中五 化學試卷 (F5 Chemistry Past Paper)

編號:
6660
年級:
中五 (F5)
科目:
化學 (Chemistry)
檔案格式:
pdf
頁數:
28
檔名:
chem 2CA_S5_final_term_exam_2017_eng.doc

▼ 圖片只作預覽, 如欲下載整份卷, 請按「免費成為會員」 ▼
F5Chemistry試卷▲ 圖片只作預覽, 如欲下載整份卷, 請按「免費成為會員」 ▲




中五化學試卷 PDF 下載


下載試卷只限會員尊享





內容節錄:
S5 Final Term Exam
GENERAL INSTRUCTIONS
HONG KONG DIPLOMA OF SECONDARY EDUCATION EXAMINATION
(SECONDARY FIVE FINAL TERM
EXAMINATION PAPER)
A Periodic Table is printed on the back of Question-Answer Book B. Atomic numbers and relative
atomic masses of elements can be obtained from the Periodic Table.
Time allowed: 2 hours 30 minutes
This paper must be answered in English.
INSTRUCTIONS FOR SECTION A (MULTIPLE-CHOICE QUESTIONS)
There are TWO sections, A and B, in this Paper. You are advised to finish Section A in about 45
Section A consists of multiple-choice questions in this question paper, while Section B contains
conventional questions printed separately in Question-Answer Book B.
Answers to Section A should be marked on the Multiple-choice Answer Sheet while answers to Section
B should be written in the spaces provided in Question-Answer Book B. The Answer Sheet for Section
A and the Question-Answer Book for Section B will be collected separately at the end of the
examination.
Read carefully the instructions on the Answer Sheet. Write your name, class and class number in the
space provided.
When told to open this book, you should check that all the questions are there. Look for the words
'END OF SECTION A' after the last question.
All questions carry equal marks.
ANSWER ALL QUESTIONS. You are advised to use an HB pencil to mark all the answers on the
Answer Sheet, so that wrong marks can be completely erased with a clean rubber. You must mark the
answers clearly; otherwise you will lose marks if the answers cannot be captured.
You should mark only ONE answer for each question. If you mark more than one answer, you will
receive NO MARKS for that question.
No marks will be deducted for wrong answers.
HKDSE CHEMISTRY A Modern View (Second Edition)
Aristo Educational Press Ltd 2017
S5 Final Term Exam
S5 Final Term Exam
32. The structure of paracetamol, a common painkiller, is shown below:
(2) HCl(aq)
(3) Acidified K₂Cr₂O₂(aq)
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
(1), (2) and (3)
Which of the following reagents can react with paracetamol?
(1) NaOH(aq)
CH₂CH₂CH=CH₂
33. Consider the following reaction pathway (W, X and Y are the major organic products).
K₂Cr₂O,/H*(aq)
US IS Colicet:
W has no chiral carbon.
X is a primary alcohol.
Y has a fruity smell.
D. The boiling point of X is higher than that of Y.
HKDSE CHEMISTRY - A Modern View (Second Edition)
O Aristo Educational Press Ltd 2017
34. Iron is a transition metal. Which of the following does NOT show the characteristics of a
transition metal?
Iron can form iron(II) oxide and iron(III) oxide with oxygen.
Iron is used as a catalyst in the Haber process.
C. Iron(II) nitrate solution is green in colour.
D. Iron can be extracted by heating the oxide of iron with carbon.
S5 Final Term Exam
S5 Final Term Exam
Directions:
Both statements are true and the 2nd statement is a correct explanation of the 1st statement.
Both statements are true and the 2nd statement is NOT a correct explanation of the 1st
The 1st statement is false but the 2nd statement is true.
D. Both statements are false.
Each question below (Questions 35 and 36) consists of two separate statements.
Decide whether each of the two statements is true or false; if both are true, then
decide whether or not the second statement is a correct explanation of the first
statement. Then select one option from A to D according to the following table:
1st statement
35. 2 g of helium and 2 g of hydrogen
occupy the same volume at room
temperature and pressure.
