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Ujian Pengesanan Kimia Tingkatan 5

Total questions: 50

Worksheet time: 25mins

Name
Class
Date
1.

Persamaan di bawah menunjukkan tindak balas alkena

The equation below shows a reaction of alkene


CH3CH=CH2 + Y → CH3CH2CH2Br


Antara yang berikut, yang manakah Y?

Which of the following is Y?

a)

Bromin, Br2

Bromine, Br2

b)

Hidrogen bromida, HBr

Hydrogen bromide, HBr

c)

Natrium bromida, NaBr

Sodium bromide, NaBr

d)

Magnesium bromida, MgBr2

Magnesium bromide, MgBr2

2.

Manakah formula molekul bagi hidrokarbon tak tepu?

Which of the molecular formula is unsaturated hydrocarbon?

a)

C3H6

b)

C4H10

c)

C5H12

d)

C6H14

3.

Propena boleh ditukar kepada propanol melalui proses

Propene can be change to propanol by the process of

a)

Pengoksidaan

Oxidation

b)

Penghidratan

Hydration

c)

Penapaian

Fermentation

d)

Penghidrogenan

Hydrogenation

4.

Antara yang berikut, yang manakah benar tentang hidrokarbon?

Which of the following is true about hydrocarbon?

a)

Hidrokarbon adalah sebatian organik tepu

Hydrocarbons are saturated organic compounds

b)

Hidrokarbon mengandungi hidrogen dan karbon sahaja

Hydrocarbons contain hydrogen and carbon only

c)

Hidrokarbon adalah larut di dalam pelarut tak organik.

Hydrocarbons are soluble in inorganic solvents

d)

Hidrokarbon adalah semua sebatian organik.

Hydrocarbons are all organic compounds

5.

Manakah antara berikut adalah formula am bagi alkana?Which of the following is the general formula of an alkane?

a)

CnH2n

b)

CnH2n+1

c)

CnH2n+2

d)

CnH2n+1OH

6.

Persamaan kimia berikut mewakili pembakaran lengkap etana.

The following chemical equation represents the complete combustion of ethane.


2C2H6 (g) + 7O2 (g) → 4CO2 (g) + 6H2O (l)


Berapakah isipadu minimum gas oksigen yang diperlukan untuk pembakaran lengkap 1 mol gas etana pada keadaan bilik?

What is the minimum volume of oxygen gas needed to burnt 1 mol of ethane gas completely at room condition?


1 mol gas etana memenuhi 24dm3 pada keadaan bilik

[ 1 mol of gas occupying 24 dm3 at room condition ]

a)

24 dm3

b)

48 dm3

c)

84 dm3

d)

168 dm3

7.

Why is the combustion flame of hexene, C6H12 more sooty than that of hexane, C6H14 ?

Mengapakah nyalaan pembakaran heksena, C6H12 lebih berjelaga daripada heksana, C6H14?

a)

The percentage of carbon by volume of hexene is higher compared to the percentage of carbon by volume of hexane

Peratus karbon perisipadu heksena lebih tinggi berbanding peratus karbon perisipadu heksana

b)

The percentage of carbon by mass of hexene is higher compared to the percentage of carbon by mass of hexane

Peratus karbon perjisim heksena lebih tinggi berbanding peratus karbon perjisim heksana

c)

The percentage of hydrogen by mass of hexene is higher compared to the percentage of hydrogen by mass of hexane

Peratus hidrogen perjisim heksena lebih tinggi berbanding peratus hidrogen perjisim heksana

d)

The percentage of hydrogen by volume of hexene is higher compared to the percentage of hydrogen by volume of hexane

Peratus hidrogen perisipadu heksena lebih tinggi berbanding peratus hidrogen perisipadu heksana

8.

Apakah nama sebatian itu berdasarkan penamaan IUPAC?

