2013 s5 chem supple paper 1a (all)

5/28/2018 2013 s5 Chem Supple Paper 1a (All)

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Jing Kung Educational Press

All Rights Reserved 2011Not to be taken away before theend of the examination session

1

MC

HKDSECHEM

PAPER 1A

HONG KONG DIPLOMA OF SECONDARY EDUCATION EXAMINATION

Mock Examination (Higher Tier)

CHEMISTRY PAPER 1

Time allowed: 2 hours

This paper must be answered in English.

GENERAL INSTRUCTIONS

1. There are TWOsections, A and B, in this Paper. Section A carries 36 marks and Section B carries 84 marks. Yo

are advised to finish Section A in about 45 minutes and Section B in about 105 minutes.

2. Section A consists of multiple-choice questions in this question book, while Section B contains convention

questions printed separately in Question-Answer Book B.

3. Answers to Section A should be marked on the Multiple-choice Answer Sheet while answers to Section

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 must be handed in separately at the end of th

examination.

SECTION A (MULTIPLE-CHOICE QUESTIONS)

INSTRUCTIONS FOR SECTION A

1. Read the instructions on the Answer Sheet carefully. Stick a barcode label and insert the information required i

the spaces provided.

2. When told to open this book, you should check that all the questions are there. Look for the words END O

SECTION Aafter the last question.

3. All questions carry equal marks.

4. ANSWER ALL QUESTIONS.You should use an HB pencil to mark all your answers on the Answer Shee

Wrong marks must be completely erased.

5. You should mark only ONEanswer for each question. If you mark more than one answer, you will receiveN

MARKSfor that question.

6. No marks will be deducted for wrong answers.

L.H.M. CHUNG


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2

HKDSEMock Exam (Higher Tier)

Jing Kung Educational PreAll Rights Reserved 201

HKDSE-CHEM 1A-2

This section consists of two parts. There are 24 questions in PART I and 12 questions in PART II.

Choose the best answer for each question.

Candidates may refer to the Periodic Table printed on the back of this Question Book.

PART I

1. Which of the following statements concerning the periodic table is correct?

A. The elements are arranged in increasing order of neutron number.

B. The lower the element located in each group, the more reactive the element is.

C. The boiling point of the elements in Group VII increases down the group.

D. All noble gases have 8 outermost shell electrons in their atoms.

2. X, Y and Z are three different elements. X2+ion, Yion and argon atom have the same electronic arrangement.

belongs to the same group as X and the same period as Y in the periodic table. What is Z?

A. Br

B. Cl

C. Mg

D. Sr

3. Which of the following structural features of graphite accounts for its use as pencil cores?

A. Each carbon atom linking to three other carbon atoms

B. The van der Waals forces between the layers of atoms

C. The hexagonal arrangement of carbon atoms in each layer D. The presence of delocalized electrons

4. The relative atomic mass of rubidium (Rb) is 85.5. Rubidium has two isotopes:85

Rb and87

Rb. What is th

percentage abundance of85

Rb in rubidium?

A. 25.0%

B. 36.0%

C. 66.0%

D. 75.0%


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HKDSMock Exam (Higher Tie

3 Jing Kung Educational PreAll Rights Reserved 201

HKDSE-CHEM 1A-3

5. Which of the following combinations concerning the common use of metal is correct?

Metal Use

A. Cadmium making rechargeable cells

B. Copper making fuses in electric plugs

C. Titanium making water taps D. Zinc making food cans

6. A certain form of carbon is composed of C60molecules. Each C60molecule is formed by 60 carbon atoms bonde

together like a football as shown in the diagram below:

Approximate how many such molecules are present in 12 g of this form of carbon?

(Relative atomic mass: C = 12.0; Avogadro constant = 6.02 x1023

mol1

)

A. 1.0 x1022

B. 2.0 x1022

C. 3.6 x1023

D. 6.0 x1023

7. X2+ion has an electronic arrangement 2,8. Which of the following statements concerning the carbonate of X

INCORRECT?