36. Butanal and butanone give the same
product when they react with NaBH4.
HKDSE CHEMISTRY - A Modern View (Second Edition)
O Aristo Educational Press Ltd 2017
END OF SECTION A
2nd statement
g of helium and 2 g of hydrogen have the
same number of electrons.
Butanal and butanone are structural isomers.
S5 Final Term Exam
S5 Final Term Exam
HONG KONG DIPLOMA OF SECONDARY EDUCATION
EXAMINATION
(SECONDARY FIVE FINAL TERM
EXAMINATION PAPER)
SECTION B: Question-Answer Book B
This paper must be answered in English.
INSTRUCTIONS FOR SECTION B
(1) Write your name, class and class number in the space
provided on this page.
(2) Refer to the general instructions on the cover of the
Question Paper for Section A.
(3) This section consists of TWO parts, Part I and Part II.
(4) Answer ALL questions in both Parts I and II. Write
your answers in the spaces provided in this
Question-Answer Book. Do not write in the margins.
Answers written in the margins will not be marked.
(5) An asterisk (*) has been put next to the questions
where one mark will be awarded for effective
communication.
(6) Supplementary answer sheets will be provided on
request. Write your name, class, class number and
question number on the answer sheets and fasten
them with a string INSIDE this Question-Answer Book.
(7) No extra time will be given to you for filling in your
name, class and class number in the
Question-Answer Book after the 'Time
'Time is up'
announcement.
HKDSE CHEMISTRY - A Modern View (Second Edition)
O Aristo Educational Press Ltd 2017
S5 Final Term Exam
S5 Final Term Exam
Answer ALL questions. Write your answers in the spaces provided.
A student burnt octane in air and observed that the combustion of octane was incomplete.
(a) Write the skeletal formula of octane.
(b) State one observable change when the combustion of octane was incomplete.
(c) Octane is the eighth member of the alkane series. Write the general formula of the alkane
(d) Octane reacts with chlorine to form a mixture of chloroalkanes.
(i) State the reaction condition required.
(ii) Name the type of reaction involved.
HKDSE CHEMISTRY A Modern View (Second Edition)
Aristo Educational Press Ltd 2017
S5 Final Term Exam
S5 Final Term Exam
2. A student was given a sample of solid potassium chloride.
(a) Draw the electron diagram for potassium chloride, showing electrons in the outermost
shells only.
(b) The student performed the flame test using the given sample in the school laboratory.
(i) Suggest a reagent to clean the platinum wire.
(ii) State the colour of the flame.
(c) Explain why potassium chloride has a high melting point.
(d) Is it appropriate to prepare potassium chloride by the reaction between potassium and
chlorine? Explain your answer.
HKDSE CHEMISTRY A Modern View (Second Edition)
Aristo Educational Press Ltd 2017
S5 Final Term Exam
S5 Final Term Exam
3. Ammonia (NH3) and phosphine (PH3) are hydrides of Group V elements.
(a) Explain, in terms of electronic arrangement, the meaning of Group V elements.
(b) Ammonia solution reacts with nitric acid to form a salt.
(i) Name the salt formed.
(ii) Calculate the percentage by mass of nitrogen in this salt.
(Relative atomic masses: H = 1.0, N = 14.0, O = 16.0)
(c) Draw a labelled diagram to show how TWO ammonia molecules interact with each other
in liquid phase.
(d) Phosphine is a gas at room temperature and pressure.
(i) Draw the three-dimensional structure of a phosphine molecule.
HKDSE CHEMISTRY A Modern View (Second Edition)
Aristo Educational Press Ltd 2017
(ii) Predict, with explanation, whether ammonia or phosphine can be liquefied more
S5 Final Term Exam
S5 Final Term Exam
4. A piece of zinc and wet cotton wool are placed in a boiling tube. The piece of zinc is then
heated strongly. A colourless gas X is produced in the reaction.
utton wool is delivery tube
wet cotton wool
^inction of who
(b) Suggest a test for gas X and state the expected observable change.
