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Redox/Tindakbalas Redoks

Total questions: 149

Worksheet time: 2hrs 39mins

Name
Class
Date
1.

a)

A

b)

B

c)

C

d)

D

2.

a)

A

b)

B

c)

C

d)

D

3.

a)

A

b)

B

c)

C

d)

D

4.

a)

A

b)

B

c)

C

d)

D

5.

a)

A

b)

B

c)

C

d)

D

6.

a)

A

b)

B

c)

C

d)

D

7.

a)

A

b)

B

c)

C

d)

D

8.

a)

A

b)

B

c)

C

d)

D

9.

a)

A

b)

B

c)

C

d)

D

10.

a)

A

b)

B

c)

C

d)

D

11.

a)

A

b)

B

c)

C

d)

D

12.

a)

A

b)

B

c)

C

d)

D

13.

a)

Kuprum(I) oksida, +1

b)

Kuprum (I) oksida, +2

c)

Kuprum (II) oksida, +1

d)

Kuprum(II) oksida, +2

14.

a)

A

b)

B

c)

C

d)

D

15.

a)

A

b)

B

c)

C

d)

D

16.

a)

A

b)

B

c)

C

d)

D

17.

a)

A

b)

B

c)

C

d)

D

18.

a)

+2 kepada +6

b)

+3 kepada +6

c)

+6 kepada +2

d)

+6 kepada +3

19.

a)

A

b)

B

c)

C

d)

D

20.

a)

A

b)

B

c)

C

d)

D

21.

a)

A

b)

B

c)

C

d)

D

22.

a)

A

b)

B

c)

C

d)

D

23.

a)

A

b)

B

c)

C

d)

D

24.

a)

A

b)

B

c)

C

d)

D

25.

a)

A

b)

B

c)

C

d)

D

26.

a)

A

b)

B

c)

C

d)

D

27.

a)

A

b)

B

c)

C

d)

D

28.

a)

A

b)

B

c)

C

d)

D

29.

a)

A

b)

B

c)

C

d)

D

30.

a)

A

b)

B

c)

C

d)

D

31.

a)

A

b)

B

c)

C

d)

D

32.

a)

A

b)

B

c)

C

d)

D

33.

a)

A

b)

B

c)

C

d)

D

34.

a)

A

b)

B

c)

C

d)

D

35.

a)

A

b)

B

c)

C

d)

D

36.

a)

A

b)

B

c)

C

d)

D

37.

a)

Kuprum(I) oksida, +1

b)

Kuprum (I) oksida, +2

c)

Kuprum (II) oksida, +1

d)

Kuprum(II) oksida, +2

38.

a)

A

b)

B

c)

C

d)

D

39.

a)

A

b)

B

c)

C

d)

D

40.

a)

A

b)

B

c)

C

d)

D

41.

a)

A

b)

B

c)

C

d)

D

42.

a)

+2 kepada +6

b)

+3 kepada +6

c)

+6 kepada +2

d)

+6 kepada +3

43.

a)

A

b)

B

c)

C

d)

D

44.

a)

A

b)

B

c)

C

d)

D

45.

a)

A

b)

B

c)

C

d)

D

46.

a)

A

b)

B

c)

C

d)

D

47.

a)

A

b)

B

c)

C

d)

D

48.

a)

A

b)

B

c)

C

d)

D

49.

What is the meaning of a redox reaction?

Apakah maksud tindak balas redoks?

a)

Reduction reaction involved gain of electron.

Tindak balas penurunan melibatkan penerimaan elektron.

b)

Oxidation reaction involved loss of electron.

Tindak balas pengoksidaan melibatkan kehilangan elektron.

c)

Both oxidation and reduction reaction occurred simultaneously

Kedua-dua tindakbalas penurunan dan pengoksidaan yang berlaku serentak.

d)

A reaction involved gaining electron and losing hydrogen.

Tindak balas melibatkan penerimaan elektron dan kehilangan hidrogen.

50.

Which of the following statements refer to oxidation?

Pernyataan yang manakah merujuk kepada pengoksidaan?


I Process of losing oxygen

Proses kehilangan oksigen

II Process of gaining hydrogen

Proses penerimaan hidrogen

III Process of losing electrons

Proses kehilangan elektron

IV Process of increasing oxidation number

Proses penambahan nombor pengoksidaan

a)

I and II only

b)

III and IV only

c)

I, II and III only

d)

I, II , III and IV

51.

Which of the following is a redox reaction?

