Ppt kimia ting 5 paper 3 (2017) answer scheme

SKEMA MARKAH

PPT KIMIA TING. 5 (2017) KERTAS 3

Question Mark Scheme 1(a) Able to record all the diameter of dents correctly with correct decimal place and unit

Marks 3

Answer: Copper: 1.4 cm, 1.4 cm, 1.4 cm Brass: 1.3 cm, 1.3 cm, 1.3 cm Able to record all the diameter of dents correctly with correct decimal place without unit

2

Sample answer: Copper: 1.4, 1.4, 1.4 Brass: 1.3, 1.3, 1.3 Able to state four diameter of dents correctly

1

No response or wrong response

0

Question Mark Scheme 1(b) Able to construct a table with correct label and unit

Marks 3

Sample answer: Type of blocks Jenis blok Copper Kuprum Brass Loyang

Diameter of dents / cm Diameter lekuk / cm I II III

Average / cm Purata / cm

1.4

1.4

1.4

1.4

1.3

1.3

1.3

1.3

Able to construct a table without correct label or unit

2

Able to construct idea of table

1

No response or wrong response

0

1

SKEMA MARKAH

PPT KIMIA TING. 5 (2017) KERTAS 3

Question Mark Scheme 1(c) Able to state the relationship between manipulated variable and the responding variable for both blocks

Marks 3

Sample answer: When brass is used, the diameter of dent is smaller When copper is used, the diameter of dent is bigger // Apabila loyang digunakan, diameter lekuk lebih kecil Apabila kuprum digunakan, diameter lekuk lebih besar // When brass is used, the diameter of dent is smaller than copper Apabila loyang digunakan, diameter lekuk lebih kecil berbanding kuprum Able to state the relationship between manipulated variable and the responding variable for one block only

2

Sample answer: When brass is used, the diameter of dent is smaller // Apabila loyang digunakan, diameter lekuk lebih kecil // When copper is used, the diameter of dent is bigger // Apabila kuprum digunakan, diameter lekuk lebih besar // Able to state the idea of hypothesis

1

Sample answer: Different blocks produce different diameter of dents // Blok yang berbeza menghasilkan diameter lekuk yang berbeza // Diameter of dents is affected by type of blocks // Diameter lekuk dipengaruhi oleh jenis blok No response or wrong response

0

2

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Question 1(d)

PPT KIMIA TING. 5 (2017) KERTAS 3

Mark Scheme Able to state all three variables correctly

Marks 3

Sample answer: Manipulated: Type of blocks // copper and brass blocks // pure metal and alloy Jenis blok // blok kuprum dan loyang // logam tulen dan aloi Responding: (average) diameter of dents (purata) diameter lekuk Fixed: 1. mass of weight // jisim pemberat // 2. 1 kg weight // pemberat 1 kg // 3. height of weight dropped // tinggi pemberat dijatuhkan // 4. 400 cm height // ketinggian 400 cm Able to state any two variables correctly

2

Able to state any one variable correctly

1

No response or wrong response

0

Question Mark Scheme 1(e) Able to state the operational definition for alloy correctly (what is done, what is observed)

Marks 3

Sample answer: Alloy is a block / substance that produces a smaller diameter of dent when one kilogram weight is dropped on it Aloi ialah blok / bahan yang menghasilkan diameter lekuk yang lebih kecil apabila pemberat satu kilogram dijatuhkan ke atasnya // Able to state the operational definition for alloy less correctly

2

Sample answer: Alloy is a block / substance that produces a smaller diameter of dent when weight is dropped on it Aloi ialah blok / bahan yang menghasilkan diameter lekuk yang lebih kecil apabila pemberat dijatuhkan ke atasnya //

3

SKEMA MARKAH

PPT KIMIA TING. 5 (2017) KERTAS 3

Able to state the idea of operational definition

1

Sample answer: The harder the block, the smaller the dent Semakin keras blok, semakin kecil lekuk No response or wrong response

Question Mark Scheme 1(f) Able to state one observation correctly

0

Marks 3

Sample answer: Depth of dent formed on copper block is deeper // Kedalaman lekuk yang terbentuk pada blok kuprum lebih dalam / besar // Depth of dent formed on brass block is shallower // Kedalaman lekuk yang terbentuk pada blok loyang lebih cetek / kecil // Size of dent formed on copper block is bigger than brass block Saiz lekuk yang terbentuk pada blok kuprum lebih besar berbanding blok loyang // Able to state one observation less correctly

2

Sample answer: Depth of dent formed on copper block is deep // Kedalaman lekuk yang terbentuk pada blok kuprum dalam / besar // Depth of dent formed on brass block is shallow // Kedalaman lekuk yang terbentuk pada blok loyang cetek / kecil // Size of dent formed on copper block is big // Saiz lekuk yang terbentuk pada blok kuprum besar //

Size of dent formed on brass block is small // Saiz lekuk yang terbentuk pada blok loyang kecil //

