5116 Prelim P1 St Patrick 09

NAME CLASS INDEX NO.

ST. PATRICK 'S SCHOOL PRELIMINARY EXAMINATIONS 2009

SUBJECT : SCIENCE (PHYSICS/CHEMISTRY) 5116 PAPER 1

DATE : 03 Sep 2009

LEVEL : SECONDARY 4 EXPRESS / 5 NORMAL (ACADEMIC)

DURATION : 1 HOUR

INSTRUCTIONS TO CANDIDATES DO NOT OPEN THIS BOOKLET UNTIL YOU ARE TOLD TO DO S O. 1. Write your name, class and index number on the Question Paper and the OTAS

sheet provided. Shade your register number clearly on the OTAS sheet. 2. There are 40 questions on this paper. Answer all questions.

3. Calculators may be used where necessary.

INFORMATION FOR CANDIDATES: Take acceleration due to gravity, g = 10 m/s2. For Examiner’s Use Only

Section Total (40 m) Grade Score

Teacher’s comments (if any): _________________________________ Parent’s / Guardian’s Signature: ___________________ Date: ___________

This question paper consists of 18 printed pages including this cover page.

Science (Physics) 2009 Sec 4E5NA

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Answer all questions. Shade your answers in the OTA S sheet provided. 1 A pair of vernier calipers is used to measure the width of a metal cube as

shown below. If the zero error is -0.2 mm, what is the actual width of the cube? A 0.7 mm B 0.9 mm C 3.7 mm D 3.9 mm

2 The bob of a simple pendulum is pulled slightly to one side and released. The

motion during its swing is shown in the graph below.

What is the value of the period of the pendulum? A 0.5 s B 1.0 s C 1.5 s D 2.0 s


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3 Two forces 3N and 4 N, act on a point P as shown in the diagram below. Which vector diagram shows the correct resultant force F of the two forces?

A B C D

4 A swimmer starts at point P and swims at 1.2 m/s across a river in the

direction towards Q. Q is directly facing P, on the opposite bank of the river of width 60 m. The current in the river is 1.0 m/s. When the swimmer finally reaches the opposite bank, he discovers that he is at R instead of Q.

The distance QR is

A 30 m B 50 m C 60 m D 72 m

3 N

60o

3 N

F F

3 N

60o

3 N

F

3 N

F

120o 120o

P

4 N

60o

4 N 4 N

4 N

4 N

Q R 1.0 m/s 60 m

current 1.2 m/s P


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5 Two metal spheres with a mass of 9 kg and 1 kg respectively are at their initial heights as shown in the diagram below. The two spheres are released at the same time. Calculate the difference in time when the two balls touch the floor.

A 0 s B 2.0 s C 4.0 s D 8.0 s

6 A bus travels at a constant speed of 15 m/s for 4.0 s. The driver applies the

brakes to bring the bus to rest with uniform retardation in a distance of 30 m. It remains stationary for 2 s and then accelerates uniformly to reach a speed of 10 m/s in 2 s. Which one of the following speed-time graphs correctly represents the entire motion of the bus?

45 m

5 m

9 kg 1 kg


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7 A force F is applied to an L-shaped metal rod hinged at P as shown. In which diagram is the moment about P greatest?

4m

4m

4m

4m

4m

4m

4m

4m

FF

45o

F45o

F45o

P P P P

A B C D 8 As shown in the diagram below, a winch is used to lift a box of weight 200 N.

Calculate the effort that is being applied at this instant.

A 8 N B 33 N C 40 N D 240 N

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A boy throws a ball into the air from the height as shown. What is the speed of the ball just before it hits the ground? (g = 10 m/s2) A 4.5 m/s

B 7.8 m/s

C 10 m/s

D 100 m/s

1 m

3 m

5 m


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10 A simple hydraulic jack is used to lift heavy objects using a small amount of force. In the diagram below a 240 N weight is lifted by using only 20 N of force.

20 N

240 N

a A

Given that the area of a is 10 cm2, what is the area of A?

A 20 cm2 B 40 cm2 C 60 cm2 D 120 cm2 11 A wooden block of mass 30 kg is pulled up a rough inclined plane at a constant

speed by a force of 70 N. When the distance moved along the plane is 12.0 m, the increase in height is 1.0 m.

Calculate the work done to move the block up the inclined plane.

A 300 J B 360 J C 540 J D 840 J

a A

70 N

12.0 m

1.0 m

30 kg


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12 A student looks into mirror M to view the image of an object O hidden behind a wall. At which of the positions, A to D, is the image?

13 For a certain parallel-sided glass block, the value of the critical angle for the

glass block is 41.8o. A ray of light passes through the block and emerges at an angle of 60.0o to the surface of the block.

What is the value of the angle marked X? A 19.5o B 20.0o C 35.3o D 48.5o


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14 The diagram shows an experiment to look at the behaviour of smoke particles in air.

Why is each smoke particle seen to move about at random?

A Air molecules collide with smoke particles. B Convection currents cause the air to move. C Draughts cause the smoke particles to move. D Smoke particles gain kinetic energy from the light. 15 A VHF radio station broadcasts at a frequency of 98.0 MHz . The speed of

radio waves is 3.0x108 m/s. What is the wavelength of the radio waves?