Antara berikut yang manakah tindak balas redoks?

a)

Na2O + H2O → 2NaOH

b)

NaOH + HCl → NaCl + H2O

c)

2Na + 2H2O → 2NaOH + H2

d)

NaCl + AgNO3 → AgCl + NaNO3

52.

The ionic equation shows a redox reaction.

Persamaan ion berikut menunjukkan tindak balas redoks.


P (s) + Q2+(aq) → P2+ (aq) + Q (s)


Which of the following statement is true?

Manakah antara pernyataan berikut adalah benar?

a)

Q2+ is oxidized.

Q2+ dioksidakan

b)

P donates electrons

P menderma elektron

c)

P is an oxidizing agent

P adalah agen pengoksidaan

d)

Q2+ is a reducing agent

Q2+ adalah agen penurunan

53.

Which of the following represents the oxidation number of nitrogen in the various oxides of nitrogen?

Manakah antara berikut dapat mewakili nombor pengoksidaan bagi nitrogen di dalam pelbagai oksida nitrogen?

a)

A

b)

B

c)

C

d)

D

54.

What is the oxidation number of X in X2O32- ion?

Apakah nombor pengoksidaan bagi X dalam ion X2O32- ?

a)

+2

b)

+4

c)

-2

d)

-4

55.

The following equation shows the redox reaction between copper and silver nitrate solution.

Persamaan berikut menunjukkan tindak balas redok antara kuprum dengan larutan argentum nitrat.


Cu + 2AgNO3 → Cu(NO3)2 + 2Ag


Which of the following statements is true about this reaction?

Antara pernyataan berikut, yang manakah benar mengenai tindak balas ini?

a)

Silver ion is oxidized

Ion argentum dioksidakan

b)

Copper is the oxidizing agent

Kuprum adalah agen pengoksidaan

c)

The oxidation number of copper increases

Nombor pengoksidaan kuprum bertambah

d)

The oxidation number of nitrogen decreases

Nombor pengoksidaan nitrogen berkurang

56.

The following is an equation that represents a redox reaction.

Berikut adalah sain persamaan yang mewakili suatu tindak balas redoks.

H2S (g) + 2Fe3+ (aq) ---> 2 Fe2+ (aq) + 2H+ (aq) + S(s)

State the change in oxidation number of oxidising agent. Nyatakan perubahan nombor pengoksidaan bagi agen pengoksidaan

a)

+2

b)

+1

c)

+4

d)

-2

57.

The following is an equation that represents a redox reaction.

Berikut adalah sain persamaan yang mewakili suatu tindak balas redoks.

H2S (g) + 2Fe3+ (aq) ---> 2 Fe2+ (aq) + 2H+ (aq) + S(s)

Name the substance that undergoes oxidation in the reaction.

Namakan bahan yang mengalami pengoksidaan dalam tindak balas ini.

a)

Ferum(III)

b)

Ferum(II)

c)

hydrogen sulphate

d)

Hydrogen

58.
a)

A

b)

B

c)

C

d)

D

59.
a)

-3

b)

-2

c)

+3

d)

+2

60.
a)

0 --> +1

b)

+1 --> 0

c)

0 --> +2

d)

+2 --> 0

61.

What is the oxidation number of arsenic in K3AsO4?

a)

+3

b)

+4

c)

+5

d)

+6

62.

Which of the following factors affect the standard elecrtode potential?

a)

catalyst

b)

pressure

c)

size of metal

63.

Which of the following is NOT TRUE about the Standard Electrode Potential Series?

a)

this series is used to compare the relative strengths of oxidising agents and reducing agents

b)

the more negative the value of standard electrode potential, the stronger the power of reduction

c)

the conditions for measuring the standard electrode potential must be different

64.

Which substance is an oxidising agent?

a)

bromine water

b)

iron(II) chloride solution

c)

potassium iodide solution

65.
a)

loss of oxygen

b)

gain of hydrogen

c)

loss of electron

66.

Which of the following CANNOT occur during oxidation?

Antara berikut yang manakah TIDAK berlaku semasa proses pengoksidaan?

a)

Gain of oxygen

Menerima oksigen

b)

Donation of electron

Menderma elektron

c)

Loss of hydrogen

Kehilangan hidrogen

d)

Decrease in oxidation number

Pengurangan nombor pengoksidaan

67.

What is the meaning of reduction?

Apakah maksud penurunan?

a)

Gain of electron

Terima elektron

b)

Gain of oxygen

Terima oksigen

c)

Loss of hydrogen

Hilang hidrogen

d)

Increase in oxidation number

Penambahan nombor pengoksidaan

68.

Which of the following is a reduction reaction?

