Bedok South Secondary School

1

BEDOK SOUTH SECONDARY SCHOOL PRELIMINARY EXAMINATION 2009 Science (Physics/Chemistry) Paper 1 5116/1 Level: Secondary 4 EXP/ 5 NA

Duration: 1 Hour

Date: 19th August 2009

Setters: Mr Benjamin Chan & Mr Douglas Lee

READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use paper clips, highlighters, glue or correction fluid. Write your name, class and index number on the answer sheet in the spaces provided. There are forty questions in this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider to be correct and record your choice in soft pencil on the separate answer sheet. Read the instruction 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. A copy of the Periodic Table is printed on page ___

This document consists of 12 printed pages including the cover page. [Turn Over

2 1

What is the length shown below on the micrometer screw gauge? 40 0

5 35 30 25

A 2

3.53 mm

B

3.83 mm

C

4. 33 mm

D

4.83 mm

The diagram below shows a speed-time graph. Which section of the graph shows increasing deceleration? Speed/ ms

-1

C B D

A

Time/s

3

The graph below shows the speed of car as it travels along an expressway. How far does the car travel in the first 4 seconds? Speed/ ms

-1

5

Time/s

0 A B C D 4

1

2

3

4

10.5 m 15.0 m 17.5 m 20.0 m

Which of the following quantities must change as an object is accelerating? A B C D

Mass Weight Velocity Volume

3 5

A commando of mass 70 kg parachutes out of a plane. After 15 seconds, he starts to fall at a constant speed. What is the magnitude of the air resistance he experiences after 15 seconds? Assume g = 10 m/s2 A B C D

6

A metal can containing 200 cm3 of paraffin (density 0.8 g/cm3) has a weight of 4 N. What is the mass of the metal can? A B C D

7

0N 100 N 400 N 700 N

1.6 g 2.4 g 160 g 240 g

The diagram below shows a hydraulic brake system. What is the force acting on piston B? 40 N

Piston A

Piston B

Area 0.5 m2

Area 0.2 m2

A 8

4N

B

16 N

C

20 N

D

Which of the following is a property of both liquids and gases? A B C D

They are incompressible They are compressible They can flow Their molecules are arranged in fixed positions

80 N

4 9

A coolie carries a 4kg sack of rice on his back over a distance of 10 m. What is the power of the coolie? (g = 10 N/kg) A B C D

0W 2.5 W 40 W 400 W

10 The diagram below tracks a ball as it falls from point X. If air resistance is negligible, which of the following statements about the ball is true?

X Y Z

A B C D

The ball is moving at its fastest at Y The ball possesses only kinetic energy at Z The ball possesses only gravitational potential energy at Y The total energy of the ball is the same at all points

11 Some helium is in an airtight jar. What will happen to the helium molecules when the gas is heated? A B C D

The molecules will move further apart The molecules will expand The molecules will move faster The molecules will become denser

12 Which of the following conditions would yield the fastest rate of evaporation? A B C D

Temperature Low Low High High

Surface area Small Large Small Large

Humidity High Low High Low

5 13 Two identical rods, one having a dull black finish and the other a polished silver finish, are placed an equal distance away from a radiator. The radiator is turned on for 10 minutes.

Dull Black Rod

Radiator

Polished Silver Rod

Which of the following lines is true? A B C D

Radiates best Black rod Black rod Silver rod Silver rod

Absorbs best Silver rod Black rod Silver rod Black rod

14 The diagram shows a light ray being reflected off a mirror. What are the angles of incidence and reflection?

A B C D

Angle of incidence 30° 30° 60° 60°

Angle of reflection 30° 60° 30° 60°

60°

15 Which of the following electromagnetic waves has the lowest frequency? A C

Microwaves Visible Light

B D

Radio waves X - rays

16 A water wave travels from a deeper region to a shallower region of water. Which of the following quantities remains unchanged? A B C D

Speed Frequency Wavelength Density

6 17 Which of the following circuits is used to determine the resistance of the light bulb? A

B

A

A

V

C

A

V

D

V

V

A

A

V 18 1 kWh of energy costs $0.30. How much does it cost to run a 4500 W airconditioner for 2 hours? A B C D

$1.35 $2.70 $13.50 $27.00

19 A bulb rated at 8 V, 2 A is turned on for 20 s. How much energy is used? A B C D

8J 16 J 160 J 320 J

20 Which of the following materials is non-magnetic? A B C D

Cobalt Zinc Iron Steel

7 21

Which of the following is least likely to be used in a titration experiment?

