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MHSS Preliminary Examination 2006 SC(Phy/Chem)(5152/1) Sec 4E/5N

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MONKS HILL SECONDARY SCHOOL

PRELIMINARY EXAMINATION 2006

Subject : SCIENCE(Phy/Chem) Paper : 5152/1

Level : Sec 4E/5N(A) Date : 27 Sept 06

Day: Wednesday Duration : 1 Hour

INSTRUCTIONS TO CANDIDATESDO NOT OPEN THIS BOOKLET UNTIL YOU ARE TOLD TO DO SO

There are forty questions in this paper. Answerall questions. For each question, there are four

possible answers A, B, C and D. Choose the one answer you consider correct and record your

choice in soft pencil the optical answer sheet.

Read the instructions on the optical answer sheetvery carefully.

INFORMATION FOR CANDIDATESEach correct answer will score one mark. A mark will not be deducted for a wrong answer.

Your total score on this test will be the number of correct answers you give.

A copy of the Periodic Table and other data are given.

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This Question Paper consists of 11 printed pages.

21. Aqueous hydrogen peroxide undergoes catalytic decomposition as shown in the

equation below.

2H2O2(aq) 2H2O(l) + O2(g)

The diagram shows part of the apparatus used to measure the rate of decomposition.

Which piece of apparatus is connected at position X?

A burette B gas syringe

C measuring cylinder D pipette

22. Which one of the following is the boiling point of salt solution?

A 97 0C B 100 0C

C 104 0C D 130 0C

23. Aluminium has the symbol 2713Al. Which is correct line of data for an atom of

aluminium?

Number of

Protons Electrons NeutronsA 13 14 14

B 13 13 14

C 13 14 27

D 14 13 27

24. Which one of the following provides evidence that air is a mixture?

A Living things breathe oxygen.

B Air helps substances to burn.

C Liquid air can be separated by fractional distillation

D Nitrogen and oxygen are both gases.

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25. Which two statements about a covalent bond are correct?

1. It can be formed between two metal atoms

2, It can be formed between two non-metal atoms.

3. It is formed by the transferring of electrons between atoms

4. It is formed by sharing electrons between atoms.

A 1 and 3 B 1 and 4

C 2 ad 3 D 2 and 4

26. Which substance could be sodium chloride?

Substance Melting point/0CConduction of electricity

When liquid In aqueous solution

A -114 None None

B -114 None Good

C 180 None GoodD 808 Good Good

27. What is the volume of 6.4 g of SO2 gas at r.t.p?

A 1.2 dm3 B 2.4 dm3

C 12 dm3 D 6 dm3

28. What is the concentration of a solution contains 1.0 g of sodium hydroxide, NaOH,

dissolved in 250 cm3 of solution?

A 0.025 mol/dm3 B 0.10 mol/dm3

C 0.25 mol/dm3 D 1.0 mol/dm3

29. The structures of four molecules are drawn below.

What are the correct names for each molecule?

I II III IV

A Carbon dioxide Water Methane Oxygen

B Carbon dioxide Oxygen Water Methane

C Methane Carbon dioxide Water Oxygen

D Methane Water Carbon dioxide Oxygen

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30. Indicators are substances which change colour as pH changes. The chart below shows

the colour of some indicators and the pH range over which they change colour.

pH

0 2 4 6 8 10 12 14

Indicators

Methyl orange orange yellow

Bromothymol blue yellow blue

Thymolphthalein colourless blue

Tropaeolin yellow orange

pH range of 4 different

substances are given in the table

below

One of these 4 substances was tested

using 4 indicators. The table below

shows the results.

Substance pH Indicator Colour

Household ammonia 12 Methyl orange YellowSea water 8 9 Bromothymol blue Blue

Milk 6.3 6.6 Thymolphthalein Colourless

Orange juice 3 - 4 Tropaeolin yellow

Which substance was tested?

A milk B sea water

C orange juice D household ammonia

31. An acid A is added to a solution of nitrate of metal M. A dense white precipitate was

formed. What is A and M?

Acid A Metal M

A Hydrochloric acid Silver

B Nitric acid Sodium

C Sulphuric acid Aluminium

D Hydrochloric acid Barium

32. A metal Z lies between magnesium and iron in the reactivity series. Which reaction is Z

most likely to undergo?

A It reduces magnesium oxide to magnesium on heating.

B It liberates hydrogen from dilute hydrochloric acid.

C It displaces sodium from an aqueous solution of a sodium salt.

D Its oxide decomposes to give the metal on heating.

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33. The formation of liquid water from hydrogen and oxygen occurs in three stages.

Stage I 2H2(g) + O2(g) 4H(g) + 2O(g)

Stage II 4H(g) + 2O(g) 2H2O(g)

Stage III 2H2O(g) 2H2O(l)

Which stages are endothermic?

A I only B II only

C III only D I, II and III

34. Curve 1 shows the volume of carbon dioxide given off when 5 g of calcium carbonate

lumps react completely with an excess hydrochloric acid at 40 0C.

What change could produce curve 2?

A use a more concentration solution of the acid

B use a lower temperature

C use 3 g of calcium carbonate lumps

D use 5 g of calcium carbonate

35. Caesium, Cs, is a metal in Group I of the Periodic Table. Which conclusion can be

drawn from this information?

A A caesium atom gains an electron when it forms an ion.

B Caesium is more reactive than lithium.

C Caesium shows variable valency in its compounds.

D Many compounds of caesium are coloured.

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Volume of

carbon

dioxide/cm3

time/s

Curve 1

Curve 2

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36. The production of NEWater is outlined in the flowchart below.

What are processes X, Y and Z?

X Y Z

A Microfiltration UV disinfection Reverse osmosis

B Microfiltration Reverse osmosis UV disinfection

C Reverse osmosis UV disinfection Microfiltration

D UV disinfection Microfiltration Reverse osmosis

37. Which substance, present in car exhaust fumes, is not produced by the combustion of

hydrocarbons?

A carbon dioxide B carbon monoxideC oxides of nitrogen D water vapour

38. Fats, proteins and starch all undergo hydrolysis. What products are formed when each

of these is hydrolysed?

From fats From proteins From starch

A Soaps Amino acids Sugars

B Soaps Nylon Ethanol

C Sugars Amino acids Ethanol

D Sugars Amino acids Terylene

39. Why are large alkane molecules cracked to form smaller molecules?

A Alkanes with large molecules are not useful.

B Crude oil does not contain small alkane molecules.

C Small alkane molecules can be polymerized

D To meet the demand for small alkane molecules.

40. Which diagram represents the structure of terylene?

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Waste

waterX Y Z NEWater

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_______End of Paper__________

ANSWER SEC 4E/5N SCIENCE (CHEMISTRY) (5152)

PRELIM EXAMINATION 2006

Paper 1 (MCQ)

21 B 31 A

22 C 32 B

23 B 33 A

24 C 34 B

25 B 35 B

26 D 36 B27 B 37 C

28 B 38 A

29 D 39 D

30 B 40 C

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mhss prelim06 5152 p1 (2)

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