Ppt kimia ting 4 paper 3 (2018) answer scheme

SKEMA MARKAH

PPT KIMIA TING. 4 (2018) KERTAS 3

Question No.

Mark Scheme

Mark

Able to state all observations correctly Sample answer: Set I

1(a)

II

Observation Pemerhatian Iron wool glows brighter than in bromine gas Wul besi membara lebih terang daripada dalam gas bromin // Iron wool glows very brightly Wul besi membara dengan terang // Iron wool burns brightly Wul besi terbakar dengan terang

3

Iron wool glows dimly / slowly Wul besi membara dengan malap / perlahan

Able to state one observation correctly

2

Able to state any relevant observation Sample answer: 1 Iron wool glows Wul besi membara No response given / Wrong response

0

1

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Question No.

PPT KIMIA TING. 4 (2018) KERTAS 3

Mark Scheme

Mark

Able to state the inference correctly Sample answer: The reaction between iron wool and chlorine is the most reactive followed by bromine and iodine Tindak balas antara wul besi dengan klorin adalah paling reaktif diikuti oleh bromin dan iodin

3

Able to state the inference less correctly Sample answer:

1(b)

Chlorine is the most reactive followed by bromine and iodine Klorin paling reaktif diikuti oleh bromin dan iodin // Reactivity of halogens towards iron wool decreases when going down Group 17 Kereaktifan halogen terhadap wul besi berkurangapabila menuruni Kumpulan 17 // Reactivity decreases when going down Group 17 from chlorine to iodine Kereaktifan berkurang apabila menuruni Kumpulan 17 daripada klorin kepada iodin

2

Able to state an idea of inference Sample answer:

1

Reaction occured // Tindak balas berlaku No response given / Wrong response

0

2

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Question No.

PPT KIMIA TING. 4 (2018) KERTAS 3

Mark Scheme

Mark

Able to state the relationship between the position reactivity of halogens correctly Sample answer: The higher the position of a halogen in the Periodic Table of Elements, the more reactive it is in the reaction with iron Semakin tinggi kedudukan halogen dalam Jadual Berkala Unsur, semakin reaktif tindak balasnya dengan besi

3

Able to state the relationship between the position reactivity of halogens less accurately Sample answer:

1(c)

Chlorine is the most reactive followed by bromine and iodine Klorin paling reaktif diikuti oleh bromin dan iodin // Reactivity of halogen decreases when going down the group Kereaktifan halogen menurun apabila menuruni kumpulan

2

Able to state an idea of inference Sample answer: The reactivity of halogen towards iron are different Tindak balas halogen terhadap besi adalah berbeza // Chlorine is the most reactive halogen Klorin adalah halogen yang paling reaktif No response given / Wrong response // When going down the group, reactivity of halogens increases Apabila menuruni kumpulan, kereaktifan halogen meningkat

1

0

3

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Question No.

PPT KIMIA TING. 4 (2018) KERTAS 3

Mark Scheme

Mark

Able to state all 3 variables correctly Sample answer: Manipulated variable : Chlorine, bromine and iodine Klorin, bromin dan iodin // Type of halogen / element Jenis halogen / unsur 3 1(d)

Responding variable : Reactivity of halogen towards iron Tindak balas antara halogen dengan besi // Brightness of glow Kecerahaan baraan Fixed variable : Mass of iron wool Jisim wul besi Able to state any 2 variables correctly Able to state any 1 variable correctly No response given / Wrong response

2 1 0

4

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Question No.