What is the name of the compound based on IUPAC nomenclature?

a)

Pent-2-ena

Pent-2-ene

b)

2-metilbut-1-ena

2-methylbut-1-ene

c)

2-metilbut-2-ena

2-methylbut-2-ene

d)

3-metilbut-2-ena

3-methylbut-2-ene

9.
a)

A

b)

B

c)

C

d)

D

10.

Apakah gas Y?

What is gas Y?

a)

Etana

Ethane

b)

Etena

Ethene

c)

Metana

Methane

d)

Karbon Dioksida

Carbon Dioxide

11.
a)

A

b)

B

c)

C

d)

D

12.
a)

A

b)

B

c)

C

d)

D

13.
a)

A

b)

B

c)

C

d)

D

14.
a)

A

b)

B

c)

C

d)

D

15.
a)

A

b)

B

c)

C

d)

D

16.

What is the general formula for carboxylic acid?

Apakah formula am asid karboksilik?

a)

CnH2n+2

b)

CnH2n+1OH

c)

CnH2n+1COOH

d)

CnH2n+1COOCmH2m+1

17.

Which is the method used to prepare ethanoic acid in laboratory?

Kaedah yang manakah digunakan untuk menyediakan asid etanoik dalam makmal?

a)

Fermentation

Penapaian

b)

Catalytic hydration

Penghidratan bermangkin

c)

Oxidation of alcohol

Pengoksidaan alkohol

d)

Addition of water

Penambahan air

18.

Diagram 5 shows the processes of making ethanoic acid. Which of the following processes are correctly matched?

Rajah 5 menunjukkan satu proses dalam pembuatan asid etanoik. Antara proses berikut, yang manakah dipadankan dengan betul?

a)

X - Oxidation, Y - Cracking

X - Pengoksidaan, Y - Peretakan

b)

X - Fermentation, Y - Oxidationn

X - Penapaian, Y - Pengoksidaan

c)

X - Fermentation, Y - Addition

X - Penapaian, Y - Penambahan

d)

X - Esterification, Y - Fermentation

X - Pengesteran, Y - Penapaian

19.

Substance Y produced in Figure 8 is

Bahan Y yang dihasilkan dalam Rajah 8 ialah

a)

ethene

etena

b)

propanol

propanol

c)

ethanoic acid

asid etanoik

d)

ethyl ethanoat

etil etanoat

20.

Compound P reacts with ethanol in the presence of concentrated sulphuric acid to form a sweet smelling liquid. Which of the following structures might represent compound P?

Sebatian P bertindak balas dengan etanol dengan kehadiran asid sulfurik pekat untuk menghasilkan cecair berbau manis. Antara struktur berikut, yang manakah paling mungkin mewakili sebatian P?

a)
b)
c)
d)
21.
a)

A

b)

B

c)

C

d)

D

22.

The energy level diagram represents

Gambar rajah aras tenaga mewakili

a)

exothermic reaction/ tindak balas eksotermik

b)

endothermic reaction/ tindak baals endotermik

23.

A chemical reaction that absorbs heat from the surroundings is said to be __________ and has a __________ΔH at constant pressure


Tindakbalas kimia yang menyerap haba daripada persekitaran ialah dikenali sebagai ____________ dan mempunyai ΔH yang _____________ pada tekanan malar

a)

endothermic; positive

endotermik, positif

b)

endothermic; negative

endotermik , negatif

c)

exothermic; negative

eksotermik , negatif

d)

exothermic; positive

eksotermik , positif

24.

60 cm3 silver nitrate solution 0.25 mol dm-3 react with 60 cm3 potassium bromide solution 0.25 mol dm-3 with average temperature is 29oC.Yellow precipitate is formed and the highest temperature is 32oC.Determine heat of reaction, ΔH.

60 cm3 larutan argentum nitrat 0.25 mol dm-3 bertindak balas dengan 60 cm3 larutan kalium bromida 0.25 mol dm-3 dengan suhu purata 290C. Mendakan kuning terbentuk dan suhu tertinggi dicapai ialah 320C. Tentukan haba tindak balas, ΔH.

a)

1512 J mol-1

b)

100.8 J mol -1

c)

100.8 kJ mol-1

25.