4

SKEMA MARKAH

PPT KIMIA TING. 5 (2017) KERTAS 3

Able to state the idea of observation

1

Sample answer: Depth of dent formed is different // Kedalaman lekuk yang terbentuk berbeza // Size of dent formed is different // Saiz lekuk yang terbentuk berbeza // No response or wrong response

Question Mark Scheme 1(g) Able to state correct inference based on the observation in 1(f)

0

Marks 3

Sample answer: 1. Copper is less hard than brass Kuprum kurang keras berbanding loyang // 2. Arrangement of copper atoms of the same size is closely packed and in orderly manner Susunan atom kuprum yang sama saiz ialah tersusun rapat dan padat // 3. Layers of copper atoms easily slide when force is applied Lapisan atom kuprum mudah menggelongsor apabila daya dikenakan // 4. Brass is harder than copper // Loyang lebih keras berbanding kuprum// 5. Zinc / foreign atoms disrupt the orderly manner of copper atoms in brass // Susunan atom zink / asing mengganggu susunan atom kuprum dalam loyang // 6. Layers of copper and zinc atoms do not easily slide when force is applied // Lapisan atom kuprum dan zink tidak mudah menggelongsor apabila daya dikenakan //

5

SKEMA MARKAH

PPT KIMIA TING. 5 (2017) KERTAS 3

Able to state inference less correctly

2

Sample answer 1. Brass is harder Loyang lebih keras // 2. Hardness of brass is higher Kekerasan loyang lebih tinggi // 3. Copper is less hard Kuprum kurang keras Able to state the idea of inference

1

Sample answer 1. Brass is hard Loyang keras // 2. Copper is soft Kuprum lembut // 3. Hardness of blocks is different Kekerasan blok berbeza No response or wrong response

Question Mark Scheme 1(h) Able to explain the arrangement of particles in the materials correctly [must have comparison with all 3 points]

0

Marks 3

Sample answer: Copper Kuprum 1. Atomic size of copper (atoms) are the same Saiz atom kuprum adalah sama

Brass Loyang 1. Atomic size of zinc / foreign atoms and copper are different Saiz atom zink / asing dan kuprum berbeza 2. Atoms are closely packed and 2. Presence of zinc / foreign in orderly manner atoms disrupt the orderly Atom tersusun rapat dan arrangement of copper atoms padat Kehadiran atom zink / asing mengganggu susunan teratur 6

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3. Layers of atoms slide easily when force is applied Lapisan atom mudah menggelongsor apabila daya dikenakan

Question 1(i)

PPT KIMIA TING. 5 (2017) KERTAS 3

atom zink 3. Layers of atoms do not slide easily when force is applied Lapisan atom sukar menggelongsor apabila daya dikenakan

Able to compare 2 points correctly // able to state 3 points on copper / brass without comparing

2

Able to compare 1 point correctly // able to state any 2 points on copper / brass without comparing

1

No response or wrong response

0

Mark Scheme Able to predict the diameter of dent correctly

Marks 3

Sample answer: 1.3 cm // 1.2 cm // 1.1 cm // 1.0 cm Able to predict the diameter of dent less correctly

2

Sample answer: Less than 1.4 cm // *any value below 1.0 cm (e.g: 0.9 cm, 0.8 cm etc) // answer within the range but without unit (e.g: 1.3, 1.2 etc) Able to predict the diameter of dent less correctly without unit

1

Sample answer: Less than 1.4 // *any value below 1.0 (e.g: 0.9, 0.8 etc) No response or wrong response

0

7

SKEMA MARKAH

PPT KIMIA TING. 5 (2017) KERTAS 3

Question Mark Scheme 1(j) Able to classify all six substances into alloy and pure metals correctly Alloy / Aloi Duralumin / Duralumin Pewter / Piuter

Marks 3

Pure metal / Logam tulen Magnesium / Magnesium Tin / Timah Manganese / Mangan Gold / Emas

Able to classify any four substances correctly

2

Able to classify any two substances correctly

1

No response or wrong response

0

Question Mark Scheme 1(k) Able to relate the observations and time correctly for both spoons

Marks 3

Sample answer: The longer the time, the more brown metal formed on the iron spoon while steel spoon remains unchanged Semakin lama / panjang masa, semakin banyak pepejal perang terbentuk pada sudu besi manakala tiada perubahan pada sudu keluli Able to relate the observations and time less accurately with comparison

2

Sample answer: Iron spoon corrodes / rusts while steel spoon does not corrode / rust / remains unchanged Sudu besi berkarat manakala sudu keluli tidak berkarat / berubah Able to relate the observations and time less accurately without comparison

1

Sample answer: Iron spoon corrodes / rusts Sudu besi berkarat // Steel spoon does not corrode / rust / remains unchanged Sudu keluli tidak berkarat / berubah

8

SKEMA MARKAH

PPT KIMIA TING. 5 (2017) KERTAS 3

No response given or wrong response

Question Mark Scheme 2(a) Able to state the problem statement correctly

0

Marks 3

Sample answer: What is the substance / chemical required to retain latex in liquid form?

