CHEMISTRY 9647/01 - ASKnLearn

1 

INNOVA JUNIOR COLLEGE 

JC 2 PRELIMINARY EXAMINATIONS 1 

in preparation for General Certificate of Education Advanced Level 

Higher 2 

CANDIDATE 

NAME 

CLASS 

INDEX NUMBER 

CHEMISTRY 

Paper 1 Multiple Choice 

Additional Materials: 

Data Booklet 

Multiple Choice Answer Sheet 

9647/01 

-- July 2010 

1 hour 

READ THESE INSTRUCTIONS FIRST 

Write your name and class on all the work you hand in. 

Write in soft pencil. 

Do not use staples, paper clips, highlighters, glue or correction fluid. 

There are forty questions on this paper. Answer all questions. For each question there are four 

possible answers A, B, C and D. 

Choose the one you consider correct and record your choice in soft pencil on the separate 

Answer Sheet. 

Read the instructions on the Answer Sheet very carefully. 

Each correct answer will score one mark. A mark will not be deducted for a wrong answer. 

Any rough working should be done in this booklet. 

This document consists of 16 printed pages and 0 blank page. 

Innova Junior College 

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2 

Section A 

For each question there are four possible answers, A, B, C, and D. Choose the one you consider 

to be correct. 

1 On heating, 0.02 moles of element S reacts with 0.015 moles of oxygen gas. What is the 

empirical formula of the oxide of S 

A S 2 O 3 C S 2 O 5 

B SO 3 D S 2 O 

2 Group I and Group II ionic hydrides react with water according to the following reaction: 

H – + H 2 O → OH – + H 2 

In an experiment, 1 g of a sample of ionic hydride was dissolved in excess water. The 

resulting solution required 24.0 cm 3 of a 2.0 mol dm -3 of HCl solution for complete 

neutralization. What is the formula of the hydride used 

A CaH 2 C LiH 

B MgH 2 D NaH 

3 Which of the following is the correct electronic configuration of the hypothetical ion 50 + 

25 T 

A 1s 2 2s 2 2p 6 3s 2 3p 6 3d 6 

B 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 4 

C 1s 2 2s 2 2p 6 3s 2 3p 6 3d 4 4s 2 

D 1s 2 2s 2 2p 6 3s 2 3p 6 3d 5 4s 1 

4 Which of the following ions will be deflected the most when passed through an electric 

field 

A 24 2+ 

12 Mg C 27 

13 Al3+ 

B 14 N 3- 

D 16 O 2- 

7 8 

5 In which of the following groups are all the species of the same shape 

A 

NH 3 , HCHO 

B H 2 O 2 , N 2 H 4 

C CO 2 , I 3 

– 

D CH 4 , XeCl 4 

PRELIM 1 © INNOVA 9647/01/2010 [Turn over

3 

6 Solid iodine, I 2 (s), is known to sublime at room temperature to give a violet vapour. What 

does this suggest about the main intermolecular bonding in I 2 (s) to be 

A 

B 

C 

D 

Hydrogen bonding 

Covalent bonding 

van der Waals’ forces 

Ionic bonding 

7 An ideal gas will obey the PV = nRT equation. 1 mole of gas U occupies a volume of 

12.3 dm 3 at 300 K and 2.0 atm. Another mole of gas V occupies a volume of 22.4 dm 3 at 

the same temperature and pressure. Which of the following best describes this 

phenomenon 

A Gas U is He while gas V is NH 3 . 

B Gas U is CO 2 while gas V is CH 4 . 

C 

D 

Gases U and V are behaving ideally. 

Gases U and V experience significant intermolecular forces of attraction between 

their molecules. 

8 Ammonium hydrogen sulfide dissociates as follows: 

NH 4 HS (s) H 2 S (g) + NH 3 (g) ∆H > 0 

When an excess of NH 4 HS (s) is placed in an enclosed vessel at 300 K, it dissociates until 

the total pressure is 0.66 atm. Which of the following statements is correct about the 

above system 

A 

B 

C 

By Le Chatelier’s principle, addition of NH 4 HS would cause the equilibrium position 

to shift right. 

An increase in temperature will cause the percentage dissociation of NH 4 HS to 

decrease. 

When the system is compressed, the value of K p will decrease. 

D The K p of the system is 0.109 atm 2 . 


4 

9 The graph below shows the results of an investigation of the initial rate of reaction of a 

particular substrate by its enzyme. In the experiments, only the concentration of the 

substrate was varied, keeping the concentration of the enzyme constant. 

Which of the following is true about the graph above 

A 

B 

C 

D 

At V max , the catalytic enzyme reaction stops. 

