chemF5JULY

10

ChemistryJuly MonthlyTest2013

1 hour

SEKOLAH MENENGAH KEBANGSAAN SRI UTAMA

JULY MONTHLY TEST

CHEMISTRY

One hour

Nama:

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

5 SCIENCE 1

45 DO NOT OPEN THIS QUESTION BOOKLET UNTIL BEING TOLD TO DO SO

For Examiners UseQuestionFull MarkMark obtained12121237Total4041

3 1. Tuliskan nama anda pada ruang yang disediakan.

2. Kertas soalan ini adalah dalam dwibahasa.

3. Soalan dalam bahasa Inggeris mendahului soalan yang sepadan dalam bahasa Melayu.

4. Jawab semua soalan.

1 Diagram 1.1 shows the apparatus set-up for three sets of experiment to investigate the effect of copper and magnesium on the rusting of iron, Fe.Rajah 1.1 menunjukkan susunan radas untuk tiga set eksperimen untuk mengkaji kesan logam kuprum dan magnesium ke atas pengaratan besi, Fe.

SetApparatus set-upSusunan radas

Day 1Hari pertamaDay 5Hari ke-5

I

Gel containing potassium hexacyanoferrate (III) solutionGel mengandungi larutan kalium heksasianoferat(III)

Iron nailPaku besiGel containing potassium hexacyanoferrate (III) solutionGel mengandungilarutan kalium heksasianoferat(III)Iron nailPaku besiA few blue spotsSedikit tompok-tompok biru

II

Gel containing potassium hexacyanoferrate (III) solutionGel mengandungi larutan kalium heksasianoferat(III)Iron nail coiled with copper Paku besi dililit dengan kuprumGel containing potassium hexacyanoferrate (III) solutionGel mengandungi larutan kalium heksasianoferat(III)

Iron nail coiled with copperPaku besi dililit denganA lot of blue spotsBanyak tompok-tompok biru

IIIGel containing potassium hexacyanoferrate (III) solutionGel mengandungi larutan kalium heksasianoferat(III)Iron nail coiled with magnesium Paku besi dililit dengan magnesiumGel containing potassium hexacyanoferrate (III) solutionGel mengandungi larutankalium heksasianoferat(III)

Iron nail coiled with magnesiumPaku besi dililit dengan magnesiumNo blue spotsTiada tompok-tompok biru

Diagram 1.1Rajah 1.1

5

(a) State one observation that can be obtained from each set of the experiment in Table 1.2.Nayatakan pemerhatian yang dapat diperoleh daripada setiap set eksperimen di dalam Jadual 1.2.

For Examiners Use

SetObservationPemerhatian

I

II

III

Table 1.2Jadual 1.2

[3 marks][3 markah]

1(a)

(b)(i) State the inference for each set of the experiment in Table 1.3.Nyatakan inferens bagi setiap set eksperimen di dalam Jadual 1.3.

SetInferenceInferens

I

II

III

Table 1.3Jadual 1.3

[3 marks][3 markah]

1(b)(i)

For Examiners Use

1(b)(ii)

1(c)

1(d)

(b) (ii) Based on the experiment, arrange the three metals in ascending order of electropositivity.Berdasarkan eksperimen, susun ketiga-tiga logam mengikut tertib keelektropositifan menaik.

.................................. , .................................. , .................................[3 marks][3 markah]

(c) For the experiment, state:Bagi eksperimen ini, nyatakan:

(i) The manipulated variablePembolehubah dimanipulasi... (ii)The responding variablePembolehubah bergerak balas... (iii)The constant variablePembolehubah dimalarkan

...[3 marks][3 markah]

(d) State the hypothesis for the experiment.Nyatakan hipotesis untuk eksperimen ini.

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

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

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

(e) Another experiment is conducted by coiling the iron nail with silver.Predict the observation for this experiment compared to the experiments inDiagram 1.1.Suatu eksperimen lain dijalankan dengan melilitkan paku besi dengan logam argentum.Ramalkan pemerhatian bagi eksperimen ini berbanding dengan eksperimen di dalamRajah 1.1.