Apakah bahan / bahan kimia yang diperlukan untuk mengekalkan lateks dalam keadaan cecair?

Able to state the problem statement

2

Sample answer: What is the substance / chemical required to retain latex?

Apakah bahan / bahan kimia yang diperlukan untuk mengekalkan lateks? // To investigate the substance required to retain latex in liquid form.

Untuk menyiasat bahan yang diperlukan untuk mengekalkan lateks dalam keadaan cecair.

Able to state an idea of the problem statement

1

Sample answer: Can alkali retain latex from coagulating?

Bolehkah alkali menghalang lateks daripada menggumpal?

No response given or wrong response

Question Mark Scheme 2(b) Able to state all the variables correctly

0

Marks 3

Sample answer: Manipulated: Presence of ammonia (solution) // Substance added to latex Kehadiran (larutan) ammonia // Bahan yang ditambah ke dalam lateks Responding: Condition of latex // Ability of latex to coagulate Keadaan lateks // Kebolehan lateks untuk menggumpal Fixed: Volume of latex // Time duration of the experiment Isi padu lateks // Masa menjalankan eksperimen Able to state any two variables correctly

2

9

SKEMA MARKAH

PPT KIMIA TING. 5 (2017) KERTAS 3

Able to state any one variable correctly

1

No response given or wrong response

0

Question Mark Scheme 2(c) Able to state the relationship between the manipulated variable and the responding variable with direction correctly

Marks 3

Sample answer: If ammonia (solution) is present, latex will not coagulate Jika (larutan) ammonia hadir, lateks tidak akan menggumpal // If ammonia (solution) is present, latex remain in liquid form Jika (larutan) ammonia hadir, lateks akan kekal dalam keadaan cecair Able to state the relationship between the manipulated variable and the responding variable with direction but less correctly.

2

Sample answer: If alkali is present, latex will not coagulate Jika alkali hadir, lateks tidak akan menggumpal // If alkali is present, latex remains in liquid form Jika alkali hadir, lateks kekal dalam keadaan cecair Able to give an idea of hypothesis

1

Sample answer: If alkali is present, latex remains Jika alkali hadir, lateks kekal No response given or wrong response

0

Question Mark Scheme 2(d) Able to list materials and apparatus completely

Marks 3

Sample answer: 1. Latex Lateks 2. Ammonia (solution) (Larutan) ammonia 3. Beaker Bikar 4. Glass rod 10

SKEMA MARKAH

PPT KIMIA TING. 5 (2017) KERTAS 3

Rod kaca 5. Measuring cylinder Silinder penyukat Able to list materials and apparatus

2

Sample answer: 1. Latex Lateks 2. Ammonia (solution) (Larutan) ammonia 3. Beaker Bikar 4. Glass rod Rod kaca Able to give an idea of materials and apparatus

1

Sample answer: 1. Latex Lateks 2. Chemical Bahan kimia 3. Beaker Bikar No response given or wrong response

Question Mark Scheme 2(e) Able to state all steps of procedure correctly

0

Marks 3

Sample answer: 1. Put [20 – 250 cm3] of latex into a beaker Masukkan [20 – 250 cm3] lateks ke dalam bikar 2. Add [5 - 20 cm3] of ammonia (solution) into the beaker Tambah [5 - 20 cm3] (larutan) ammonia ke dalam bikar 3. Stir Kacau 4. Leave the beaker for [3 - 24 hours] Tinggalkan bikar selama [3 - 24 jam] 5. Observe the condition of latex Perhatikan keadaan lateks 6. Repeat steps 1 – 5 without adding ammonia (solution) Ulang langkah 1 – 5 tanpa menambah (larutan) ammonia

11

SKEMA MARKAH

PPT KIMIA TING. 5 (2017) KERTAS 3

Able to state steps 1, 2, 4 and 5

2

Able to state steps 1, 2, 4

1

No response given or wrong response

0

Question Mark Scheme 2(f) Able to construct a table that consists of: 1. Headings for manipulated and responding variables 2. Complete list of carboxylic acid & alcohol

Marks 2

Sample answer: Presence of ammonia Kehadiran ammonia Present / Yes Hadir / Ya Absent / No Tiada

Condition of latex // Observation Keadaan lateks // Pemerhatian

Able to construct a table that consists of: 1. Headings for manipulated and responding variables

1

Sample answer: Presence of ammonia Kehadiran ammonia

Condition of latex // Observation Keadaan lateks // Pemerhatian

No response given or wrong response

0

END OF MARK SCHEME SKEMA MARKAH TAMAT

Disediakan oleh:

Disemak oleh:

Disahkan oleh:

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

(CIK INTAN ZAREENA ZAHEDI)

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(PN. NURRUL ‘AINNI MD. TENI) Ketua Unit Kimia Tingkatan 6

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(PN. NORLIZA MD DERUS) Guru Kanan Sains

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