(c) Write a chemical equation for the reaction taking place inside the boiling tube.
HKDSE CHEMISTRY A Modern View (Second Edition)
Aristo Educational Press Ltd 2017
(d) One safety precaution of this experiment is that the delivery tube should be removed from
water before heating is stopped. State the purpose of this safety precaution.
S5 Final Term Exam
S5 Final Term Exam
4. (e) Zinc can protect iron from rusting. When galvanized iron is exposed to moist air for a
period of time, it turns white due to the formation of zinc carbonate.
(i) Suggest how to show the presence of carbonate ion in the white substance. Write an
ionic equation for the reaction involved.
*(ii) Explain why a galvanized iron object does not rust easily even if the zinc layer is
HKDSE CHEMISTRY A Modern View (Second Edition)
Aristo Educational Press Ltd 2017
S5 Final Term Exam
S5 Final Term Exam
5. A student tried to prepare pure potassium sulphate crystals in the school laboratory. He
proposed the following two methods to his teacher.
(a) His teacher said that these two methods were not practical. Explain.
Mix potassium nitrate solution and sodium sulphate solution together.
Then heat the reaction mixture to obtain pure potassium sulphate crystals.
Add a piece of potassium to dilute sulphuric acid.
(b) The student then proposed a titrimetric method. He titrated dilute sulphuric acid (in conical
flask) with dilute potassium hydroxide solution (in burette). The indicator used was
phenolphthalein.
(i) State the colour change at the end point of the titration.
(ii) After the titration, the indicator was still present in the resultant solution. Suggest one
way to remove the indicator.
HKDSE CHEMISTRY A Modern View (Second Edition)
Aristo Educational Press Ltd 2017
S5 Final Term Exam
S5 Final Term Exam
5. (b) (iii) After removing the indicator, the student obtained pure potassium sulphate crystals by
the following steps. Fill in the blanks below:
Heat the solution until it becomes (1)_
room temperature to let potassium sulphate crystals form.
Filter the crystals out and wash them with a little (2)
Dry the crystals using (3)
(iv) In the titration, 25.50 cm³ of 1.2 M sulphuric acid was used. Calculate the theoretical
mass of potassium sulphate crystals obtained.
(Relative atomic masses: O = 16.0, S = 32.1, K = 39.1)
HKDSE CHEMISTRY A Modern View (Second Edition)
Aristo Educational Press Ltd 2017
Allow it to cool at
S5 Final Term Exam
S5 Final Term Exam
This section consists of two parts. There are 24 questions in PART I and 12 questions in PART
Choose the best answer for each question.
Candidates may refer to the Periodic Table printed on the back of Question-Answer Book B.
1. Which of the following substances gives a golden yellow flame in a flame test?
C. Rock salt
Which of the following substances has a simple molecular structure?
B. Sodium iodide
D. Silicon dioxide
Consider the symbol, 19 K. Which of the following statements is correct?
A. This symbol can be found in the Periodic Table.
The relative atomic mass of potassium is 39.
C. This is a symbol of a kind of potassium isotope.
D. All isotopes of potassium have 20 neutrons.
Which of the following statements about the electrolysis of molten sodium chloride is/are
(1) Sodium ions and chloride ions are mobile.
(2) Chlorine gas is produced at the cathode.
(3) Electrons flow to the anode.
A. (1) only
B. (2) only
(1) and (3) only
(2) and (3) only
HKDSE CHEMISTRY - A Modern View (Second Edition)
O Aristo Educational Press Ltd 2017
S5 Final Term Exam
S5 Final Term Exam
6. Titanium can be extracted from its ore through the following steps.
titanium ore
tanium(IV) oxide
✓iul exce
TiO₂ + 2Cl₂ →→ TiCl4 + O₂
(i) A student said that titanium(IV) oxide loses 1 titanium toms and so it is reduced.
Explain, in terms of oxidation number, why the sun view is incorrect.
