iii) is heated and then is cooled. State your

observation. Mendakan W yang terhasil daripada (b)(iii) dipanaskan dan kemudian disejukkan. Nyatakan pemerhatian anda?

……………………………………………………………………………………………

……………………………………………………………………………………………[2 marks]

(c) When zinc nitrate is heated, substance A, gas B and nitrogen dioxide gas are produced. Apabila zink nitrat dipanaskan, bahan A, gas B dan gas nitrogen dioksida terhasil.

(i) Write the chemical equation for the decomposition of zinc nitrate when it is heated.Tuliskan persamaan kimia penguraian zink nitrat apabila dipanaskan.

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

(ii) When 37.8g zinc nitrate is heated, calculate the volume of nitrogen dioxide gas produced at room temperature. Apabila 37.8g zink nitrat dipanaskan, kira isipadu gas nitrogen dioksida yang terhasil pada keadaan bilik.

Page 9: Soalan Pppa Kimia k2 2014 (Set 1)

Propene, C3H6

Propena

Substance S and gas T

BahanSdan gas T

Substance P

BahanP

Substance QBahanQ

Substance R

BahanR

[3 marks]

5. Diagram 5 shows the flow chart of a series of reactions undergone by propene.Rajah 5 menunjukkan carta alir siri tindakbalas yang dialami oleh propena.

Diagram 5Rajah 5

(a) Name the homologous series of propene.Namakan siri homolog untuk propena.

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

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

[1 mark](b) Draw the structural formula of substance P.

Lukiskan formula struktur bahan P.

[1 mark]

(c) Propene is burnt completely in air to produce substance S and gas T.Propena terbakar lengkap dalam udara untuk menghasilkan bahan S dan gas T .

(i) Write the balanced chemical equation for the reaction in 5(c).Tuliskan persamaan kimia seimbang bagi tindak balas dalam5(c).

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

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

(ii) Describe briefly the chemical test to identify gas T.Huraikan secara ringkas ujian kimia untuk mengenalpasti gas T.

HydrationPenghidratan

KMnO4 + H2SO4

Process I Process I

Combustion Pembakaran Process II

Process II

Page 10: Soalan Pppa Kimia k2 2014 (Set 1)

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

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

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

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

(d) Draw a labelled diagram for the apparatus set-up used in Process I.Lukiskan rajah berlabel untuk susunan radas yang digunakan dalam proses I.

[2 marks]

(e) Name another chemical that can be used to replace acidified potassium manganate(VII) solution in Process I .Namakan bahan kimia lain yang boleh digunakan untuk menggantikan larutan kalium manganat(VII) berasid dalam proses I.

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

. [1 mark]

(f) Based on Process II,Berdasarkan Proses II,

(i) Write the chemical formula of substance R.Tulis formula kimia bahan R

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

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

[1 mark] (ii) What would be observed when substance R is added into the water?

Apakah yang akan diperhatikan apabila sebatian R ditambah ke dalam air?

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

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

[1 mark]

Page 11: Soalan Pppa Kimia k2 2014 (Set 1)

ThermometerTermometer

Copper canBekas kuprum

WaterAir

Spirit lampPelita spirit

6. Diagram 6 shows the apparatus set-up to determine the heat of combustion of an alcohol.

Rajah 6 menunjukkan susunan radas untuk menentukan haba pembakaran bagi suatu alkohol.

Diagram 6 Rajah 6

Table 6 shows the result of this experiment.Jadual 6 menunjukkan keputusan eksperimen ini.

Mass of water (g)Jisim air (g)

500.00

Mass spirit lamp + propanol before combustion (g)Jisim pelita spirit + propanol sebelum pembakaran(g)

246.75

Mass spirit lamp + propanol after combustion (g)Jisim pelita spirit + propanol selepas pembakaran (g)

244.95

Initial temperature of water (ºC)Suhu awal air (ºC)

28.50

Highest temperature of water (ºC)Suhu tertinggi air (ºC)

58.50

(a) What is the meaning of heat of combustion in this experiment?Apakah maksud haba pembakaran di dalam eksperimen ini?