A. It is a white solid.

B. It decomposes on heating.

C. It produces a bright white light in flame test.

D. It gives carbon dioxide gas when mixed with dilute hydrochloric acid.

8. A salt CuSO4(NH4)2SO46H2O is dissolved in water. The solution is warmed with excess NaOH(aq). Which of th

following observations is correct?

A. No pungent gas evolves and no precipitate forms.

B. No pungent gas evolves but a blue precipitate forms.

C. A pungent gas evolves but no precipitate forms.

D. A pungent gas evolves and a blue precipitate forms.


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HKDSE-CHEM 1A-4

Directions: Questions 9 and 10 refer to the following experiment.

In an experiment, 100.0 cm3of Ba(OH)2(aq) were transferred to a beaker. 1.20 mol dm3H2SO4(aq) was then added t

the solution. The electrical conductivity of the mixture was measured with a conductivity meter connected to a data

logger. The graph below shows the experimental results.

9. Which of the following pieces of apparatus should be used to add the H2SO4(aq) to the solution in the beaker?

A. Burette

B. Conical flask

C. Pipette

D. Volumetric flask

10. What is the molarity of the Ba(OH)2(aq)?

A. 0.108 mol dm3

B. 0.216 mol dm3

C. 0.333 mol dm3

D. 0.667 mol dm3


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HKDSE-CHEM 1A-5

11. The diagram below shows a kind of traditional button cell making from mercury(II) oxide, zinc powder an

sodium hydroxide paste.

Which of the following statements about the cell is correct?

A. Mercury(II) oxide should be at the region labelled X.

B. Zinc undergoes oxidation when the cell discharges.

C. Mercury(II) oxide acts as the anode.

D. The maximum voltage supplied by the cell increases if zinc powder is replaced by iron powder.

12. Consider the experimental set-ups shown below.

metal Y Cu

electrons

Figure 2

metal X Cu

NaCl(aq)

electrons

Figure 1

In Figure 1, if the Cu is replaced by metal Y, which of the following statements is correct?

A. Chlorine gas will be liberated from metal Y.

B. A solid will deposit on the surface of metal Y.

C. Metal Y acts as the anode.

D. Electrons will flow from metal X to metal Y in the external circuit.

13. Which of the following processes gives hydrogen gas as the major product?

A. Adding magnesium to dilute nitric acid

B. Adding copper to concentrated sulphuric acid

C. Passing steam over heated zinc granules

D. Electrolysis of concentrated sodium chloride solution using mercury as the cathode


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HKDSE-CHEM 1A-6

14. The diagram shows a stream of liquid running from a burette and a negatively charged rod being brought clos

to the stream.

Which of the following liquids will be deflected as shown?

A. Cyclohexane

B. Carbon disulphide

C. Propanone

D. Tetrachloromethane

15. The equation below represents the complete combustion of carbon compound X:

X + 3O2 2CO2+ 3H2O

What is X?

A. C2H4 B. C2H6 C. C2H4O

D. C2H6O

16. The table below lists the standard enthalpy change of formation of four compounds:

Compound Hqf(kJ mol1

)

H2O(l) 286

HCl(g) 92

SiO2(s) 910

SiCl4(l) 640


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HKDSE-CHEM 1A-7

What is the standard enthalpy change of the hydrolysis of SiCl4(l)?

SiCl4(l) + 2H2O(l) SiO2(s) + 4HCl(g)

A. 76 kJ

B. 66 kJ

C. +66 kJ D. +76 kJ

17. 123I and 127I are two isotopes of iodine. 123I is radioactive while 127I is not. Which of the following statements abou

these two isotopes is / are correct?

(1) 123I and 127I have different number of electrons.

(2) 123I has a greater proton-to-neutron ratio than 127I.

(3) 123I is chemically more reactive than 127I.