HKDSE CHEMISTRY A Modern View (Second Edition)
Aristo Educational Press Ltd 2017
tanium(IV) chloride
(ii) Coke, a form of carbon, is added to remove the oxygen gas to form carbon monoxide.
Write a chemical equation for this process.
m(IV) chloride:
(b) The following equation shows the reaction involved in Step 3:
2Mg + TiC14 2MgCl₂ + Ti
With reference to the above equation, discuss the reactivity of titanium and magnesium.
S5 Final Term Exam
S5 Final Term Exam
Consider the following set-up.
electrode P electrode Q
concentrated H₂PO4
HKDSE CHEMISTRY A Modern View (Second Edition)
Aristo Educational Press Ltd 2017
electrode R
(c) With the aid of a half equation, state the observable change at electrode R.
and Q respectively.
AgNO3(aq) (2 marks)
(d) If 3.01 10²¹ electrons are passed to electrode S, calculate the mass of silver deposited on
electrode S.
(Relative atomic mass: Ag = 107.9; Avogadro constant = 6.02 × 102³ mol¯¹)
electrode S
S5 Final Term Exam
S5 Final Term Exam
8. The following equation shows the hydrolysis of urea (CO(NH₂)2).
CO(NH2)2(s)+H,O(l) → 2NH3(aq) + CO₂(aq)
The standard enthalpy changes of formation of some substances are listed below:
CO(NH2)2(aq)
(a) What is the meaning of the term 'standard enthalpy change of formation'?
(b) Calculate the standard enthalpy change of hydrolysis of urea.
AH, (kJ mol¹)
(c) Suggest why it is impossible to measure the standard enthalpy change of hydrolysis of urea
HKDSE CHEMISTRY A Modern View (Second Edition)
Aristo Educational Press Ltd 2017
END OF PARTI
S5 Final Term Exam
S5 Final Term Exam
9. A student carried out an experiment to determine the molar volume of hydrogen gas at room
temperature and pressure. The experimental set-up is shown below:
The results were
zinc granules
(c) Deduce the value of y.
hydrogen gas
Volume of 0.50 M
hydrochloric acid ICl(aq) /cm³
(a) Write an ionic equation for the reaction between zinc and hydrochloric acid.
(b) Using the data from experiment 1, calculate the molar volume of hydrogen gas at room
temperature and pressure.
(Relative atomic mass: Zn = 65.4)
HKDSE CHEMISTRY A Modern View (Second Edition)
Aristo Educational Press Ltd 2017
Volume of hydrogen
S5 Final Term Exam
S5 Final Term Exam
9. (d) The following diagram shows the result of experiment 3. Sketch, on the same graph, the
curve that can be obtained if 0.3 g of zinc powder is used instead of zinc granules.
effervescence occurs.
(i) Name the gas produced.
(ii) Name the functional group that is responsible for the effervescence.
HKDSE CHEMISTRY A Modern View (Second Edition)
Aristo Educational Press Ltd 2017
(b) Suggest why patients with high blood cholesterol levels are given suitable dose of aspirin.
irin is shown below:
with warm sodium hydrogencarbonate solution,
S5 Final Term Exam
S5 Final Term Exam
10. (c) Outline a synthetic route, with no more than three steps, to accomplish the conversion of
aspirin to wintergreen oil. For each step, give the reagent(s), reaction conditions (as
appropriate) and structure of the intermediate.
HKDSE CHEMISTRY A Modern View (Second Edition)
Aristo Educational Press Ltd 2017
wintergreen oil
S5 Final Term Exam
S5 Final Term Exam
11. Chromium is an example of transition metal. The following chart shows the inter-conversions
of different oxidation states of chromium in acidic medium:
[Cr(H₂O)]²+
[Cr(H₂O)]³+
(b) Which of the following metals can be used in Step 1? Explain your answer.
sodium, magnesium, copper
(c) Chromate ion and dichromate ion establish the following equilibrium at room temperature.
