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Section A

Four suggested answers labeled A, B, C and D are given for each question. Choose onecorrect answer.

1. Ammonia is an example of a non-ideal gas becauseA. its molecule is smallB. the intermolecular forces are strongC. the volume occupied by ammonia can be ignoredD. ammonia is easily compressed at low temperature and high pressure

2. Which of the following statements is true regarding graphite, diamond andfullerene?

A. Their atoms contain delocalized electrons.B. Covalent bonds and van der Waals forces exist in their molecules.

C. Each carbon atom forms bonds with four other carbon atoms.D. Complete combustion produces water and carbon dioxide.

3. The proton number of an element X is 32. Which of the following shows the rightorder for the removal of electrons from their orbitals to form X4+ ion?

First Second Third FourthA. 4s 4s 4px 4pyB. 4px 4py 4s 4sC. 4px 4px 4s 4sD. 4py 4pz 3d 3d

4. The diagram below shows the crystalline lattice structure of a compound.

a b c 90o

Which of the following types of unit cells represents the lattice structure?

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A. MonoclinicB. TriclinicC. OrthorhombicD. Rhombohedral

5. The table below shows the proton numbers of four elements represented by letterswhich are not the usual symbols for the elements concerned.

Element P Q R SProton number 3 11 13 19

Which element has the strongest metallic bond?

A. P B. Q C. R D. S

6. Which molecule has the highest dipole moment?

H H Cl Cl

H C CCl C=C H H Cl Cl

A B

Cl CH3 Cl

C=C Cl

CH3 Cl Cl

C D

7. The following molecules undergo the same orbital hybridization except for

A. water B. ethaneC. ehteneD. chloromethane

8. Which of the following statements regarding the half-life of a first order reactionis true?


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A. The half-life is affected by pressureB. The half-life depends on the concentration of the reactantsC. The half-life is shorter at lower temperatureD. At the end of the fourth half-life, the percentage of element left is 6.25% of the

original quantity

9. Hydrazine, N2H4, is a weak base. The dissociation constant Kb of this base is3.00 X 10-6 moldm-3. What is the pH value of a 0.100 moldm-3 aqueous solution ofhydrazine?

A. 3.26 B. 7.50 C. 9.46 D. 10.7

10. Which of the following solutions can retain its pH when a few drops of aqueoussodium hydroxide is added?

A. Aqueous 2-chloroethanoic acidB. Aqueous aminoethanoic acid

C. Aqueous sodium ethanoateD. Aqueous phenol

11. Which of the following type of chromatographies is the most suitable to analysethe percentage of alcohol contained in a blood sample?

A. Column chromatographyB. Gas-liquid chromatographyC. Thin-layer chromatographyD. Paper chromatography

12. A tribasic weak acid X dissolves in ether and in water. The relative molecularmass of X is 176. An amount of 2.34 g of X is shaken with a mixture of 100 cm3

of ether and 50 cm3 of water until an equilibrium is reached. An amount of 25.0cm3 of the aqueous solution needs 15.00 cm3 of 0.10 moldm-3 aqueous sodiumhydroxide solution for complete neutralization. Calculate the partition coefficientbetween ether and water of X.

A. 0.08 B. 0.16 C. 1.72 D. 6.15

13. The half-reaction of dichromate (VI) ion is shown as follows.

Cr2O72-

(aq) + 14H+

(aq) + 6e

2Cr3+

(aq) + 7H2O(l)In one experiment, 45.0 cm3 of 0.2 moldm-3 aqueous M2+ solution has reacted with

15.0 cm3 of 0.1 moldm-3 aqueous potassium dichromate (VI) solution. What is theoxidation state of M after the reaction?

A. +3 B. +4 C. +5 D. +7


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14. The diagram below shows the Born-Haber cycle for the formation of sodiumfluoride.

-574 kJmol-1

Na(s) + F2(g) NaF(s)

+107 kJmol-1 +79 kJmol-1

Na(g) + F(g)

-928 kJmol-1

+496 kJmol-1

Na+(g) + F-(g)

What is the electron affinity, in kJmol-1, of fluorine?