Antara yang berikut, yang manakah tindak balas penurunan?

a)

Carbon gain oxygen

Karbon menerima oksigen

b)

Zinc atom loses electron

Atom zink kehilangan elektron

c)

Hydrogen sulfide loses hydrogen

Hidrogen sulfida kehilangan hidrogen

d)

Bromine molecule gains electron

Molekul bromin menerima elektron

69.

Which of the following is an oxidation process?

Antara yang berikut, yang manakah proses pengoksidaan?

a)

Carbon dioxide loses oxygen

Karbon dioksida kehilangan oksigen

b)

A bromine atom gains an electron

Satu atom bromin menerima satu elektron

c)

A chlorine molecules gains hydrogen

Satu molekul klorin menerima hidrogen

d)

A sodium atom loses an electron

Satu atom natrium kehilangan satu elektron

70.

The following ionic equation represents a redox reaction

Persamaan ion berikut mewakili satu tindak balas redoks

Al + 3Ag+ -----> Al3+ + 3Ag

Which statement is correct?

Pernyataan manakah yang betul?

a)

Silver ion is oxidized

Ion argentum dioksidakan

b)

Silver ion is a reducing agent

Ion argentum adalah satu agen penurunan

c)

Aluminium atom undergoes oxidation

Atom aluminium mengalami pengoksidaan

d)

Aluminium atom receives electrons

Atom aluminium menerima elektron

71.

Which statement defines oxidation?

Pernyataan manakah yang mendefinisikan pengoksidaan?

a)

Increase in oxidation number

Penambahan nombor pengoksidaan

b)

Gain of hydrogen

Terima hidrogen

c)

Loss of oxygen

Hilang oksigen

d)

Gain of electron

Terima elektron

72.

Which half equations show that the reactant acts as a reducing agent?

Persamaan setengah manakah yang menunjukkan bahan tindak balas sebagai agen penurunan?

I Mg ----> Mg2+ + 2e

II Cu2+ + 2e ------> Cu

III 2Cl- -----> Cl2 + 2e

IV 2H+ + 2e -----> H2

a)

I and II

b)

I and III

c)

II and IV

d)

III and IV

73.

Mg + CuO ------->MgO + Cu

Bahan manakah adalah agen pengoksidaan?

Which substance is oxidising agent?

a)

Mg

b)

CuO

c)

MgO

d)

Cu

74.

Reduction occur when ....

Penurunan berlaku apabila....

a)

Hydrogen chloride lose hydrogen

Hidrogen klorida kehilangan hidrogen

b)

Copper(II) oxide lose oxygen

Kuprum(II) oksida kehilangan oksigen

c)

Magnesium atom release electron

Atom magnesium kehilangan elektron

d)

Zinc atom change to zinc ion

Atom zink berubah menjadi ion zink

75.

What is oxidation number of O2 molecule

Apakah nombor pengoksidaan bagi molekul O2

a)

-2

b)

0

c)

+1

d)

+2

76.

What is the oxidation number of X in XO4-

Apakah nombor pengoksidaan X dalam XO4-

a)

+4

b)

+5

c)

+7

d)

+8

77.

The following ionic equation shows the reaction between zinc and acid

Persamaan ion berikut menunjukkan tindak balas antara zink dengan asid

Zn + 2H+ -------> Zn2+ + H2

What is the change in oxidation number of hydrogen?

Apakah perubahan nombor pengoksidaan bagi hidrogen?

a)

0 to +1

b)

0 to +2

c)

+1 to 0

d)

+1 to +2

78.

What is the oxidation number of X in X2O32- ion?

Apakah nombor pengoksidaan bagi X dalam ion X2O32-?

a)

+4

b)

+2

c)

-2

d)

-4

79.

What is the oxidation number of oxygen in the thiosulphate ion, S2O32-?

Apakah nombor pengoksidaan bagi oksigen dalam ion tiosulfat , S2O32-?

a)

-3

b)

-2

c)

+2

d)

+3

80.

What is the oxidation number of chromium element in Potassium dichromate (VI) , K2Cr2O7?

Berapakah nombor pengoksidaan bagi unsur kromium dalam

kalium dikromat (VI), K2Cr2O7?

a)

+2

b)

+3

c)

+5

d)

+6

81.

Oxidation is the _________ of electrons.

Pengoksidaan ialah ____________elektron

a)

loss

Kehilangan

b)

gain

penambahan

c)

sharing

Perkongsian

d)

transfer

Pemindahan

82.

What is the oxidation number of nitrogen in N2?

Apakah nombor pengoksidaan bagi nitrogen dalam N2 ?

a)

-3

b)

0

c)

+4

d)

-1

83.