PPT KIMIA TING. 4 (2018) KERTAS 3

Mark Scheme

Mark

Able to state the relationship between manipulated variable and responding variable correctly with direction Sample answer: The higher the position of a halogen in the Periodic Table of Elements, the less reactive it is in the reaction with iron Semakin tinggi kedudukan halogen dalam Jadual Berkala Unsur, semakin berkurang kereaktifan tindak balasnya dengan besi

3

Able to state the relationship between manipulated variable and responding variable less correctly [RV first, then MV] 1(e)

Sample answer:

2

The reactivity of halogen decreases when going down the group Kereaktifan halogen berkurang apabila menuruni kumpulan Able to state an idea of hypothesis Sample answer: The reactivity depends on the type of halogen Kereaktifan bergantung kepada jenis halogen // The reactivity of halogens towards iron is different Kereaktifan halogen terhadap besi adalah berbeza

1

No response given / Wrong response

0

5

SKEMA MARKAH

Question No.

PPT KIMIA TING. 4 (2018) KERTAS 3

Mark Scheme

Mark

Able to arrange all three halogens in descending order of reactivity correctly Sample answer: Chlorine, bromine, iodine // Cl2, Br2, I2 // Klorin, bromin, iodin

3

Able to arrange two halogens in descending order of reactivity 1(f)

Sample answer: Bromine, iodine, chlorine // Br2, I2, Cl2 // Bromin, iodin, klorin Iodine, chlorine, bromine // I2, Cl2, Br2 // Iodin, klorin, bromin

2

Able to arrange the halogens in ascending order of reactivity Sample answer: Iodine, bromine, chlorine // I2, Br2, Cl2 // Iodin, bromin, klorin

1

No response given / Wrong response

0

6

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Question No.

PPT KIMIA TING. 4 (2018) KERTAS 3

Mark Scheme

Mark

Able to state the operational definition correctly based on the following criteria: 1. What is done 2. What is observed Sample answer:

3

The brightness of glow / flame when halogen is flowed to hot iron wool Kecerahan baraan / nyalaan apabila halogen dialirkan kepada wul besi panas Able to state the operational definition less correctly 1(g)

Sample answer: The brightness of glow / flame when halogen reacts with hot iron wool Kecerahan baraan / nyalaan apabila halogen dertindak balas dengan wul besi panas

2

Able to give an idea for the operational definition Sample answer: 1 Different brightness / flame / glow Nyalaan / Baraan berbeza No response given / Wrong response

0

7

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Question No.

PPT KIMIA TING. 4 (2018) KERTAS 3

Mark Scheme

Mark

Able to classify bromine, chlorine, iodine, iron and soda lime into element and compound correctly Answer:

1(h)

Element Compound Unsur Sebatian • Bromine / Bromin • Soda lime / Soda kapur • Chlorine / Klorin • Iodine / Iodin • Iron / Besi Able to classify any 4 substance correctly Able to classify any 2 substance correctly or reverse classification No response given / Wrong response

Question No.

Mark Scheme

3

2 1 0

Mark

Able to predict the observation correctly if fluorine gas is used Sample answer: Iron wool burns very brightly Wul besi menyala dengan sangat terang // Iron wool burns the brightest Wul besi menyala paling terang

3

Able to predict the observation less accurately if fluorine gas is used 1(i)

Sample answer:

2

Iron wool burns // Wul besi menyala Able to give a relevant idea Sample answer:

1

Reaction occured // Tindak balas berlaku No response given / Wrong response

0

8

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Question No.

PPT KIMIA TING. 4 (2018) KERTAS 3

Mark Scheme

Mark

Able to record all three masses to two decimal places correctly Answer:

2(a)

Mass of crucible and lid : Jisim mangkuk pijar dan penutup 25.35 g Mass of crucible, lid and magnesium ribbon : Jisim mangkuk pijar, penutup dan pita magnesium 27.75 g Mass of crucible, lid and magnesium oxide : Jisim mangkuk pijar, penutup dan magnesium oksida 29.35 g Able to record any two masses to two decimal places correctly // Able to record all three masses with incorrect decimal place Able to record any one mass to two decimal places correctly No response given / Wrong response

3

2 1 0

9

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Question No.