22

23

24

A

pipette

B

burette

C

spatula

D

indicator

Which of the following is soluble in water? A

silver chloride

B

barium sulphate

C

iron(II) hydroxide

D

sodium carbonate

Which of the following properties shows that a sample of water is pure? A

Water is colourless and odourless.

B

Water boils at 100 oC at a given pressure.

C

Universal indicator remains green in water.

D

Water turns anhydrous copper(II) sulphate blue.

What mass of oxygen combines with 20g of calcium? A

4g

B

8g

C

16g

D

32g

8 25

Magnesium burns in air to produce magnesium oxide. Which of the following equations best represents this reaction?

26

A

2Mg + O2 → 2MgO

B

2Mg + O2 → Mg2O2

C

2Mg + 2O → 2MgO

D

Mg2 + O2 → Mg2O2

Uranium tetrafluoride can be reduced to uranium metal by heating with magnesium metal. 2Mg + UF4 → U + 2MgF2 How many grammes of uranium can be formed from 12g of magnesium? [Relative atomic masses: Mg, 24; U, 238]

27

A

35.5

B

59.5

C

85.5

D

119

Which salt can be prepared by the reaction of a soluble metal hydroxide and dilute hydrochloric acid?

28

A

potassium chloride

B

sodium nitrate

C

iron(III) chloride

D

copper(II) hydroxide

Which of the following is NOT a chemical change? A

crystallisation

B

fermentation

C

neutralisation

D

combustion

9 29

Substance X turns iron(II) chloride solution brown and decolourises acidified aqueous potassium manganate(VII) How is the behaviour of X described?

30

A

It is a reducing agent only.

B

It is an oxidising agent only.

C

It is both an oxidising and a reducing agent.

D

It is neither an oxidising nor a reducing agent.

Which process is exothermic?

solid A

liquid

D

B

gas

C 31

Which of the following method is not suitable to prevent bicycle gears from rusting? A

painting

B

greasing

C

galvanizing

D

use of stainless steel

10 32

Experiments are carried out to arrange metals P, Q and R in order of increasing reactivity. The table below shows the results. Experiment

P

Q

R

Reaction with dilute acid?

yes

no

yes

Is the metal oxide reduced by carbon?

no

yes

yes

What is the correct arrangement in order of increasing reactivity?

33

A

P, R, Q

B

Q, P, R

C

Q, R, P

D

P, Q, R

The table contains four elements and their atomic numbers.

Element

S

T

U

V

Atomic number

8

13

18

20

Which two elements are in the same period of the Periodic Table? A

S and T

B

T and U

C

U and V

D

S and V

11

34

35

Combustion is an exothermic reaction. What is meant by ‘exothermic’? A

A reaction that involves organic compounds.

B

A reaction that releases energy to the surroundings.

C

A reaction that burns with the presence of oxygen gas.

D

A reaction that absorbs heat energy from the surroundings.

Which of the following oxides does not react with both acidic and alkaline solutions?

36

37

A

lead(II) oxide

B

iron(II) oxide

C

zinc(II) oxide

D

aluminium oxide

Which of the following is false for a polyunsaturated compound? A

It has more than one carbon-carbon double bond.

B

It belongs to the homologous series of alkene.

C

It will decolourise aqueous bromine.

D

It is an addition polymer.

Which of the following is most likely not to speed up the production of carbon dioxide gas during fermentation? A

use a higher temperature

B

use catalyst with smaller particle size

C

use a higher concentration of sugar solution

D

use a method that requires lower activation energy

12 38

Which substance is formed when propanol, C3H7OH is oxidized by acidified potassium manganate(VII)?

39

40

A

C3 H8

B

C3H7ONa

C

C2H5COOH

D

C2H5CO2Na

How can margarine be made from vegetable oils? A

by the cracking of a large hydrocarbon

B

by the substitution of hydrocarbon with halogen

C

by the addition of steam to an unsaturated hydrocarbon

D

by the addition of hydrogen to an unsaturated hydrocarbon

What is the key reason for petroleum gas to be more expensive than liquid petrol? A

Petroleum gas can burn easier than petrol.

B

Petroleum gas is harder to store as compared to the liquid petrol.

C

Petroleum gas molecules can move faster than liquid petrol molecules.

D

Petroleum gas is a pure compound but liquid petrol is a mixture of liquids.

End of Paper 1