The sum of the oxidation numbers in Na2CO3 is

Jumlah nombor pengoksidaan in Na2CO3 ialah

a)

0

b)

-2

c)

+1

d)

-1

84.

Determine the oxidation number of chromate in CrO42-.

Tentukan nombor pengoksidaan bagi kromat dalam CrO42-

a)

+6

b)

0

c)

+2

d)

+3

85.

Which of the following represents reduction?

Antara berikut yang manakah mewakili penurunan?

a)

C →  CO

b)

N2 →  NH3

c)

Zn  →   Zn2+ 

d)

H2 →  H2O

86.

In the reaction Zn + 2HCl --> ZnCl2 + H2

which element, is oxidized?

Dalam persamaan Zn + 2HCl --> ZnCl2 + H2

unsur manakah telah dioksidakan?

a)

Zinc

Zink

b)

Hydrogen

Hidrogen

c)

Chlorine

Klorin

d)

None

Tiada

87.

Which statement is true:

Kenyataan manakah yang benar

Mg → Mg2+ + 2e–

a)

Mg atom gains 2 electrons

Atom Mg menerima 2 elektron

b)

Mg2+ loses 2 electrons

Mg2+ kehilangan 2 elektron

c)

Mg atom loses 1 electron

Atom Mg kehilangan 1 elektron

d)

Mg atom loses 2 electrons

Atom Mg kehilangan 2 elektron

88.

Which of the following half reactions correctly represents a reduction half reaction?

Yang manakah antara berikut mewakili persamaan setengah penurunan?

a)

Fe →Fe2+ + 2e-

b)

Pb4+ + 2e- →Pb2+

c)

2O-2 →O2 + 4e-

d)

Fe + 3e- →Fe3+

89.

Br2 + 2KI ----> 2KBr + I2

Which substance is oxidising agent?

Bahan manakah agen pengoksidaan

a)

Bromine water

Air bromin

b)

Potassium iodide

Kalium iodida

c)

Potassium bromide

Kalium bromida

d)

Iodine

Iodin

90.

Electrolyte : Concentrated Copper (II) chloride

Elektrolit : Kuprum(II) klorida pekat

Electrode : Carbon

Elektrod : Karbon

Name the ion that selectively discharged at anode

Namakan ion yang dipilih untuk dinyahcas di anod

a)

hydroxide ion

ion hidroksida

b)

Copper (II) ion

Ion Kuprum (II)

c)

Chloride ion

Ion klorida

d)

Hyrogen ion

Ion hidrogen

91.

Zn + CuSO4 ----> ZnSO4 + Cu

Which substance is oxidising agent?

Bahan manakah agen pengoksidaan?

a)

Zn

b)

Zn2+

c)

Cu

d)

Cu2+

92.

What can be observed at positive terminal?

Apakah yang boleh diperhatikan di terminal positif?

a)

Brown solid deposited

Pepejal perang terenap

b)

Copper electrode becomes thinner

Elektrod kuprum menjadi nipis

c)

Magnesium electrode become thinner

Elektrod magnesium menjadi nipis

d)

Colourless gas bubbles released

Gelembung gas tidak berwarna dibebaskan

93.

Which substance undergoes oxidation

Bahan manakah yang mengalami pengoksidaan

a)

Copper

Kuprum

b)

Copper(II) ion

Ion kuprum (II)

c)

Hydroxide ion

Ion hidroksida

d)

Hydrogen ion

Ion hidrogen

94.

What can be observed at positive terminal?

Apakah yang boleh diperhatikan di terminal positif?

a)

Purple to colourless

Ungu kepada tidak berwarna

b)

Brown to green

Perang kepada hijau

c)

Orange to green

Jingga kepada hijau

d)

Green to brown

Hijau kepada perang

95.

What is product at anode?

Apakah hasil di anod?

a)

Bromide

Bromida

b)

Lead metal

Logam plumbum

c)

Bromine

Bromin

d)

Lead(II) ion

Ion plumbum(II)

96.

Oxygen always has an oxidation number of...

Oksigen biasanya mempunyai nombor pengoksidaan....

a)
-1
b)
1
c)
2
d)
-2
97.

In the reaction

Dalam tindak balas

2Ca(s) + O2(g) --> 2CaO(s),

calcium undergoes __________

Kalsium mengalami ------------

a)

Reduction

Penurunan

b)

Synthesized

Disentesiskan

c)

Oxidation

Pengoksidaan

d)

None of the above

tiada di atas

98.