PPT KIMIA TING. 4 (2018) KERTAS 3

Mark Scheme

Mark

Able to determine the empirical formula of magnesium oxide and show the working correctly Answer: Mass of magnesium and oxygen Mass of magnesium Jisim magnesium = 27.75 – 25.35 g / 2.4 g Mass of oxygen Jisim oksigen = 29.35 – 27.75 g / 1.6 g 3

2(b)

Number of moles of magnesium and oxygen Number of moles of magnesium Bilangan mol magnesium = 2.4 mol / 0.1 mol 24 Number of moles of oxygen Bilangan mol oksigen = 1.6 mol / 0.1 mol 16 Empirical formula / Formula empirik = MgO Able to show two workings correctly

2

Able to show one working correctly or determine the empirical formula of magnesium oxide correctly

1

No response given / Wrong response

0

10

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PPT KIMIA TING. 4 (2018) KERTAS 3

Question Mark Scheme 3(a) Able to state the problem statement correctly

Marks 3

Sample answer: How does the reactivity of alkali metals // Group 1 metals / element towards water change when going down the group? // Bagaimanakah kereaktifan logam alkali // logam / unsur Kumpulan 1 terhadap air berubah apabila menuruni kumpulan?

How does the reactivity of lithium, sodium and potassium towards water change when going down Group 1?

Bagaimanakah kereaktifan litium, natrium dan kalium terhadap air berubah apabila menuruni Kumpulan 1? // How is the reactivity of alkali metals towards water?

Bagaimanakah kereaktifan logam alkali terhadap air?

Able to state the problem statement

2

Sample answer: How does the reactivity of alkali metals // Group 1 metals / element change when going down the group? // Bagaimanakah kereaktifan logam alkali // logam / unsur Kumpulan 1 berubah apabila menuruni kumpulan?

How does the reactivity of lithium, sodium and potassium change when going down Group 1?

Bagaimanakah kereaktifan litium, natrium dan kalium berubah apabila menuruni Kumpulan 1?

Able to state an idea of the problem statement

1

Sample answer: How is the reactivity of alkali metals // Group 1 metals / element differ?

Bagaimanakah kereaktifan logam alkali // logam / unsur Kumpulan 1 berbeza?

How is the reactivity of lithium, sodium and potassium differ?

Bagaimanakah kereaktifan litium, natrium dan kalium berbeza?

No response given or wrong response

0

11

SKEMA MARKAH

PPT KIMIA TING. 4 (2018) KERTAS 3

Question Mark Scheme 3(b) Able to state all the variables correctly

Marks 3

Sample answer: Manipulated: alkali metals // Group 1 metals / element // lithium, sodium and potassium Logam alkali // logam / unsur Kumpulan 1 // litium, natrium dan kalium Responding: Reactivity of alkali metals // Brightness of flame Kereaktifan logam // kecerahan nyalaan api Fixed: Size of alkali metals // volume of water Saiz logam alkali / isipadu air Able to state any two variables correctly

2

Able to state any one variable correctly

1

No response given or wrong response

0

Question Mark Scheme 3(c) Able to state the relationship between the manipulated variable and the responding variable with direction correctly

Marks 3

Sample answer: When going down Group 1, the reactivity of alkali metals towards water increases // Apabila menuruni Kumpulan 1, kereaktifan logam alkali terhadap air meningkat // When going down Group 1 from lithium to potassium, the reactivity of alkali metals towards water increases // Apabila menuruni Kumpulan 1 daripada litium kepada kalium, kereaktifan terhadap air meningkat // Potassium is the most reactive when reacting with water, followed by sodium and lithium Kalium paling reaktif apabila bertindak balas dengan air, diikuti oleh natrium dan litium Able to state the relationship between the manipulated variable and the responding variable with direction but less correctly.