A. -246 B. -275 C. -328 D. -820

15. Which of the following cations has the highest hydration energy?A. Li+

B. Na+

C. K+

D. Rb+

16. Which of the following compounds is the product obtained when ethene isoxidized by oxygen at 300oC, using silver catalyst?

A. HOCH2

CH2

OHB. HC CH

O O


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C. H2C CH2

O

D. O

H2C CH2

O O

17. A sample of a hydrated salt (M r = 120) loses 40% of its mass as water when heated.The relative molecular mass of the anhydrous salt is

A. 24B. 28C. 52D. 72

18. Which of the following does not form hydrogen bonds when dissolves in water?

A. NH3B. HBr C. CH3COOHD. HNO3

19. Equilibrium is established when 40% of dinitrogen tetroxide in a closed vessel attemperature T decomposes according to equation N2O4(g) 2NO2(g). If the totalpressure is P, what is equilibrium constant for the system?

A. P3

4

B. P9

16

C. P21

16

D. P2132

20. Which of the following affects the value of the solubility product, Ksp, of leadsulphide when it is precipitated by passing hydrogen sulphide into aqueous solution oflead(II) nitrate?

Pb(NO3)2(aq) + H2S(g) PbS(s) + 2HNO3(aq)


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A. the addition of sodium sulphateB. the addition of lead(II) nitrateC. an increase in temperatureD. an increase in the pressure of hydrogen sulphide

21. In the extraction of aluminium metal, if a current of 5A is passed for 3860 secondsthrough a cell that consists of molten cryolite, Na3AlF6, and carbon electrodes, what is themass of aluminium produced?

[Faraday constant, F, is 9.65 X 104 Cmol-1, relative atomic mass of Al = 27]

A. 7.2 gB. 3.6 gC. 1.8 gD. 0.9 g

22. Ka is a better measure for the strengths of weak acids as compared to pH because

A. its value is easier to measureB. its value does not depend on temperatureC. its value does not depend on the concentration of the acidD. its value is a whole number

23. An organic compound Z undergoes a catalytic hydrogenation reaction. Z also reactswith hydrogen bromide to form 2-bromopropane. The possible structural formula of Z is

A. CH2 = CH2B. CH3CH2CH3C. CH3CH = CH2D. CH3CH(OH)CH3

24. Which of the following compounds reacts easily with cold water?

A.Cl

B. CH2

Cl

C. CH3CH2ClD. CH3CH2COCl

25. The number of possible isomers (including optical isomers) for an alcohol withmolecular formula of C4H10O is


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A. 2B. 3C. 4D. 5

26. When aqueous iron(III) chloride is added to phenol,

A. chlorobenzene is formedB. white fumes are given offC. iron(III) is reduced to iron(II)D. a purple solution is formed

27. Which of the following reactions produces ethanol?

A. Ethyl ethanoate and lithium tetrahydridoaluminate

B. Methyl ethanoate and hot concentrated sulphuric acidC. Ethene and dilute aqueous potassium manganate (VII) solutionD. Chloroethane and ethanoic sodium hydroxide solution

28. Which of the following compounds cannot exhibit geometrical isomerism?

A. CH3CH = C(CH3)2B. C6H5CH = CHC6H5C. CH3CH = CHCH2CH3D. (CH3CH2)(CH3)C = C(CH3)H

29. Benzaldehyde differs from ethanal in its reaction withA. HCNB. 2, 4-dinitrophenylhydrazineC. NH2OHD. Fehlings solution

30. The reaction between propanone and 2, 4-dinitrophenylhydrazine is an example of

A. oxidationB. reduction

C. additionD. condensation

31. Which of the following compounds reacts by nucleophilic addition?


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A. CH3CH2OHB. CH3CH2BrC. CH3CHOD. C6H6