At very high [substrate], the rate of reaction becomes dependent on [substrate]. 

At low [substrate], the reaction is first order with respect to [substrate]. 

K m is the Michaelis constant and is defined as the concentration of substrate needed 

to achieve the maximal rate of reaction. 

10 For the elimination of HCl from C 2 H 4 Cl 2 , 

C 2 H 4 Cl 2 (g) → C 2 H 4 (g) + Cl 2 (g) 

the standard thermodynamic values (at 25 ° C) are 

∆H θ +83.5 kJ mol -1 

∆S θ +83.0 J mol -1 K -1 

Determine the lowest temperature at which the above reaction will become feasible. 

A 

B 

C 

D 

Greater than 1006 K 

Greater than 1.006 K 

Less than 1006 K 

Less than 1.006 K 


5 

11 Phosphorus can react with chlorine to form phosphorus pentachloride and phosphorus 

trichloride. Some thermochemical data related to these elements are shown below: 

Enthalpy change of atomization of phosphorus +314 kJ mol -1 

Enthalpy change of formation of PCl 5 –500 kJ mol -1 

Bond energy of Cl 2 +244 kJ mol -1 

What is the mean P-Cl bond energy in PCl 5 

A +85 kJ mol -1 

B +285 kJ mol -1 

C +424 kJ mol -1 

D +1424 kJ mol -1 

12 Values of ionic product for water at different temperatures are given below: 

Temperature/ ° C 0 25 100 

K w /mol 2 dm -6 1.1 x 10 -15 1.0 x 10 -14 5.1 x 10 -13 

What are the approximate values of the pH of pure water at 0 ° C, 25 ° C and 100 ° C 

0 ° C 25 ° C 100 ° C 

A 6.1 7.0 7.5 

B 7.0 7.0 7.0 

C 7.5 7.0 6.1 

D 15.0 14.0 12.3 

13 How much water must be added to 2.0 dm 3 of a solution of a strong acid of pH 2.0 in order 

to increase the pH to 3.0 

A 1.0 dm 3 

B 2.0 dm 3 

C 10.0 dm 3 

D 18.0 dm 3 


6 

14 The standard electrode potential E θ for each of the three electrode reactions in aqueous 

solutions, is given below. 

Electrode reaction E θ /V 

2CO 2 + 2e C 2 O 4 

2– 

–0.49 

Fe 3+ + e Fe 2+ +0.77 

MnO 4 – + 8H + + 5e Mn 2+ + 4H 2 O +1.52 

How many moles of MnO 4 – will react with 1 mole of iron(II) ethanedioate in acid solution 

A 1 

5 

B 2 

5 

C 3 

5 

D 5 

3 

15 The structure of Vitamin A is given below. 

Vitamin A can react with hydrogen gas in the presence of nickel catalyst at high 

temperature and high pressure to give Compound W. How many chiral centres do the 

molecules of Vitamin A and Compound W have 

Vitamin A 

Compound W 

A 0 2 

B 0 4 

C 1 2 

D 1 4 


7 

16 2,4-dichlorophenol is used as a starting material in the preparation of a weed killer, 

2,4-D. It can react with 2-chloroacetyl chloride under suitable conditions to obtain two 

different products. 

Cl 

Cl 

OH 

Cl 

2,4-dichlorophenol 

+ 

ClCH 2 COCl 

reaction I 

reaction II 

Cl 

Cl 

product 1 

OCH 2 COCl 

OCOCH 2 Cl 

What is the mechanism of reaction I and reaction II 

Cl 

product 2 

reaction I 

reaction II 

A Elimination Electrophilic substitution 

B Electrophilic substitution Condensation 

C Nucleophilic substitution Electrophilic substitution 

D Nucleophilic substitution Nucleophilic substitution 

17 Experiments are carried out on three compounds X, Y, Z. 

A sample of 0.01 mol of each compound is boiled under reflux with 50 cm 3 of 1 mol dm -3 

NaOH (excess) until hydrolysis is complete and any ammonia produced is expelled from 

solution. The excess NaOH is titrated in each case and found to require 20 cm 3 , 30 cm 3 

and 40 cm 3 of 1 mol dm -3 HCl for neutralization. 