2

Sample answer: When going down Group 1, the reactivity of alkali metals increases // Apabila menuruni Kumpulan 1, kereaktifan logam alkali meningkat //

12

SKEMA MARKAH

PPT KIMIA TING. 4 (2018) KERTAS 3

When going down Group 1 form lithium to potassium, the reactivity of alkali metals increases // Apabila menuruni Kumpulan 1 daripada litium kepada kalium, kereaktifan meningkat // [RV then MV] The reactivity of alkali metals (towards water) increases when going down the group Kereaktifan logam alkali (terhadap air) meningkat apabila menuruni kumpulan // Potassium is the most reactive when reacting with water compared to sodium and lithium Kalium paling reaktif apabila bertindak balas dengan air berbanding natrium dan litium

Able to give an idea of hypothesis

1

Sample answer: Different alkali metals have different reactivity // Logam alkali berbeza mempunyai kereaktifan berbeza // The reactivity of alkali metals depends on the position of the metal in Group 1 Kereaktifan logam alkali bergantung kepada kedudukan logam dalam Kumpulan 1 No response given or wrong response // When going down the group, reactivity decreases Apabila menuruni kumpulan, kereaktifan menurun

Question Mark Scheme 3(d) Able to state all materials and apparatus completely

0

Marks 3

Sample answer: 1. Lithium Litium 2. Sodium Natrium 3. Potassium Kalium 4. Water Air 5. Filter paper Kertas turas 6. Basin / Pail 13

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PPT KIMIA TING. 4 (2018) KERTAS 3

Besen / Baldi a : container / bekas 7. Knife Pisau 8. Forcep Forsep Able to state four materials and two apparatus

2

Sample answer: 1. Lithium Litium 2. Sodium Natrium 3. Potassium Kalium 4. Water Air 6. Basin / Pail Besen / Baldi 8. Forcep Forsep Able to give an idea of materials and apparatus

1

Sample answer: 1. Lithium Litium 2. Sodium Natrium 3. Potassium Kalium 4. Water Air 6. Basin / Pail Besen / Baldi a : beaker / bikar No response given or wrong response

0

14

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PPT KIMIA TING. 4 (2018) KERTAS 3

Question Mark Scheme 3(e) Able to state all steps of procedure correctly

Marks 3

Sample answer: 1. Cut a small piece of lithium Potong kepingan kecil litium 2. Dry the lithium metal using a filter paper Keringkan logam litium dengan kertas turas 3. Fill a basin half full with water Isikan besen separuh penuh dengan air 4. Put the lithium into the water Letakkan litium ke dalam air 5. Observe and record the changes Perhati dan rekod perubahan yang berlaku 6. Repeat the experiment using sodium and potassium to replace lithium Ulang eksperimen menggunakan natrium dan kalium untuk menggantikan litium Able to state steps 3, 4, 5 and 6

2

Sample answer: 3. Fill a basin half full with water Isikan besen separuh penuh dengan air 4. Put the lithium into the water Letakkan litium ke dalam air 5. Observe and record the changes Perhati dan rekod perubahan yang berlaku 6. Repeat the experiment using sodium and potassium to replace lithium Ulang eksperimen menggunakan natrium dan kalium untuk menggantikan litium Able to state steps 3 and 4

1

Sample answer: 3. Fill a basin half full with water Isikan besen separuh penuh dengan air 4. Put the lithium into the water Letakkan litium ke dalam air No response given or wrong response

0

15

SKEMA MARKAH

PPT KIMIA TING. 4 (2018) KERTAS 3

Question Mark Scheme 3(f) Able to construct a table that consists of: 1. Headings for manipulated and responding variables 2. Complete list of alkali metals

Marks 2

Sample answer: Alkali / Group 1 metals Observation / Reactivity Logam alkali / Logam Kumpulan 1 Pemerhatian / Kereaktifan Lithium Litium Sodium Natrium Potassium Kalium Able to construct a table that consists of: 1. Headings for manipulated and responding variables

1

Sample answer: Alkali / Group 1 metals Observation / Reactivity Logam alkali / Logam Kumpulan 1 Pemerhatian / Kereaktifan

No response given or wrong response

0

END OF ANSWER SCHEME SKEMA JAWAPAN TAMAT

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