32. Compound X is oxidized to compound Y that does not reduce Fehlings solution. Xcould be

A. CH3COCH3B. CH3CHOHCH3C. CH3CH2CH2OHD. (CH3)3COH

33. Which of the following is a monomer for synthetic rubber?

A. EtheneB. PropeneC. 1, 3-butadieneD. Methyl-2-methylpropenoate

34. Sodium hydroxide is preferred over dilute sulphuric acid in the hydrolysis of ethylethanoate because,

A. the activation energy is lowerB. the OH- ion is more reactive than the SO42- ion

C. alkaline hydrolysis is non-reversibleD. it requires a lower temperature

35. Phenylamine is a weak base than ammonia because

A. ammonia is an ionic compound while phenylamine is a covalent compoundB. the lone-pair electrons in phenylamine can be delocalized into the benzene ringC. ammonia is soluble in water while pheylamine is notD. the large phenyl group in phenylamine hinders the attack by H3O+

36. What type of hybridization are / is involved in the carbon atoms in the benzoic acid

molecule?A. spB. sp2

C. sp3

D. sp2 and sp3


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37. N-Acetylglucosamine (NAG) is the major component of the crustacean skin. Itsstructural formula is CH3 CONH CH(CHO) (CHOH)3 CH2OH. What is the nameof the functional group of NAG which undergoes hydrolysis?

A. Amino

B. CarbonylC. HydroxylD. Carboxamide

38. Tertiary alcohol is resistant to oxidation because

A. they have very negative enthalpy of formationB. they are strong oxidizing agentsC. they are non-polarD. they involve the breaking of carbon-carbon bonds

39. The structural formula of natural rubber is given below.H H CH3 H

[ C C = C C ]n H H

The presence of double bond in the structure of natural rubber makes this substance

A. elastic

B. hardC. resistant to heatD. easy to oxidize

40. A copolymer is produced

A. through cross-linking of the polymer chainsB. when rubber is vulcanizedC. by heating the polymer then cooling it rapidlyD. when two different monomers are used


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Section B

For each of the questions in this section one or more of the three numbered statements 1to 3 may be correct. Determine which of the statements is correct. The response A to Dshould be selected on the basis of the following.

A B C D

Only 1 is correct Only 1 and 2 arecorrect Only 2 and 3 arecorrect 1, 2 and 3 arecorrect

41. The mass spectrum of an element X is shown below.

99.63100

Percentage ofabundance

0.37

0 14 15 mass/charge

From the mass spectrum above, it can be concluded that,

1. element X consists of two isotopes with relative isotopic mass of 14 and 152. the nucleon number of X is 14.53. the isotopes of X have a different number of protons

42. Which of the following species do not have a tetrahedral shape?

1. PH4+

2. ICl4-

3. XeF4


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43. The advantages of ether as an extracting solvent involving organic compoundsare

1. ether is flammable2. ether is volatile3. ether is inert

44. Which of the following enthalpy changes can be determined directly fromexperiments?

1. Lattice energy2. Ionisation energy3. Enthalpy of neutralization

45. Which of the following contain linkage of glucose units?1. Cellulose2. Starch3. Protein

46. The table below shows the dissociation constant, Ka, for four organic acids at25oC.

Formula K a/moldm-3

C6H5COOHCH3COOH

ClCH2COOHCl2CHCOOH

6.3 X 10-5

1.7 X 10-5

1.3 X 10-3

5.0 X 10-2

Which of the following statements is/are the conclusion(s) based on the abovedata?

1. Chlorine substituted ethanoic acid is a stronger acid than ethanoic acid2. Cl3CCOOH is expected to be a stronger acid than Cl2CHCOOH.3. ClC6H4COOH is expected to be a stronger acid than C6H5COOH

47. Which of the following compounds will react with ethanoyl chloride?1. water

2. phenylamine3. propanal

48. Which of the following acids can be oxidize by acidified potassium manganate(VII)?

1. Benzoic acid2. Methanoic acid3. Ethanedioic acid


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49. Which of the following statements are true for aminoethanoic acid and 2-aminopropanoic acid?

1. Aminoethanoic acid is optically active, while 2-aminopropanoic acid is not2. both form zwitterions in aqueous solution

3. both are insoluble in organic solvents

50. Which of the following can be used to differentiate between ethylamine andethanamide?

1. Hot and dilute sodium hydroxide2. Cold and dilute hydrochloric acid3. Ethanoyl chloride


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