Which sequence of compounds matches these results 

20 cm 3 30 cm 3 40 cm 3 

A X Y Z 

B X Z Y 

C Y Z X 

D Z Y X 


8 

18 Which pair of reactions could have the same common intermediate 

L CH 3 CH 2 CH 3 Intermediate (CH 3 ) 2 CHCN 

M CH 3 CH(OH)CH 3 Intermediate (CH 3 ) 2 C(OH)CN 

N CH 3 CH=CH 2 Intermediate CH 3 CH(NH 2 )CH 3 

O CH 3 CO 2 CH 2 CH 2 CH 3 Intermediate CH 3 CH 2 CH 2 Br 

A L and M C M and O 

B L and N D N and O 

19 Citric acid, which causes the sharp taste of lemon juice, has the following structure. 

Which of the following reacts completely with 1 mol of citric acid 

A 3 mol of PCl 5 

B 4 mol of HCl 

C 4 mol of Na 

D 4 mol of NaOH 

20 For which pair of compounds can alkaline aqueous iodine be used to distinguish between 

members of the pair 

A CH 3 COOH and CH 3 COOCH 3 

B CH 3 CHO and CH 3 COOH 

C CH 3 CHO and CH 3 CH(OH)CH 3 

D (CH 3 ) 3 COH and CH 3 CH 2 CH 2 OH 

21 Which pair of compounds would be formed in the reaction of ethene with aqueous 

bromine in the presence of aqueous sodium chloride 

A 

B 

C 

D 

CH 2 BrCH 2 OH and CH 2 ClCH 2 OH 

CH 2 BrCH 2 OH and CH 2 ClCH 2 Cl 

CH 2 BrCH 2 Cl and CH 2 ClCH 2 Cl 

CH 2 BrCH 2 Br and CH 2 BrCH 2 Cl 


9 

22 Methylbenzene was reacted with chlorine in the presence of AlBr 3 catalyst. What organic 

product would be formed 

A 

C 

B CH 3 

Br 

D CH 3 

Br 

Cl 


10 

23 A mixture containing three amino acids was placed in a solution of pH 3 and subjected to 

electrophoresis as follows : 

The structures of the three amino acids as well as their isoelectric points are shown below. 

H 

Amino acid 

H 3 C 

H 2 N 

C CH 3 

C 

COOH 

Glutamic acid (Glu) Glycine (Gly) Valine (Val) 

Isoelectric point 3.2 5.7 6.1 

H 

Which one of the following filter papers shows a possible result of the separation of the 

amino acid mixture at pH 3 

A 

B 

C 

D 


11 

24 Which of the following compounds gives 

(i) fumes of HCl with PCl 5 

(ii) NH 3 when heated with NaOH (aq) 

A HOCH 2 CONH 2 

B HOCH 2 CH 2 NH 2 

C NH 2 CH 2 COOH 

D NH 2 CH 2 CONH 2 

25 An element from the third period (Na to S) is heated in chlorine. When the purified product 

is added to water, the resulting solution is found to be weakly acidic. 

Which of the following could be the element 

A Sodium C Aluminium 

B Silicon D Phosphorus 

26 Which of the following is a correct statement about transition metals 

A They are the only metals which form complex ions. 

B They are the only metals which give coloured ions in an aqueous solution. 

C They are the only metals which have more than one valency (oxidation state). 

D They are the only metals with a complete 4s orbital in their atoms. 

27 Use of the Data Booklet is relevant to this question. 

When heated strongly, PbCO 3 and ZnCO 3 decompose in the same way as CaCO 3 . 

What is the order of decomposition temperatures predicted for these three carbonates 

highest 

lowest 

A CaCO 3 > PbCO 3 > ZnCO 3 

B CaCO 3 > ZnCO 3 > PbCO 3 

C PbCO 3 > CaCO 3 > ZnCO 3 

D ZnCO 3 > CaCO 3 > PbCO 3 

28 Which property about the Group II element, strontium (or its compounds), is correct 

A 

B 

C 

D 

Strontium does not burn in air. 

Strontium does not react with steam. 

Strontium nitrate decomposes at a lower temperature than calcium nitrate. 

Strontium hydroxide is dehydrated to the oxide on being heated. 


12 

29 Consider the following three reactions: 

Cl 2 (g) + 2H 2 O (l) + SO 2 (g) → 2HCl (aq) + H 2 SO 4 (aq) 

Cl 2 (g) + H 2 S (g) → 2HCl (aq) + S (s) 

SO 2 (g) + 2H 2 S (g) → 2H 2 O (l) + 3S (s) 

Which of the following shows the correct order of strength of the three reacting gases as 

reducing agents 

strongest 

weakest 

A Chlorine Hydrogen sulfide Sulfur dioxide 

B Chlorine Sulfur dioxide Hydrogen sulfide 

C Hydrogen sulfide Sulfur dioxide Chlorine 

D Sulfur dioxide Hydrogen sulfide Chlorine 

30 A pale blue precipitate is formed when drops of NH 3 (aq) are added to Cu(NO 3 ) 2 (aq). 

When an excess of NH 3 (aq) is added, this precipitate dissolves giving a deep blue 

solution. 