2CrO² (aq) + 2H*(aq) ⇒ Cr₂O₂²¯(aq) + H₂O(1)
(i) Write an expression for the equilibrium constant, K., of the reaction.
HKDSE CHEMISTRY A Modern View (Second Edition)
Aristo Educational Press Ltd 2017
re shown in the chart above.
(ii) Is the above conversion a redox reaction? Explain your answer.
(iii) When 20 cm³ of water is added to 20 cm³ of an orange equilibrium mixture, the
mixture changes to yellow. Explain this change using reaction quotient.
S5 Final Term Exam
S5 Final Term Exam
12. Phosphorus has several allotropes. White phosphorus (P4) is one of the allotropes.
(a) What is meant by the term 'allotrope'?
(b) When white phosphorus burns in excess oxygen, an oxide of phosphorus, X, is produced. X
contains 43.5% phosphorus by mass. Given that the molar mass of the oxide is 284 g
mol-¹, deduce the molecular formula of X.
(Relative atomic masses: O = 16.0, P= 31.0)
*(c) Describe the nature of bonding and acid-base property of X.
END OF SECTION B
HKDSE CHEMISTRY A Modern View (Second Edition)
Aristo Educational Press Ltd 2017
END OF PAPER
S5 Final Term Exam
Aristo Educational Press Ltd 2017
CHEMISTRY A Modern View (Second Edition)
S5 Final Term Exam
(223) (226)
138,9 178.5
(227) (261)
140.1 140.9
232.0 (231)
180.9 183.9
atomic number RIF
relative atomic mass 相對原子質量
PERIODIC TABLE 周期表
190.2 192.2
200.6 204.4
209.0 (209) (210)
S5 Final Term Exam
S5 Final Term Exam
5. A white solid can dissolve in water to give a colourless solution W. When several drops of
acidified silver nitrate solution were added to solution W, there is no observable change. The
white solid may be
A. sodium carbonate.
potassium nitrate.
C. lead(II) chloride.
D. magnesium chloride.
Which of the following molecules does NOT obey the octet rule?
Which of the following is the best way to prepare copper(II) sulphate solution?
H₂SO₂ (aq)
Excess CuO(s)
Cu(NO3)₂(aq)
excess H₂SO₂(aq)
Which of the following molecules is NOT linear?
A. H₂O₂
HKDSE CHEMISTRY - A Modern View (Second Edition)
O Aristo Educational Press Ltd 2017
H₂SO₂(aq)
CuSO₂(aq)
CuSO₂(aq)
In which of the following reactions is the underlined substance oxidized?
A. Fe3O4(s) + 4H₂(g) → 3Fe(s) + 4H₂O(1)
B. N₂(g) + 3H₂(g) → 2NH3(g)
CuSO₂(aq)
CuSO₂(aq)
Mg(s) + ZnSO4(aq) → MgSO4(aq) + Zn(s)
H₂O₂(aq) + H₂SO4(aq) + 2KI(aq) → K₂SO4(aq) + I₂(aq) + 2H₂O(1)
S5 Final Term Exam
S5 Final Term Exam
10. A student connected one end of two iron wires to the two poles of a 9V dry cell, and then
immersed another end of the iron wires to 0.050 M sodium chloride solution. Which of the
following statements is correct?
A. In the set-up, chemical energy was converted into electrical energy.
The mass of one of the iron wires decreased.
A green gas was produced.
The solution remained clear at the end of the experiment.
11. Which of the following statements about the particles 24Mg and 26Mg2+ is correct?
A. They are both atoms of the same element.
They have the same number of neutrons.
C. 26Mg2+ has fewer occupied electron shells than 24Mg.
24Mg can be converted to 26Mg2+ by adding hydrochloric acid.
12. The atomic numbers of elements X and Y are 9 and 11 respectively. Which of the following
statements correctly describes the compound formed from the two elements?
A. Its chemical formula is Y₂X.
B. It is a poor conductor of electricity at room temperature.
It is soluble in hexane.