When solid sodium hydroxide dissolve in water, temperature increase from 26 oC to 38oC.Which of these statements is true about the reaction?


Apabila pepejal natrium hidroksida larut dalam air, suhu akan meningkat dari 26 °C kepada 38 °C. Antara pernyataan yang berikut, manakah benar tentang tindak balas itu?

a)

Heat energy from the system loss to the surrounding

Tenaga haba dari sistem hilang ke persekitaran.

b)

Heat energy turn to chemical energy

Tenaga haba bertukar kepada tenaga kimia.

c)

The solution gain heat energy from the surrounding

Larutan itu mendapat tenaga haba dari persekitaran.

d)

It is endothermic reaction

Ia adalah satu tindak balas endotermik

26.

Which pair produces the highest heat of neutralisation?

Pasangan manakah yang menghasilkan haba peneutralan paling tinggi?

a)

Methanoic acid and sodium hydroxide solution

Asid metanoik dan larutan natrium hidroksida

b)

Sulphuric acid and potassium hydroxide solution

Asid sulfurik dan larutan kalium hidroksida

c)

Hydrochloric acid and potassium hydroxide solution

Asid hidroklorik dan larutan kalium hidroksida

d)

Ethanoic acid and sodium hydroxide solution

Asid etanoik dan larutan natrium hidroksida

27.
a)

A

b)

B

c)

C

d)

D

28.

a)

A

b)

B

c)

C

d)

D

29.

The heat of neutralisation between sodium hydroxide solution and hydrochloric acid is △H = -57.3 kJ mol-1

Which of the following energy level diagrams represents the reaction?

Haba peneutralan antara larutan natrium hidroksida dan asid hidroklorik adalah △H = -57.3 kJ mol-1

Antara rajah aras tenaga berikut, yang manakah mewakili tindak balas tersebut?

a)
b)
c)
d)
30.

Diagram 15 shows the set-up of apparatus to determine heat of combustion of ethanol.

Rajah 15 menunjukkan susunan radas untuk menentukan haba pembakaran etanol.


DIAGRAM 15

The heat of combustion of ethanol was found less than the theoretical value. What can be done to improve the experimental value?

Haba pembakaran etanol didapati kurang dari nilai teori. Apa yang perlu dilakukan untuk memperbaiki nilai eksperimen tersebut?


I Remove the wooden block

Keluarkan blok kayu

II Use copper container to replace beaker

Gunakan bekas kuprum menggantikan bikar

III Do not use wire gauze when heating

Tidak menggunakan kasa dawai semasa pemanasan

IV Use greater volume of water

Menggunakan isipadu air yang lebih besar

a)

A II and III only

b)

B I, II and III only

c)

C II, III and IV only

d)

D I, II, III and IV

31.

The following thermochemical equation shows the formation of lead (II) sulphate.

Persamaan termokimia berikut menunjukkan pembentukan plumbum (II) sulfat.

(REFER DIAGRAM GIVEN)


Which of the following statements is true regarding the reaction?

Antara penyataan berikut manakah benar mengenai tindak balas tersebut?


I White precipitate is formed

Mendakan putih terbentuk

II Reaction is exothermic

Tindak balas adalah eksotermik

III Temperature decreases during the reaction

Suhu berkurangan semasa tindak balas

IV The heat released when 0.2 mole of lead(II) ions react is 10.0 kJ

Haba yang terbebas apabila 0.2 mol ion plumbum(II) bertindak balas ialah 10.0 kJ

a)

A I and III

b)

B II and IV

c)

C I, II and IV

d)

D II, III and IV

32.

The heat of combustion for propanol, C3H7OH is – 2016 kJ mol-1. When 0.3 g of propanol is completely burnt, the heat given out is used to heat 250 cm3 of water. What is the rise in temperature for the water?