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

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

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

(f) State the operational definition for the rusting of iron in the experiment.Nyatakan definisi secara operasi bagi pengaratan besi dalam tindak balas .

...

...

...[3 marks][3 markah]

For Examiners Use

1(e)

1(f)

Total

21

2. Diagram 2.1 shows the apparatus set-up used to investigate the electrical conductivity of sodium chloride solution.Rajah 2.1 menunjukkan susunan radas untuk mengkaji kekonduksian elektrik oleh larutan natrium klorida.

CarbonKarbon

Sodium chlorideNatrium klorida


The experiment is repeated by replacing sodium chloride solution with ethanol, glucose solution and lead(II) nitrate solution.Eksperimen diulangi dengan menggantikan larutan natrium klorida dengan etanol, larutan glukosa dan larutan plumbum(II) nitrat

(a) Diagram 2.2 shows the ammeter readings for all solutions.Record the ammeter readings in the spaces provided. Rajah 2.2 menunjukkan bacaan ammeter untuk semua larutan. Catat bacaan ammeter pada ruang yang disediakan

Sodium chloride solutionLarutan natrium klorida......................................EthanolEtanol......................................Glucose solutionLarutan glukosa...............................Lead(II) nitrate solutionLarutan plumbum(II) nitrat......................................

7

For Examiners Use


[3 marks][3 markah]

2(a)

(b) Classify the substances used in the experiment into electrolytes and non- electrolytes.Kelaskan bahan-bahan yang digunakan di dalam eksperimen kepada elektrolit dan bukan elektrolit.

[3 marks][3 markah] (c) (i) What will happen to the ammeter reading in the experiment shown inDiagram 2.1 after 10 minutes?Apakah yang akan berlaku kepada bacaan ammeter bagi eksperimen yang ditunjukkan di dalam Rajah 2.1 selepas 10 minit?

...

.......

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

(ii) Explain the answer in 2(c)(i).Terangkan jawapan di 2(c)(i).

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

...

Total

12

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

..[3 marks] [3 markah]

2(b)

3.

Diagram 3 shows the apparatus set-up of an experiment to investigate the redox reaction between acidified potassium manganate(VII) solution and iron(II) sulphate solution.Rajah 3 menunjukkan susunan radas eksperimen bagi menyiasat tindak balas redoks antara larutan kalium manganat(VII) berasid dan larutan ferum(II) sulfat.

SULIT84541/2

9

4541/2 Copyright Reserved MARA[See next page

Carbon AKarbon A

Acidified potassium manganate(VII) solution Larutan kalium manganat(VII) berasid

Diagram 3Rajah 3

Carbon BKarbon B

Iron(II) sulphate solutionLarutan ferum(II) sulfat

Dilute sulphuric acidAsid sulfurik cair

3(a)

(a) What is meant by redox reaction?Apakah yang dimaksudkan dengan tindak balas redoks?

...

...[1 mark][1 markah]

3(b)

(b) Show the direction of the flow of electrons in Diagram 3.Tunjukkan arah pengaliran elektron pada Rajah 3.

(c) Calculate the oxidation number of manganese in MnO4- ion.Hitungkan nombor pengoksidaan bagi mangan dalam ion MnO4-.

[1 mark][1 markah]

.

[2 mark][2 markah]

(d) Based on the reaction that takes place at carbon B :Merujuk kepada tindak balas yang berlaku di karbon B :

(i) Write the chemical formula of iron(II) sulphate.Tuliskan formula kimia bagi ferum(II) sulfat.

3(d)(i)

[1 markah]

(ii) State the colour change of the solution after 30 minutes.Nyatakan perubahan warna larutan selepas 30 minit.

3(d)(ii)

[1 markah]

(iii) Write the half equation for the reaction.Tulis setengah persamaan bagi tindak balas.

3(d)(iii)

[2 markah]

7END OF QUESTIONS

PREPARED BY CHECKED BY VERIFIED BY . .. (EN N.AZRUL IKWAN) (EN.ZAIDI CHE MAT) ( PN.ONG SOON MOI) CHEMISTRY TEACHER CHEMISTRY HEAD TEACHER SCIENCE& MATHS GKMP

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