D. Electrolysis of the aqueous solution of the compound gives elements X and Y.
13. Which of the following properties of Group VII elements increases down the group?
A. Electronegativity
B. Boiling point
D. Oxidizing power
Electrical conductivity
14. When 20.0 cm³ of 0.10 M Fe₂(SO4)3(aq) and 30.0 cm³ of 0.05 M FeCl3(aq) are mixed together,
what is the concentration of iron(III) ions in the resultant solution?
HKDSE CHEMISTRY - A Modern View (Second Edition)
O Aristo Educational Press Ltd 2017
S5 Final Term Exam
S5 Final Term Exam
15. There are three unlabelled bottles each containing one of the white solids below:
sodium hydrogencarbonate, calcium carbonate, anhydrous copper(II) sulphate
Which of the following methods can be used to identify each of them?
(1) Adding hydrochloric acid
(2) Performing flame test
(3) Adding water
A. (1) only
(1) and (3) only
D. (2) and (3) only
16. Both magnesium and sulphur belong to the same period in the Periodic Table. Which of the
following statements is INCORRECT?
C. Both have positive oxidation states in their oxides.
D. Both are good conductors of electricity in solid state.
17. Concerning the same volume of 0.5 M H₂SO4 (aq) and 0.5 M (COOH)₂ (aq), which of the
following comparison is correct?
0.5 M H₂SO4(aq)
Sulphur atoms form covalent bonds with chlorine atoms.
Magnesium has a giant metallic structure.
C. Methyl orange is a suitable indicator
for the titration against NaOH(aq).
It has a higher pH.
More 1 M NaOH(aq) is required for
complete neutralization.
Its temperature rises when completely
neutralized by 1 M NaOH(aq).
HKDSE CHEMISTRY - A Modern View (Second Edition)
O Aristo Educational Press Ltd 2017
18. What is the ratio of a to c in the following half equation?
a H₂O₂ + b H+ + ce →d H₂O
0.5 M (COOH)₂(aq)
It has a lower pH.
Less 1 M NaOH(aq) is required for
complete neutralization.
Phenolphthalein is a suitable indicator
for the titration against NaOH(aq).
Its temperature drops when completely
neutralized by 1 M NaOH(aq).
S5 Final Term Exam
S5 Final Term Exam
19. The reaction between chlorine and methane is an example of a chain reaction. Which of the
following is/are the propagation step(s) in this reaction?
(1) CH₂ + Cl CH3 + HCl
(2) CH3 + Cl → CH3C1
CH₂Cl(g) + Cl₂(g) → CH₂Cl₂(1) + HCl(g)
A. (1) only
B. (2) only
(1) and (3) only
D. (2) and (3) only
20. Consider the following chemical cell.
Which of the follow
carbon electrode for
B. Carbon el
K₂Cr₂Opaq) Caron el
HKDSE CHEMISTRY - A Modern View (Second Edition)
O Aristo Educational Press Ltd 2017
21. Which of the following compounds consist(s) of non-polar molecules?
(1) Hydrogen sulphide
(2) Carbon dioxide
(3) Silicon dioxide
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
carbon electrode
of the chemical cell.
0.1 M FeSO₂(aq)
S5 Final Term Exam
S5 Final Term Exam
22. A segment of a polymer chain is shown below:
CH₂ H CH₂ H CH3
Directions:
Which of the following statements about the monomer of the above polymer is/are correct?
(1) It is an unsaturated hydrocarbon.
(2) It can decolorize acidified potassium dichromate solution.
(3) Its empirical formula is C4H8.
B. (2) only
(1) and (3) only
D. (2) and (3) only
23. When 0.250 dm³ of 1.50 M sodium hydroxide solution is added to 0.250 dm³ of 0.50 M
sulphuric acid, the temperature rise is 6.7°C. Given that the mass and specific heat capacity of
the mixture are 500 g and 4.20 J g`¹ K¯¹ respectively, what is the value of the enthalpy change
of neutralization between sodium hydroxide and sulphuric acid?