If an atom loses electrons during a chemical reaction, the atom was:

Jika satu atom kehilangan elektron semasa tindak balas kimia, atom itu

a)

Oxidized

Dioksidakan

b)

Reduced

Diturunkan

c)

Neutralized

Dineutralkan

d)

Precipitated

Dimendakkan

99.

An increase in oxidation number.

Peningkatan dalam nombor pengoksidaan

a)

more acidic

Lebih berasid

b)

reduction

penurunan

c)

less basic

Kurang berasid

d)

oxidation

Pengoksidaan

100.

What is the oxidation number of Cr in Cr2O72- ?

Apakah nombor pengoksidaan bagi Cr dalam Cr2O72-

a)

+14

b)

+6

c)

-6

d)

-14

101.

Substance that oxidizes another substance by accepting its electrons.

Bahan yang mengoksidakan bahan lain dengan menerima elektron

a)

reducing agent

Agen penurunan

b)

oxidation number

Nombor pengoksidaan

c)

combustion

Pembakaran

d)

oxidizing agent

Agent pengoksidaan

102.

Substance that reduces another substance by losing electrons.

Bahan yang menurunkan bahan lain dengan kehilangan elektron

a)

reducing agent

Agen penurunan

b)

half-reaction

Tindak balas setengah

c)

electronegative atom

Atom elektronegatif

d)

oxidizing agent

Agen pengoksidaan

103.

What is oxidation number of H in H2O?

Apakah nombor pengoksidaan bagi H dalam H2O?

a)
0
b)
-2
c)
-1
d)
+1
104.

What is oxidation number of H in CaH2?

Apakah nombor pengoksidaan H dalam CaH2?

a)
+1
b)
-1
c)
0
d)
+2
105.

What is oxidation number of O in O2 ?

Apakah nombor pengoksidaan O dalam O2?

a)
0
b)
-2
c)
+1
d)
+2
106.

Mg + CuO ------> MgO + Cu

Which substance is reducing agent?

Bahan manakah agen penurunan?

a)

Magnesium

b)

Copper(II) oxide

Kuprum(II) oksida

c)

Magnesium oxide

Magnesium oksida

d)

Copper

Kuprum

107.

Zn + CuSO4 --------> ZnSO4 + Cu

Which substance undergoes oxidation?

Bahan manakah mengalami pengoksidaan?

a)

Zinc

Zink

b)

Copper

Kuprum

c)

Copper(II) ion

Ion kuprum(II)

d)

Zinc sulphate

Zink sulfat

108.

MnO4-

What is the oxidation number of Mn?

Apakah nombor pengoksidaan bagi Mn?

a)

-6

b)

+5

c)

+7

d)

-7

109.

Choose all the statements which contain correct definitions of reduction

Pilih semua pernyataan yang betul tentang definisi penurunan

a)

the lose of oxygen

Kehilangan oksigen

b)

the lose of hydrogen

Kehilangan hidrogen

c)

the lose of electrons

Kehilangan elektron

d)

the decrease in oxidation number

Pengurangan nombor pengoksidaan

110.

Choose all the statements which are correct for an oxidising agent.

Pilih semua pernyataan yang betul bagi agen pengoksidaan

a)

gain hydrogen

pertambahan hidrogen

b)

gains oxygen

pertambahan oksigen

c)

is reduced at the end of the reaction

Diturunkan pada akhir tindakbalas

d)

accepts electrons

Menerima elektron

111.

What is the meaning of a redox reaction?

Apakah maksud tindak balas redoks?

a)

Reduction reaction involved gain of electron.

Tindak balas penurunan melibatkan penerimaan elektron.

b)

Oxidation reaction involved loss of electron.

Tindak balas pengoksidaan melibatkan kehilangan elektron.

c)

Both oxidation and reduction reaction occurred simultaneously

Kedua-dua tindakbalas penurunan dan pengoksidaan yang berlaku serentak.

d)

A reaction involved gaining electron and losing hydrogen.

Tindak balas melibatkan penerimaan elektron dan kehilangan hidrogen.

112.

Which of the following statements refer to oxidation?

Pernyataan yang manakah merujuk kepada pengoksidaan?


I Process of losing oxygen

Proses kehilangan oksigen

II Process of gaining hydrogen

Proses penerimaan hidrogen

III Process of losing electrons

Proses kehilangan elektron

IV Process of increasing oxidation number

Proses penambahan nombor pengoksidaan

a)

I and II only

b)

III and IV only

c)

I, II and III only

d)

I, II , III and IV

113.

Which of the following is a redox reaction?

Antara berikut yang manakah tindak balas redoks?

a)

Na2O + H2O → 2NaOH

b)

NaOH + HCl → NaCl + H2O

c)

2Na + 2H2O → 2NaOH + H2

d)

NaCl + AgNO3 → AgCl + NaNO3

114.