A 0.306 m B 3.06 m C 6.12 m D 12 x 105 m

16 The graph below shows how the temperature of some wax changes as it cools

from the liquid state to solid state. At which labeled point would the wax be a mixture of liquid and solid?


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C

A

17 At which point in the circuit will the current be the smallest, assuming all the light bulbs are identical?

18 In which circuit will the light bulb labelled 12V, 36 W light up with normal

brightness?

19 A piece of wire 0.5 m long has an area of cross-section of 1 mm2. What wire of

the same material has twice the resistance?

Length / m Area / mm 2

A 0.50 2.0

B 0.50 0.5

C 0.25 2.0

D 0.25 1.0

96 Ω 76 Ω

76 Ω

B D

240 V 36 Ω 240 V

240 V 240 V

A

C

B

D


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20 A beam of electrons passes through a pair of electromagnets as shown.

In which direction will the beam be deflected when it enters the gap between the electromagnets?

A Upwards. B Downwards. C Perpendicularly into the paper. D Perpendicularly out of the paper.


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21 The equation for the reaction between aqueous silver nitrate and aqueous

sodium iodide is shown.

AgNO3 ( aq ) + NaI ( aq ) → AgI ( s ) + NaNO3 (aq ) Which method could be used to separate the products? A filtration B sublimation C crystallization D fractional distillation

22 Which of the following gas collection is most suitable for nitrogen gas?

A displacement of water B upward air displacement C downward gas delivery D downward water displacement

23 The diagrams show mixtures of chemicals that react to produce gases. In which of the following does the litmus paper change colour?


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24 Which statement explains why potassium chloride, KCl, has a lower melting point than calcium oxide, CaO?

A Potassium chloride has a molecular structure and calcium oxide has a

crystal lattice structure. B Potassium is more reactive than calcium. C The melting point of potassium is lower than that of calcium. D The electrostatic force of attraction between the ions, K+ and Cl- is

weaker than that between ions of Ca2+ and O2-.

25 What is the ratio of the volume of 8 g of hydrogen to the volume of 32 g of

oxygen, both volumes at r.t.p?

A 4 to 1 B 8 to 1 C 2 to 1 D 1 to 4

26 Mg2+ ion has the same electronic configuration as the ion formed by the element with proton number

A 10 B 13 C 20 D 22

27 Which compound contains the greatest percentage of fluorine by mass in a 20 g sample?

A ZnF2

B AlF3

C SiF4

D NaF


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28 Which combination of chemicals will produce a salt by the titration method of preparation?

A sulphuric acid and sodium hydroxide B hydrochloric acid and calcium carbonate C copper oxide and nitric acid D zinc powder and hydrochloric acid

29 Which reaction will produce a precipitate? A K2CO3 ( aq ) + 2HCl ( aq ) B ZnO ( s ) + 2HCl ( aq ) C NH4OH ( aq ) + HCl ( aq ) D AgNO3 ( aq ) + HCl ( aq )

30 Which statement is not true about the Periodic Table?

A The metallic nature of elements decreases from left to right across a

period and increases down the group. B Fluorine is the least reactive non-metal and francium, is the most

unreactive metal. C Elements near the dividing line between metals and non-metals have

both metallic and non-metallic properties. D The first period contains two elements, helium and hydrogen.

31 The thermometers show the temperature at which the reaction started in each beaker. In which beaker will the reaction be fastest?


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32 Which set of substances below has an incorrect oxidation number?

A hydrogen in HCl : +1 B magnesium in MgCl2 : +2 C oxygen in Cu2O : -2 D carbon in CO2 : +2

33 Zinc hydroxide will react both with sodium hydroxide and hydrochloric acid to form the products shown in the equation below.

Zn(OH)2 + 2NaOH → Na2Zn(OH)4 Zn(OH)2 + 2HCl → ZnCl 2 + 2H2O

What property of zinc hydroxide is shown in the reactions above? A alkaline property B reducing property C amphoteric property D oxidizing property

34 Ammonia solution,NH4OH is a weak alkali. Which of the following particles are

mostly present in the solution of ammonia?

A NH3

B NH4+

C H+ D OH-

35 Which statement is not true about the gas nitrogen dioxide? A It is a choking brown fumes gas less dense than air. B It forms acid rain when dissolves in rain water. C It is released by burning fuel in combustion engines.

D It is harmful to human health causing respiratory problems.


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36 Which part of the organic compound shown below shows that it is more reactive than an alkane?

H H C C

3222222 q O H I

H C – O –C – H I H

A carbon to hydrogen bond B carbon to COOCH3 bond C carbon to carbon double bond D carbon to oxygen bond

37 The catalytic cracking for “thicker” oils can be carried out using the apparatus below. What is the gaseous mixture collected which is inflammable and undergoes addition reaction with chlorine?

A chloromethane B ethanol C ethene D ethanoic acid


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38 The structure of four organic compounds are shown.

Which compounds can react with sodium carbonate to give carbon dioxide? A 1 and 2 B 2 and 4 C 1 and 3 D 1 only

39 Compound G below can be converted to compound A by the process of

A addition polymerization. B reduction using iron metal. C air oxidation in the presence of bacteria. D addition reaction with oxygen gas.


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40 Which of the following pairs shows the correct monomer for making the polymer?

-End of paper-


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5116 Prelim P1 St Patrick 09