...

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

(b) Write the chemical equation for the combustion of propanol.Tuliskan persamaan kimia bagi tindak balas pembakaran propanol.

Table 6Jadual 6

Page 12: Soalan Pppa Kimia k2 2014 (Set 1)

...………………………………………………………………………………………..

[2 marks]

(c) (i) Calculate the heat released during the reaction. [Specific heat capacity of the water, c = 4.2 J g -1 oC-1; Density of the water = 1 g cm-3] Hitungkan haba yang dibebaskan semasa tindak balas. [Muatan haba tentu bagi air, c = 4.2 J g-1 oC-1; Ketumpatan air

= 1 g cm-3]

[2 marks](ii) Calculate the number of moles of propanol used.

[Relative atomic mass: C =12, O =16, H = 1] Hitungkan bilangan mol propanol yang digunakan

[Jisim atom relatif: C =12,O =16, H = 1]

[1 mark]

(iii) Calculate the heat of combustion. Hitungkan haba pembakaran.

[2 marks]

(d) Draw the energy level diagram for the reaction.Lukis rajah aras tenaga bagi tindak balas itu.

Page 13: Soalan Pppa Kimia k2 2014 (Set 1)

[2 marks]

(e) State one precautionary step that can be taken when carrying out the experiment above.

Nyatakan satu langkah berjaga-jaga yang perlu diambil semasa menjalankan ekperimen di atas.

…....……………………………………………………………………………………

…....………………………………………………………………………………........

[1 mark]

Page 14: Soalan Pppa Kimia k2 2014 (Set 1)

Section B(Answer one question in this section)

7. (a) Table 7 shows the observations for the reaction of hot metal powders with oxygen.Jadual 7menunjukkan pemerhatian bagi tindak balas antara serbuk logam yang panas dengan oksigen.

Metal[Logam] Observation[Pemerhatian]X Glows brightly

Berbara terangY Burns brightly

Menyala dengan terangZ Burns with a very bright white flame.

Menyala dengan nyalaan putih yang sangat terang

Table 7[Jadual7]

(i) Based on the observation in theTable 7, Why Z burns with a very bright flame Arrange the metal X, Y and Zin descending order based on their

reactivity towards oxygen.Berdasarkan pemerhatian dalam Jadual 7, mengapakah magnesium menyala dengan nyalaan yang sangat

terang susunkan logam X, Y dan Z dalam tertib menurun berdasarkan

kereaktifannya terhadap oksigen. [2 marks]

(ii) If Y is aluminium, write the chemical equation for the reaction.Jika Y adalah aluminium, tulis persamaa nkimia bagi tindak balas

itu.[2 marks]

(iii) State two information obtained from reaction in a(ii), in term of qualitative and

quantitative aspect.Nyatakan dua maklumat yang bole hdidapati daripada tinda kbalas dalam (ii) daripada aspek kualitatif da nkuantitatif

[2 marks]

(iv) 2.7 g of aluminium is used in the reaction.Calculate the mass of aluminiumoxide produced.

Page 15: Soalan Pppa Kimia k2 2014 (Set 1)

[Relative atomic mass: O = 16; Al = 27]. 2.7 g aluminium digunakan dalam tindak balas ini.Hitung kan jisim

aluminiumoksida yang dihasilkan.[Jisim atom relatif: O = 16, Al = 27].

[3 marks]

(b) Table 7 shows the percentage composition by mass of vitamin C.Jadual 7 menunjukka nperatus komposisi jisim vitamin C.