A. (1) only

B. (2) only

C. (1) and (3) only

D. (2) and (3) only

18. Which of the following are advantages of anodizing aluminium?

(1) It enables aluminium to be dyed readily.

(2) It makes aluminium stronger.

(3) It increases the corrosion resistance of aluminium.

A. (1) and (2) only B. (1) and (3) only

C. (2) and (3) only

D. (1), (2) and (3)

19. Which of the following is / are redox reaction(s)?

(1) C2H6+ Cl2 C2H5Cl + HCl

(2) SO2+ H2O H2SO3 (3) 2CrO4

2+ 2H+ Cr2O72+ H2O

A. (1) only B. (2) only

C. (1) and (3) only

D. (2) and (3) only


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HKDSE-CHEM 1A-8

20. Which of the following species has / have the same shape as SiF4?

(1) PCl4+

(2) SF4 (3) XeF4

A. (1) only B. (2) only

C. (1) and (3) only

D. (2) and (3) only

21. Which of the following statements concerning NH3and PH3are correct?

(1) The HNH bond angle in NH3is greater than the HPH bond angle in PH3.

(2) The water solubility of NH3is higher than that of PH3.

(3) The boiling point of NH3is higher than that of PH3.

A. (1) and (2) only

B. (1) and (3) only

C. (2) and (3) only

D. (1), (2) and (3)

22. Which of the following statements concerning the reaction between acidified dilute potassium permangana

solution and ethene is / are correct?

(1) The oxidation number of manganese changes from +7 to +2.

(2) The structure of the organic product is OH

OH

H

H

H

C C

H

.

(3) A similar reaction will occur if acidified dilute potassium dichromate solution is used instead of acidifie

dilute potassium permanganate solution.

A. (1) only

B. (2) only

C. (1) and (3) only

D. (2) and (3) only


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HKDSE-CHEM 1A-9

Directions: Each question below (Questions 23 to 24) consists of two separate statements. Decide whether each o

the two statements is true or false; if both are true, then decide whether or not the second statemen

is a correctexplanation of the first statement. Then select one option from A to D according to th

following table:

A. Both statements are true and the 2nd statement is a correct explanation of the 1st statement.

B. Both statements are true but the 2nd statement is NOT a correct explanation of the 1st statement.

C. The 1st statement is false but the 2nd statement is true.

D. Both statements are false.

1st statement 2nd statement

23. 2 mol dm3hydrochloric acid can react with Hydrochloric acid is a stronger acid than

copper but 2 mol dm3ethanoic acid cannot. ethanoic acid.

24. A colour change occurs when sulphur dioxide Sulphur dioxide can reduce iodide ion to

is passed into potassium iodide solution. iodine.

END OF PART I


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HKDSE-CHEM 1A-10

PART II

Directions: Questions 25 to 26 refer to carbon compound X.

Consider the following information about carbon compound X:

X undergoes reduction with LiAlH4to give a mixture of isomers Y and Z of molecular formula C4H10O. X does not react with warm acidified potassium dichromate solution.

X does not react with aqueous bromine.

25. X could be

A. CH2=CHCH2CH2OH.

B. CH3COCH2CH3.

C. CH3CH2CH2CHO.

D. CH2=CHCH2COOH.

26. Compounds Y and Z are

A. geometrical isomers.

B. isotopic isomers.

C. enantiomers.

D. structural isomers.

27. Menthol shown below is used in skin lotions.

CH

CH3

H3C

OH

CH3

Which of the following statements concerning menthol is INCORRECT?

A. It has two chiral carbons.

B. It can be dehydrated by heating with concentrated sulphuric acid. C. It gives steamy fumes when mixed with phosphorus pentachloride.

D. When warmed with acidified potassium dichromate solution, it turns the orange dichromate solutio

green.