[Specific heat capacity of water = 4.2 J g-1 oC-1. Molar mass of propanol = 60 g mol-1]

Haba pembakaran propanol, C3H7OH adalah - 2016 kJ mol-1. Apabila 0.3 g propanol terbakar lengkap, haba yang dibebaskan digunakan untuk memanaskan 250 cm3 air.

Apakah kenaikan suhu air?

[Muatan haba tentu air = 4.2 J g-1 oC-1. Jisim molar propanol = 60 g mol-1]

a)

A 2.4oC

b)

B 4.8oC

c)

C 9.6oC

d)

D 19.2oC

33.

The following thermochemical equation represents the displacement of silver by zinc..
Persamaan termokimia berikut mewakili penyesaran argentum oleh zink.

Zn + 2 AgNO3   →\rightarrow      Zn(NO3)2 +  2 Ag          ∆H = -360 kJ 

What is the mass of zinc required to release 60.0 kJ of heat?
[ Relative atomic mass: Zn= 65]
Apakah jisim zink yang diperlukan untuk membebaskan 60.0 kJ haba?
[Jisim atom relatif: Zn= 65]

a)

A         6.0 g    

b)

B         8.1 g    

c)

C         10.8 g 

d)

D         18.0 g

34.
a)

0.025 ℃

b)

0.25 ℃

c)

2.5 ℃

d)

25 ℃

35.

a)

21.09 kJ

b)

26.04 kJ

c)

52.08 kJ

d)

147.6 kJ

36.

a)

0.74 g

b)

0.78 g

c)

0.97 g

d)

1.95 g

37.

a)

- 0.42 kJ mol-1

b)

- 0.48 kJ mol-1

c)

- 4.20 kJ mol-1

d)

- 4.80 kJ mol -1

38.

60 cm3 silver nitrate solution 0.25 mol dm-3 react with 60 cm3 potassium bromide solution 0.25 mol dm-3 with average temperature is 29oC.Yellow precipitate is formed and the highest temperature is 32oC.Determine heat of reaction, ΔH.

60 cm3 larutan argentum nitrat 0.25 mol dm-3 bertindak balas dengan 60 cm3 larutan kalium bromida 0.25 mol dm-3 dengan suhu purata 290C. Mendakan kuning terbentuk dan suhu tertinggi dicapai ialah 320C. Tentukan haba tindak balas, ΔH.

a)

1512 J mol-1

b)

100.8 J mol -1

c)

100.8 kJ mol-1

39.

The following are examples of Exothermic reactions except

Berikut merupakan contoh tindak balas eksotermik kecuali

a)

Combustion/ Pembakaran

b)

Oxidation of metal/ Pengoksidaan logam

c)

Photosynthesis/ Fotosintesis

d)

Respiration/ Respirasi

40.

The table above shows the observation. State the types of reaction for X and Y.

Jadual di atas menunjukkan pemerhatin. Nyatakan jenis tindak balas bagi X dan Y.

a)

X -> Exothermic, Y --> Endothermic

X -> Eksotermik, Y --> Endotermik

b)

X -> Endothermic, Y --> Exothermic

X -> Endotermik, Y --> Eksotermik

c)

X -> Exothermic, Y --> Exothermic

X -> Eksotermik, Y --> Eksotermik

d)

X -> Endothermic, Y --> Endothermic

X -> Endotermik, Y --> Endotermik

41.
a)
A
b)
B
c)
C
d)
D
42.
a)

A

b)

B

c)

C

d)

D

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.

Rajah di atas menunjukkan formula struktur bagi suatu sebatian. Apakah nama IUPAC bagi sebatian itu?

a)

A. 2-etilpent-4-ena

b)

B. 2-etilpent-1-ena

c)

C. 2,3-dimetilpent-4-ena

d)

D. 2,4-dimetilpent-1-ena

50.
a)

A

b)

B

c)

C

d)

D

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