ElementUnsur

PercentagePeratus

KarbonKarbon

40.90 %

HydrogenHidrogen

4.55 %

oxygenoksigen

54.55%

Table 7Jadual 7

The molar mass vitamin C is 176 gmol-1.Jisim molar bagi vitamin C ialah 176 gmol-1

(i) Determine the molecular formula of vitamin C.[Relative atomic mass: O = 16; C = 27; H = 1]. Tentukan formula molekulbagi vitamin C.[Jisim atom relatif: O = 16; C = 27; H = 1]

[7 marks]

(c) The heating of solid copper (II) carbonate produced black solid and released colourless gas.Pemanasa npepejal kuprum(II) karbonat menghasilkan pepejal hitam dan membebaskan gas tidak berwarna.

(i) Name the black solid.Namakanpepejalhitam.

[1 mark] (ii) Descibe how to identify the present of colourless gas produced.

Huraikan bagaimana untuk mengenalpasti gas tidak berwarna terhasil.

[3 marks]

Page 16: Soalan Pppa Kimia k2 2014 (Set 1)

8.

Diagram 8.1[rajah 8.1]

Diagram 8.1 above shows a baker making his dough in order to make bread. The statement above shows the suitable condition for dough to rise faster.Gambarajah 8.1 di atas menunjukkan seorang tukang masak membuat adunan roti. Pernyataan di atas menunjukkan keadaan yang sesuai untuk adunan itu naik dengan lebih cepat.

(a) (i) From the situation above, identify the factor that affects the rate of rising of dough.

Dari situasi di atas, kenalpastikan factor yang mempengaruhi kadar tindak balas.

Bread dough rises faster in a warm place than in a cool place.Adunan roti menaik dengan lebih cepat di tempat yang panas berbanding tempat yang sejuk.

Page 17: Soalan Pppa Kimia k2 2014 (Set 1)

[1 mark](ii)What is the suitable unit for the rate of rising of dough in this

situation. Apakah unit yang paling sesuai untuk mengukur kadar penaikan adunan roti?

[1 mark]

(b) (i) Define rate of reaction for the above situation.Takrifkan kadar tindak balas untuk situasi di atas.

[1 mark]

SetSet

Room conditionKeadaan

bilik

Time taken/minMasa yang diambil/min

ACool place

Tempat sejuk210.0

BWarm place

Tempat panas45.0

Table 8.2 [table 8.2]

(ii)Table 8.2 above shows the time taken for the dough to rise in different conditions.

Calculate the rate of rising of dough based on the observation in Table 8.2 above for Set A and B.Jadual 8.2 di atas menunjukkan masa yang diambil untuk adunan menaik dalam keadaan yang berbeza.Hitungkan kadar kenaikan adunan berdasarkan pemerhatian pada Jadual 8.2 bagi Set A dan Set B.

[2 marks] (c) State two other factors that affect rate of reaction.

Nyatakan dua factor lain yang mempengaruhi kadar tindak balas.[2 marks]

(d) Discuss using suitable examples, how the factors stated in 8(c) above affect the rate of reaction in terms of collision theory of particles. Bincangkan dengan menggunakan contoh yang sesuai, bagaimana factor-faktor tersebut pada 8(c) di atas, mempengaruhi kadar tindak balas berdasarkan teori pelanggaran zarah.

[9 marks]

(e) State the suitable conditions that increase the rate of reaction in Haber Process. Include a chemical equation for Haber process.Nyatakan keadaan yang sesuai yang digunakan dalam Proses Haber untuk meningkatkan kadar tindak balas.Tuliskan persamaan tindak balas bagi proses Haber.

[4 marks]

Page 18: Soalan Pppa Kimia k2 2014 (Set 1)

Y

+

Z

Section B(Answer one question in this section)

9. (a) Diagram 10shows the electron arrangement of a compound formed from thereaction between element Y and elementZ. These letters are not the actual symbols of the elements.Diagram 10 menunjukkan susunan elektron bagi sebatian terbentuk daripada tindak balas di antara unsur Y dan unsur Z. Huruf yang diwakilkan adalah bukan simbol sebenar elemen tersebut.