The ionic equation shows a redox reaction.

Persamaan ion berikut menunjukkan tindak balas redoks.


P (s) + Q2+(aq) → P2+ (aq) + Q (s)


Which of the following statement is true?

Manakah antara pernyataan berikut adalah benar?

a)

Q2+ is oxidized.

Q2+ dioksidakan

b)

P donates electrons

P menderma elektron

c)

P is an oxidizing agent

P adalah agen pengoksidaan

d)

Q2+ is a reducing agent

Q2+ adalah agen penurunan

115.

Which of the following represents the oxidation number of nitrogen in the various oxides of nitrogen?

Manakah antara berikut dapat mewakili nombor pengoksidaan bagi nitrogen di dalam pelbagai oksida nitrogen?

a)

A

b)

B

c)

C

d)

D

116.

What is the oxidation number of X in X2O32- ion?

Apakah nombor pengoksidaan bagi X dalam ion X2O32- ?

a)

+2

b)

+4

c)

-2

d)

-4

117.

What are halogens X, Y and Z?

Apakah halogen X, Y dan Z?

a)

A

b)

B

c)

C

d)

D

118.

Fe3+ ion in solution can be converted to Fe2+ ions by adding zinc powder. Which of the following can replace zinc powder in this reaction?

Ion Fe3+dalam larutan boleh ditukarkan kepada ion Fe2+ dengan menambahkan serbuk zink. Antara berikut, yang manakah boleh menggantikan serbuk zink di dalam tindak balas ini?

a)

Bromine water

Air Bromin

b)

Potassium iodide solution

Larutan kalium iodida

c)

Potassium hexacynaferrate(II) solution

Larutan kalium heksasianoferat (II)

d)

Acidified potassium manganate (VII) solution

Larutan kalium manganat (VII) berasid

119.

The following equation shows the redox reaction between copper and silver nitrate solution.

Persamaan berikut menunjukkan tindak balas redok antara kuprum dengan larutan argentum nitrat.


Cu + 2AgNO3 → Cu(NO3)2 + 2Ag


Which of the following statements is true about this reaction?

Antara pernyataan berikut, yang manakah benar mengenai tindak balas ini?

a)

Silver ion is oxidized

Ion argentum dioksidakan

b)

Copper is the oxidizing agent

Kuprum adalah agen pengoksidaan

c)

The oxidation number of copper increases

Nombor pengoksidaan kuprum bertambah

d)

The oxidation number of nitrogen decreases

Nombor pengoksidaan nitrogen berkurang

120.

The figure shows a chemical cell

Rajah menunjukkan satu sel kimia.


The reaction that occurs is given by the equation:

Tindak balas yang berlaku ditunjukkan melalui persamaan berikut :

Zn (s) + CuSO4 (aq) → ZnSO4 (aq) + Cu (s)

Which of the following is correct about the cell?

Manakah antara berikut adalah benar tentang sel tersebut?

a)

Hydrogen gas is produced.

Gas hidrogen terhasil

b)

Zinc is oxidized to zinc ion, Zn2+

Zink dioksidakan kepada ion zink, Zn2+

c)

Copper is oxidized to copper(II) ion, Cu2+

Kuprum dioksidakan kepada ion kuprum, Cu2+

d)

Electrons flow from the copper plate to the zinc plate.

Elektron bergerak daripada plat kuprum kepada plat zink

121.

Diagram shows the set up of the apparatus of an experiment to investigate the transfer of electrons at a distance. Solution X is an oxidising agent and turns colour from purple to colourless after a few minutes reacted.

Rajah menunjukkan susunan radas eksperimen bagi mengkaji pemindahan elektron pada satu jarak. Larutan X ialah agen pengoksidaan dan bertukar warna dari ungu kepada tidak berwarna selepas beberapa minit bertindak balas.


Which of the following is the suitable name of solution X?

Antara berikut yang manakah nama yang sesuai untuk larutan X?

a)

Iodine solution

Larutan iodin

b)

Potassium hexacyanoferrate (III) solution

Larutan kalium heksasianoferat (III)

c)

Acidified potassium dichromate (VI) solution

Larutan kalium dikromat (VI) berasid

d)

Acidified potassium manganate (VII) solution

Larutan kalium manganat (VIII) berasid

122.

Diagram shows the set up of apparatus for the experiment to investigate the transfer of electron at a distance.

Rajah menunjukkan susunan radas bagi eksperimen mengkaji pemindahan elektron pada suatu jarak.