A. -52.5 kJ mol-¹
B. -56.3 kJ mol-¹
C. -58.1 kJ mol-¹
-113 kJ mol-¹
1st statement
24. Ammonium nitrate contains ionic bond
IA. Both statements are true and the 2nd statement is a correct explanation of the 1st statement.
Both statements are true and the 2nd statement is NOT a correct explanation of the 1st
The 1st statement is false but the 2nd statement is true.
Both statements are false.
Question 24 consists of two separate statements. Decide whether each of the two
statements is true or false; if both are true, then decide whether or not the second
statement is a correct explanation of the first statement. Then select one option from
A to D according to the following table:
HKDSE CHEMISTRY - A Modern View (Second Edition)
O Aristo Educational Press Ltd 2017
END OF PART I
2nd statement
nitrate solution contains mobile
S5 Final Term Exam
S5 Final Term Exam
25. In an experiment to study the rate of reaction, 5.0 g of calcium granules are added to 200 cm³
of 0.80 M hydrochloric acid at room temperature. Which of the following changes can increase
the initial rate of the reaction?
Using 10.0 g of calcium granules of similar size
B. Using 300 cm³ of 0.80 M hydrochloric acid
C. Using a larger beaker
D. Performing the experiment under a higher pressure
26. Ammonium dichromate ((NH4)2Cr₂O₂) decomposes upon heating to give chromium(III) oxide,
nitrogen and water. What is the volume of nitrogen formed at room temperature and pressure if
252 g of ammonium dichromate undergoes complete decomposition?
(NH4)2Cr₂O7(s) →→→ Cr₂O3(s) + N₂(g) + 4H₂O(g)
(Molar volume of gas at room temperature and pressure
masses: H = 1.0, N = 14.0, O = 16.0, Cr= 52.0)
A. 6.0 dm³
C. 24.0 dm³
D. 48.0 dm³
27. The reaction between methane and steam is represented by the following equation:
AHⓇ = +43 kJ mol-¹
(1) Increasing the pressure of the system
(2) Increasing the temperature of the system
(3) Using more catalysts
A. (1) only
(1) and (3) only
D. (2) and (3) only
CH4(g) + H₂O(g) ⇒ 3H₂(g) + CO(g)
Which of the following changes will increase the proportion of carbon monoxide in the
equilibrium mixture?
HKDSE CHEMISTRY - A Modern View (Second Edition)
O Aristo Educational Press Ltd 2017
24.0 dm³ mol¹; relative atomic
28. Which of the following shows the correct order of the boiling points of Na₂O, SO₂ and P4O10?
A. Na₂O B. SO₂ C. P4010 Na₂O < SO₂
D. P4010 SO₂ < Na₂O
S5 Final Term Exam
S5 Final Term Exam
29. Reactants X and Y, each 0.04 mol dm³, are allowed to react to form product Z in a closed
container. The equilibrium concentrations of X, Y and Z are 0.03 mol dm³, 0.01 mol dm¯³ and
0.02 mol dm³ respectively. Which of the following statements is/are correct?
(1) The chemical equation for this reaction is 3X + Y = 2Z.
The unit for the equilibrium constant is mol-² dm6.
(3) At equilibrium, the rate of consumption of X equals to the rate of formation of Z.
A. (1) only
(1) and (3) only
D. (2) and (3) only
30. What is the systematic name of the following compound?
4-methylpent-3-en-2-one
B. 2-methylpent-3-en-4-one
C. 4-methylpent-3-en-2-al
D. 2-methylpent-2-en-4-one
31. Consider the following compound:
H-C-C-C-C-CH3
Which of the following statements about the compound is correct?
It is a position isomer of hexanal.
It is a functional isomer of propyl propanoate.
C. It can be reduced by lithium aluminium hydride.
It can be oxidized by acidified potassium dichromate solution.
HKDSE CHEMISTRY - A Modern View (Second Edition)
O Aristo Educational Press Ltd 2017
S5 Final Term Exam

©2023 BAND1.ORG (US)