Which process is not present in the above reaction sequence 

A 

B 

C 

D 

Dative bond formation 

Formation of complex ion 

Precipitation of copper(II) hydroxide 

Reduction of Cu 2+ ions 


13 

Section B 

For each of the questions in this section, one or more of the three numbered statements 1 to 3 

may be correct. 

Decide whether each of the statements is or is not correct (you may find it helpful to put a tick 

against the statements that you consider to be correct). 

The responses A to D should be selected on the basis of 

A B C D 

1, 2 and 3 are correct 1 and 2 only are 

correct 

2 and 3 only are 

correct 

1 only is correct. 

No other combination of statements is used as a correct response. 

31 An alkene, C n H 2n , is completely burnt in oxygen to give V cm 3 of gas at room temperature 

and pressure. Which of the statements about this reaction is correct 

A 1 The volume of oxygen required is directly proportional to the number of carbon 

atoms in the molecule. 

2 The complete combustion of an alkane with the same number of carbon atoms as 

the alkene will give V cm 3 of gas at room temperature and pressure. 

3 The volume of steam produced is the same as volume of carbon dioxide produced. 

32 Which of the following statement(s) is/are true 

A 1 1,2-dichlorobenzene is less volatile than 1,4-dichlorobenzene. 

2 The boiling point of pentane is higher than that of 2,3-dimethylpropane. 

3 4-nitrophenol is more soluble in water than 2-nitrophenol. 


33 The energy profile diagram shows the reaction to convert compound D to compound F. 

14 

Which statement correctly describes the reaction 

D 1 To convert D to F, the activation energy for the first step is larger than that for the 

second step. 

2 A catalyst will decrease the enthalpy change of reaction. 

3 F is thermodynamically less stable than D. 

34 The oxidation of aqueous potassium iodide by hydrogen peroxide 

H 2 O 2 (aq) + I – (aq) + 2H + (aq) → I 2 (aq) + 2H 2 O (l) 

is thought to proceed by the following mechanism: 

H 2 O 2 + I – → H 2 O + OI – 

OI – + H + → HOI 

HOI + H + + I – → I 2 + 2H 2 O 

(slow) 

(fast) 

(fast) 

Which of the following conclusions can be drawn from the above information 

B 1 The reaction is first order with respect to H 2 O 2 . 

2 When the concentration of H 2 O 2 quadruples and concentration of I – is halved, the 

overall rate doubles. 

3 When the concentration of H + increases, rate of reaction will increase. 

35 Which of the following statements are true for a standard cell set up using the half cells 

below 

Electrode reaction E θ /V 

Co 2+ + 2e Co –0.28 

Fe 2+ + 2e Fe –0.44 

B 1 Electrons flow in the external circuit from Fe to Co. 

2 The concentration of Co 2+ (aq) will decrease. 

3 Reduction occurs at the Fe terminal. 


15 

36 Safranal, an organic compound found in wolfberries, is found to have antidepressant 

properties. 

Which one of the following description(s) about Safranal is/are correct 

D 1 It gives brick red precipitate with alkaline copper complex. 

2 It reacts with 3 moles of LiAlH 4 in dry ether. 

3 All carbon atoms lie in one plane. 

37 Which of the following compounds react with hot ethanolic potassium hydroxide to 

produce an organic compound that decolourises liquid bromine 

B 1 CH 3 CH 2 CH(Br)CH 3 

2 (CH 3 ) 2 C(Br)CH 2 CH 2 CH 3 

3 (C 6 H 5 ) 3 CBr 

38 The amino acid tyrosine has the structural formula shown below. 

Which of the following is/are true about Tyrosine 

A 1 It exists as a pair of optical isomers. 

2 It reacts with aqueous sodium hydroxide to form a salt. 

3 It reacts with hydrochloric acid to form a salt. 

39 In hospitals, barium sulfate is used as “barium meal” in taking X-rays of the alimentary 

canal. It is mixed with food and eaten by the patient before the X-ray photographs are 

taken. 

What are the reasons for using the sulfate rather than other compounds of barium 

D 1 Barium sulfate is not poisonous because it is insoluble in water. 

2 Barium sulfate reacts with organic materials in the body. 

3 Barium sulfate forms sulfuric acid with the acid in the stomach. 


40 Which of the following explain(s) why silver chloride dissolves in aqueous ammonia 

16 

B 1 The ionic product [Ag + ][Cl – ] in the solution is less than the solubility product of 

AgCl(s). 

2 A complex ion, [Ag(NH 3 ) 2 ] + , is formed. 

3 Ammonium ions and chloride ions have great affinity for each other. 

A – 10 

B – 10 

C – 10 

D – 10

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