Which direction will the electrons flow?

Ke arah manakah elektron mengalir ?

a)

From electrode N to electrode M through the galvanometer

Dari elektrod N ke elektrod M melalui galvanometer

b)

From electrode M to electrode N through the galvanometer

Dari elektrod M ke elektrod N melalui galvanometer

c)

From electrode M to electrode N through dilute sulphuric acid

Dari elektrod M ke elektrod N melalui larutan asid sulfurik cair

d)

From electrode N to electrode M through dilute sulphuric acid

Dari elektrod N ke elektrod M melalui larutan asid sulfurik cair

123.

Diagram shows the results of an experiment to investigate the effect of other metals on the rusting of iron. The iron nail is put into test tube that contain hot jelly which added with potassium hexacyanoferrate (III) solution and phenolphtalein and put aside for 1 day.

Gambarajah menunjukkan keputusan satu eksperimen untuk mengkaji kesan logam lain ke atas pengaratan besi. Paku besi tersebut diletakkan di dalam tabung uji yang mengandungi agar-agar panas yang ditambahkan dengan larutan kalium heksasianoferat (III) dan fenolftalein dan dibiarkan selama 1 hari.


Based on the result in the diagram, arrange iron, X and Y in order of increasing electropositivity.

Berdasarkan keputusan di dalam rajah tersebut, susun besi (Ferum), X dan Y mengikut turutan menaik keelektropositifannya.


a)

X, iron, Y

X, Ferum, Y

b)

Y, iron, X

Y, Ferum, X

c)

Iron, X, Y

Ferum, X, Y

d)

Iron, Y, X

Ferum, Y, X

124.

Diagram shows rusting process that occur naturally with the present of water and oxygen gas.

Rajah menunjukkan proses pengaratan besi secara semulajadi dengan kehadiran air dan gas oksigen.


Which of the following is the correct half equation that occur at the cathode?

Antara berikut, yang manakah setengah persamaan yang betul yang berlaku di katod?

a)

Fe → Fe2+ + e

b)

Fe3+ + e → Fe2+

c)

4OH- → 2H2O + O2 + 4e

d)

2H2O + O2 + 4e → 4OH-

125.

Which of the following is correct when a mixture of carbon and copper(II) oxide is heated strongly?

Antara yang berikut, yang manakah benar apabila satu campuran karbon dengan kuprum(II) oksida di panaskan dengan kuat?


I the oxide ion loses two electrons

Ion oksida melepaskan dua elektron


II the oxidation number of carbon increases from 0 to +4

nombor pengoksidaan karbon bertambah dari 0 kepada +4


III the copper(II) oxide acts as the reducing agent

Kuprum(II) oksida bertindak sebagai agen penurunan


IV the copper(II) ion accepts two electrons

Ion kuprum(II) terima dua elektron

a)

I and III

b)

II and IV

c)

II, III and IV

d)

I, II, III and IV

126.

Pengoksidaan ialah _________ elektron.

Oxidation is the _________ of electrons.

a)

loss / derma

b)

gain / terima

c)

sharing / berkongsi

d)

transfer / pindah

127.

Penurunan ialah ____________ elektron.

Reduction is the ___________ of electrons.

a)

loss / derma

b)

gain / terima

c)

sharing / berkongsi

d)

transfer / pindah

128.

Penerimaan hidrogen ialah contoh bagi ......

Gaining hydrogen is an example of...

a)

pengoksidaan/ oxidation

b)

penurunan / reduction

129.

Penerimaan oksigen ialah contoh bagi ......

Gaining oxygen is an example of...

a)

pengoksidaa / oxidation

b)

penurunan / reduction

130.

Unsur manakah dioksidakan dalam tindak balas ..

Which element is oxidised in the reaction ..

Zn + 2HCl  →\rightarrow   ZnCl2 + H2  \

a)

Zinc

b)

Hydrogen

c)

Chlorine

d)

None

131.

Penurunan berlaku pada ...

Reduction happens at the

a)

anod / anode

b)

katod / cathode

c)

titian garam/ salt bridge

d)

voltmeter

132.

Eloktrod yang kehilangan jisim ..

This electrode loses mass

a)

anod/ anode

b)

katod / cathode

133.

Adakah kalsium dioksida atau diturunkan dalam tindak balas berikut ..

Is calcium oxidized or reduced in the following reaction?

2 CaO--> 2 Ca + O2

a)

dioksida / Oxidized

b)

diturun / Reduced

134.

Yang manakah antara persamaan setengah berikut mewakili persamaan setengah bagi penurunan ?

