UP2 (2018) - ANSWER

ANSWER SCHEME

1

UP2 KIMIA TING. 4 (2018)

a: accept ; r: reject ; adp: avoid double penalty ; wcr: wrong cancels right ; ecf: error carried forward ; bod: benefit of doubt 1. D

2. D

3. A

4. A

5. B & D

6. B

7. B

8. B

9. C

10. C

Question 11 (a)

Answer

Marks

(i)

Yes / Ya / Can / Boleh

1

(ii)

There are free moving ions Terdapat ion-ion yang bebas bergerak

1

(iii) Pb2+ + 2e → Pb (b)

1

+

-

(i)

Silver ion / Ag / ion argentum, nitrate ion / NO3 / ion nitrat, hydrogen ion / H+ / ion hidrogen, hydroxide ion / OH- / ion hidroksida

1

(ii)

Grey solid / metal is deposited // Pepejal / logam kelabu terenap

1

(iii) Silver (metal / atom) is formed // (Logam / atom) argentum terbentuk

1

(iv) 1. Insert / Put a glowing wooden splinter into the test tube (containing the gas).

Masukkan / Letakkan kayu uji berbara ke dalam tabung uji (yang mengandungi gas itu).

2. Splinter ignites / rekindles / lights up, (confirming the presence of oxygen gas.

Kayu uji menyala, (mengesahkan kehadiran gas oksigen).

1

(v)

1 1

1. Electrode L becomes thinner Elektrod L menjadi nipis 2. Silver is a reactive electrode, therefore it will release / donate electron // Argentum ialah elektrod reaktif, oleh itu argentum akan menderma / melepaskan elektronnya.

TOTAL

Question 12 (a)

N +

Marks 1

(i)

H

1

(ii)

2H+ + 2e → H2

1

(iii) Hydrogen / Hidrogen r: incorrect spelling / H2

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1

Na+, Cl-, H+, OH-

(b) (c)

Answer

1

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ANSWER SCHEME

(d)

2

(iv) 1. Put / Place a burning wooden splinter at the mouth of the test tube (containing the gas).

Letakkan kayu uji menyala pada mulut tabung uji (yang mengandungi gas itu).

2. ‘Pop’sound is heard (confirming the gas is hydrogen).

Bunyi ‘pop’ kedengaran, (mengesahkan kehadiran gas hidrogen).

1

(i)

Yellow / yellowish-green / greenish yellow gas released Gas kuning / kuning kehijauan / hijau kekuningan terbebas

1

(ii)

1. Concentration of chloride ion / Cl- is higher than hydroxide ion / OHKepekatan ion klorida / Cl- lebih tinggi berbanding ion hidroksida / OH2. Chloride ion / Cl- is discharged to form chlorine molecule / Cl2 Ion klorida / Cl- dinyahcas membentuk molekul klorin / Cl2 // Chloride ion / Cl- donates / releases electron to form chlorine molecule / Cl2 Ion klorida / Cl- menderma / melepaskan elektron membentuk molekul klorin / Cl2

1

TOTAL

10

Question 13

(a) (b)

(c)

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UP2 KIMIA TING. 4 (2018)

Answer

1

1

Marks

(i)

Becomes thinner / menjadi nipis

1

(ii)

Cu → Cu

1

(i)

Becomes thicker / menjadi tebal // brown solid deposited / pepejal perang terenap

1

(ii)

Cu2+ + 2e → Cu

1

1. Blue colour of copper(II) sulphate solution remains the same Warna biru larutan kuprum(II) sulfat kekal sama 2. Concentration of copper(II) ion / Cu2+ remains the same Kepekatan ion kuprum(II) / Cu2+ kekal sama 3. Because the rate of copper donating electrons to become copper(II) ion at the anode is equal to the rate of copper(II) ion receiving / accepting electrons to form copper (atom / solid / metal) Kerana kadar kuprum menderma elektron menjadi ion kuprum(II) di anod sama dengan kadar ion kuprum(II) menerima elektron membentuk (atom / pepejal / logam) kuprum.

1

2+

+ 2e

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ANSWER SCHEME

3

UP2 KIMIA TING. 4 (2018)

1. Anode – Copper / Argentum Anod – Kuprum / Argentum 2. Cathode – Iron key Katod – Kunci besi 3. Electrolyte – Copper(II) nitrate solution / Copper(II) sulphate solution / Copper(II) chloride solution / Argentum nitrate solution Elektrolit – Larutan kuprum(II) nitrat / Larutan kuprum(II) sulfat / Larutan kuprum(II) klorida / Larutan argentum nitrat

(d)

1

1

Sample answer

TOTAL Question 14 (a)

Answer

Marks

(i)

Allow the movement of ions Membenarkan ion-ion mengalir (melalui elektrolit)

1

(ii)

(Dilute) sulphuric acid / asid sulfurik (cair) // Potassium chloride solution / larutan kalium klorida // Sodium chloride solution / larutan natrium klorida // Potassium nitrate solution / larutan kalium nitrat

1

(iii)

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1

(iv)

Cu → Cu2+ + 2e

1

(v)

Becomes thinner / menjadi nipis

1

(vi)

Ag+ + e → Ag

1

(vii)

Grey solid / metal deposited // Pepejal / logam kelabu terenap

1

© 2018 Hak Cipta Panitia Kimia SMK Sultan Yussuf

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ANSWER SCHEME

4

UP2 KIMIA TING. 4 (2018)

(viii) Chemical energy → electrical energy Tenaga kimia → tenaga elektrik (b)

1

(i)

Increases / becomes higher Meningkat / menjadi lebih tinggi

1

(ii)

Zinc is more electropositive than copper Zink lebih elektropositif daripada kuprum // Distance between zinc and silver is bigger than distance between copper and silver in the electrochemical series Jarak antara zink dengan argentum lebih jauh berbanding jarak antara kuprum dengan argentum dalam siri elektrokimia R: zinc is higher than copper / zink lebih tinggi daripada kuprum

1

TOTAL

10

END OF ANSWER SCHEME SKEMA JAWAPAN TAMAT

Disediakan oleh:

Disemak oleh:

Disahkan oleh:

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

(CIK INTAN ZAREENA ZAHEDI)

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

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

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

(PN. NORLIZA MD DERUS) Guru Kanan Sains

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