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HKDSE-CHEM 1A-11

28. The progress of the reaction between permanganate ions and oxalate ions was followed by using a colorimeter.

Consider the following information about two reaction mixtures:

Reaction mixture 1 2

0.0010 mol dm3sodium oxalate solution (cm3) 2.0 1.0

2.0 mol dm3sulphuric acid (cm3) 1.0 1.0

Distilled water (cm3) 0.0 1.0

0.0010 mol dm3potassium permanganate solution (cm3) 1.0 1.0

Which of the following curves correctly shows the results obtained?

A. B.

C. D.

29. Consider the reaction of H2(g) and I2(g) at elevated temperatures:

H2(g) + I2(g) 2HI(g)

4.00 moles of each of H2(g) and I2(g) were introduced into an evacuated 5.00 dm3container kept at 713 K. A

equilibrium, the concentration of HI(g) in the mixture was 1.26 mol dm3

.

What is the equilibrium constant,K

c, for the reaction at 713 K?

A. 1.48

B. 2.20

C. 7.41

D. 54.9


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HKDSE-CHEM 1A-12

30. Consider the following equilibrium system:

Co2+(aq) + 4Cl(aq) CoCl42(aq)

pink blue

When the temperature is increased, the solution turns dark blue. It can be deduced that the forward reaction is

A. exothermic and the value of Kchas increased.

B. exothermic and the value of Kchas decreased.

C. endothermic and the value of Kchas decreased.

D. endothermic and the value of Kchas increased.

31. The possible oxidation states of titanium are +1, +2, +3 and +4.

Which of the following compounds of titanium does NOT exist?

A. TiCl4 B. K2TiO4 C. K3TiF6 D. Ti2O3

32. Consider the following two carbon compounds, X and Y.

X Y

Cl H

Cl

C C

H Cl Cl

HH

C C

Which of the following statements concerning the compounds is / are correct?

(1) They are geometrical isomers.

(2) They are enantiomers.

(3) The boiling point of X is higher than that of Y.

A. (1) only

B. (2) only

C. (1) and (3) only

D. (2) and (3) only


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HKDSE-CHEM 1A-13

33. Consider the following reaction:

Mg(s) + 2HBr(aq) MgBr2(aq) + H2(g) H< 0

Which of the following will increase the rate of the reaction?

(1) Increasing the concentration of HBr(aq) (2) Increasing the surface area of Mg(s)

(3) Decreasing the temperature of HBr(aq)

A. (1) and (2) only

B. (1) and (3) only

C. (2) and (3) only

D. (1), (2) and (3)

34. The symbols p, q, r, s, t, u, v and w represent eight consecutive elements in the second and third periods of th

periodic table. The table below lists their boiling points.

Element p q r s t u v w

Boiling point (K) 4 203 5 103 77 90 85 27 1 163 1 383

Which of the following statements about the elements is / are correct?

(1) Element p represents carbon.

(2) Element t is a halogen.

(3) Element v is a soft metal.

A. (1) only

B. (2) only

C. (1) and (3) only

D. (2) and (3) only


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HKDSE-CHEM 1A-14

Directions: Each question below (Questions 35 to 36) consists of two separate statements. Decide whether each o

the two statements is true or false; if both are true, then decide whether or not the second statemen

is a correctexplanation of the first statement. Then select one option from A to D according to th

following table:

A. Both statements are true and the 2nd statement is a correct explanation of the 1st statement.

B. Both statements are true but the 2nd statement is NOT a correct explanation of the 1st statement.

C. The 1st statement is false but the 2nd statement is true.

D. Both statements are false.

1st statement 2nd statement

35. Propanal and propanone can be distinguished Propanal turns the dichromate solution from

by warming with acidified potassium dichromate orange to green while propanone does not.

solution.

36. Two reactant particles colliding in a right For two reactant particles to collide, they

orientation must lead to a reaction. must have an energy equal to or greater than the activation energy.

END OF PART II

END OF SECTION A


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HKDSE-CHEM 1A-16

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2013 s5 chem supple paper 1a (all)

Documents

section b

questionanswer book

question book

section aand

section a1

best answer

multiplechoice answer

answer sheewrong marks