Which of the following half reactions correctly represents a reduction half reaction?

a)

Fe →Fe2+ + 2e-

b)

Pb4+ + 2e- →Pb2+

c)

2O-2 →O2 + 4e-

d)

Fe + 3e- →Fe3+

135.

Penukaran tenaga manakah yang ditunjukkan di bawah berlaku dalam sel voltan?

Which energy conversion shown below takes place in a voltaic cell?

a)

Elektrik kepada kimia/

Electrical to chemical

b)

Mekanik kepada kimia /

Mechanical to chemical

c)

Mekanik kepada elektrik/

Mechanical to electrical

d)

Kimia kepada elektrik/

Chemical to electrical

136.

Dalam sel voltan, ion-ion bergerak melalui

In a voltaic cell the ions flow through the

a)

wayar / wire

b)

titian garam/ salt bridge

137.

Apakah yang berlaku pada katod sel elektrolisis ?

What occurs at the cathode in an electrolytic cell?

a)

pengoksidaan/ oxidation

b)

penurunan/ reduction

138.

Dalam tidak balas di bawah, kalsium di__

In the reaction

2Ca(s) + O2(g) --> 2CaO(s), calcium is __________

a)

Diturunkan / Reduced

b)

Sintesis / Synthesized

c)

Dioksidakan / Oxidized

d)

Tiada yang di atas / None of the above

139.

Unsur manakah dioksidakan?

Which element is oxidized?

H2S + Cl2 → 2HCl + S

a)

H2S

b)

S

c)

Cl

d)

Bukan tindak balas redoks /

Not a redox reaction

140.

Bahan yang mengoksidakan bahan lain dengan menerima elektron

Substance that oxidizes another substance by accepting its electrons.

a)

agen penurunan/ reducing agent

b)

nombor pengoksidaan / oxidation number

c)

ketidakseimbangan / disproportionation

d)

agen pengoksidaan / oxidizing agent

141.

Apakah nama IUPAC dan nombor pengoksidaan bagi unsur kuprum dalam sebatian Cu2O ?

What is the IUPAC name and oxidation number of copper element in the compound Cu2O?

a)

kuprum(I)oksida / Copper(I) oxide; +1

b)

kuprum(I)oksida/ Copper(I) oxide; +2

c)

kuprum(II)oksida/ Copper(II) oxide; +1

d)

kuprum(II)oksida/ Copper(II) oxide; +2

142.

Persamaan manakah mewakili tindak balas redoks?

Which equation represents a redox reaction?

a)

NaOH + HNO3 → NaNO3 +H2O

b)

2AgNO3 + Zn → Zn(NO3)2 + 2Ag

c)

2NaCl + Pb(NO3)2 → PbCl2 + 2NaNO3

d)

CaCO3 + 2HCl → CaCl2 + H2O + CO2

143.

Apakah nombor pengoksidaan bagi X dalam XO4?

What is the oxidation number of X in XO4-?

a)

+4

b)

+5

c)

+7

d)

+8

144.

Apakah nombor pengoksidaan Cr dalam Cr2O72- ?

What is oxidation number of Cr in Cr2O72-?

a)

-2

b)

+2

c)

+6

d)

+12

145.

Apakah nombor pengoksidaan Fe dalam FeO?

What is oxidation number of Fe in FeO ?

a)

+2

b)

-2

c)

0

d)

+1

146.

Jika dalam suatu tindak balas, kuprum diturunkan, bilangan elektronnya :

If in a reaction, copper is reduced; its number of electrons has:

a)

bertambah/ Increased

b)

berkurang/ Decreased

c)

tidakberubah/ Remained Constant

d)

berbeza secara rawak/ Varies Randomly

147.

Jika suatu atom kehilangan elektron semasa tindak balas kimia , atom tersebut telah :

If an atom loses electrons during a chemical reaction, the atom was:

a)

dioksidakan/ Oxidized

b)

diturunkan/ Reduced

c)

dineutralkan/ Neutralized

d)

dimendakkan/ Precipitated

148.

Dalam tindak balas di bawah, unsur manakah, jika ada telah dioksidakan?

In the reaction Zn + H2O --> ZnO2 + H2

which element, if any, is oxidized?

a)

Zinc

b)

Hydrogen

c)

Oxygen

d)

None

149.

Nama lain bagi 'pengoksidaan-penurunan' ialah

Another name for a "oxidation-reduction" reaction is

a)

tindak balas kimia/ chemical reaction

b)

tindak balas peneutralan/ neutralization reaction

c)

tindak balas redoks/ redox reaction

d)

tindak balas nuklear/ nuclear reaction

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