Diagram 10 [Rajah 10]

Based on Diagram 10, write the electronarrangement of atom Z. Explain theposition of element Z in the PeriodicTable of theElements.Berdasarkan Rajah 10, tuliskan susunan elektron bagi atom Z. Terangkan kedudukan unsur Z dalam Jadual Berkala Unsur.

[5 marks]

(b) (i) Table 10 shows the proton number for atoms P, Q and R.These letters are not the actual symbols of the elements.

Page 19: Soalan Pppa Kimia k2 2014 (Set 1)

Jadual 10 menunjukkan nombor proton bagi atom P, Q dan R. Huruf-huruf ini bukan simbol sebenar bagi unsur-unsur.

Elements/Unsur Protonnumber/ Nombor ProtonP 11Q 17R 6

Table 10 [Jadual 10)

Byreferring totheinformation in Table10, choose 2 elements that can form a compound that can conduct electricity in molten and aqueous solution. Explain the formation of the compound. Merujuk kepada maklumat dalam Jadual 10, pilih 2 unsur yang membentuk sebatian yang boleh mengkonduksi arus dalam keadaan leburan atau larutan akues. Huraikan pembentukkan ikatan tersebut.

[7 marks]

(ii) The compound formed in b)(i) cannot conduct electricity insolid state but can conduct electricity aqueous solution. Describe an experiment to prove this statement. In your description, include : Procedure Observation

Sebatian yang terbentuk dalam b)(i) tidak boleh mengkonduksi arus dalam keadaan pepejal tetapi boleh mengkonduksi elektrik dalam larutan akues. Huraikan satu eksperimen untuk membuktikan pernyataan ini. Dalam huraian anda, sertakan : Prosedur eksperimen Pemerhatian

[8 marks]10. (a) Diagram 10.1 shows a water droplet on a piece of iron.

Rajah 10.1 menunjukkan setitis air di atas sekeping besi.

Diagram 10.1Rajah 10.1

(b) Diagram 10.2 shows an apparatus set-up to investigate the effect of two different metals on the rusting of iron.Rajah 10.2 menunjukkan susunan radas untuk mengkaji kesan dua logam berbeza ke atas pengaratan besi.

Iron nailPaku besi

WaterAir

OxygenOksigen

IronBesi

Page 20: Soalan Pppa Kimia k2 2014 (Set 1)

Diagram 10.2Rajah 10.2

The result of this experiment after three days is shown in Table 10.Keputusan eksperimen selepas tiga hari ditunjukkan dalam Jadual 10.

Pairs of metalsPasangan logam

ObservationPemerhatian

Iron, magnesiumBesi, magnesium

No changeTiada perubaahn

Iron, copperBesi, kuprum

Dark blue colourWarna biru gelap

Table 10Jadual 10

Based on Table 10, compare and contrast the observations. Explain the observations.Berdasarkan Jadual 10, banding dan bezakan pemerhatian yang diperoleh. Terangkan pemerhatian.

[6 marks]

(c)

You are given the following apparatus: U-tube, galvanometer, connecting wires, stopper, dropper, carbon electrodes and a retort stand with clamps. Suggest a suitable chemical and describe an experiment to verify the above statement using the given apparatus.Anda diberi radas berikut:Tiub-U, galvanometer, wayar penyambung, penututp, penitis, elektrod karbon dan kaki retort dengan penyepit.Cadangkan bahan kimia yang sesuai dan huraikan satu eksperimen untuk mengesahkan pernyataan di atas dengan menggunakan radas yang diberi.

[10 marks]

Chlorine is a good oxidising agent. Klorin ialah agen pengoksidaan yang baik.

Gelatine + Potassium hexacyanoferrate(III)

Gelatin + Kalium heksasianoferat(III)

MagnesiumMagnesium

CopperKuprum