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

LEVEL

SECONDARY 4 EXPRESS / 5 NORMAL (ACADEMIC)

DURATION :

:

:

03 Sep 2009 1 HOUR

INSTRUCTIONS TO CANDIDATES DO NOT OPEN THIS BOOKLET UNTIL YOU ARE TOLD TO DO SO. 1. 2.

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. 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

Answer all questions. Shade your answers in the OTAS 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 B C D

2

0.7 mm 0.9 mm 3.7 mm 3.9 mm

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 B C D

0.5 s 1.0 s 1.5 s 2.0 s

2

Science (Physics) 2009

3

Sec 4E5NA

Two forces 3N and 4 N, act on a point P as shown in the diagram below. 3N

P 60o

4N

Which vector diagram shows the correct resultant force F of the two forces? 3N

A

3N

B

60o

60o

F

F

4N

4N

3N

C

3N

D

120o

120o

F

F

4N

4N

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. Q

R

1.0 m/s

60 m

current 1.2 m/s

P The distance QR is A

C

30 m 60 m

B D

50 m 72 m

3

Science (Physics) 2009

5

Sec 4E5NA

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. 9 kg

1 kg

45 m 5m

A

6

0s

B

2.0 s

C

4.0 s

D

8.0 s

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?

4

Science (Physics) 2009

7

Sec 4E5NA

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? F 45 o

F

P 4m

8

B

4m

P

4m

4m

C

F 45 o

D

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 B C D

9

P 4m

A

4m

P

4m

4m

F 45o

8N 33 N 40 N 240 N

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

5 m

B 7.8 m/s

3 m

C 10 m/s D 100 m/s

1 m

5

Science (Physics) 2009

10

Sec 4E5NA

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 24 0 N

aa

A A

Given that the area of a is 10 cm2, what is the area of A? A 20 cm2

11

B 40 cm2

C 60 cm2

D 120 cm2

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.

70 N 1.0 m

12.0 m

30 kg

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

300 J

B

360 J

C

540 J

D

840 J

6

Science (Physics) 2009

Sec 4E5NA

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

7

Science (Physics) 2009

14

Sec 4E5NA

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 B C D

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 B C D

16

Air molecules collide with smoke particles. Convection currents cause the air to move. Draughts cause the smoke particles to move. Smoke particles gain kinetic energy from the light.

0.306 m 3.06 m 6.12 m 12 x 105 m

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?

8

Science (Physics) 2009

17

Sec 4E5NA

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

B

18

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

B

A 240 V

76 Ω

36 Ω

240 V

C

D 96 Ω 240 V

19

D

C

240 V

76 Ω

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 / mm2

A

0.50

2.0

B

0.50

0.5

C

0.25

2.0

D

0.25

1.0

9

Science (Physics) 2009

20

Sec 4E5NA

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 B C D

Upwards. Downwards. Perpendicularly into the paper. Perpendicularly out of the paper.

10

Science (Physics) 2009

Sec 4E5NA

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 B C D

filtration sublimation crystallization fractional distillation

22 Which of the following gas collection is most suitable for nitrogen gas? A B C D

displacement of water upward air displacement downward gas delivery 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?

11

Science (Physics) 2009

Sec 4E5NA

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

Potassium chloride has a molecular structure and calcium oxide has a crystal lattice structure. Potassium is more reactive than calcium. The melting point of potassium is lower than that of calcium. 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 B C D

4 to 1 8 to 1 2 to 1 1 to 4

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

10 13 20 22

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

ZnF2 AlF3 SiF4 NaF

12

Science (Physics) 2009

Sec 4E5NA

28 Which combination of chemicals will produce a salt by the titration method of preparation? A B C D

sulphuric acid and sodium hydroxide hydrochloric acid and calcium carbonate copper oxide and nitric acid zinc powder and hydrochloric acid

29 Which reaction will produce a precipitate? A B C D

K2CO3 ( aq ) + 2HCl ( aq ) ZnO ( s ) + 2HCl ( aq ) NH4OH ( aq ) + HCl ( aq ) AgNO3 ( aq ) + HCl ( aq )

30 Which statement is not true about the Periodic Table? A B C D

The metallic nature of elements decreases from left to right across a period and increases down the group. Fluorine is the least reactive non-metal and francium, is the most unreactive metal. Elements near the dividing line between metals and non-metals have both metallic and non-metallic properties. 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?

13

Science (Physics) 2009

Sec 4E5NA

32 Which set of substances below has an incorrect oxidation number? A B C D

hydrogen in HCl : +1 magnesium in MgCl2 : +2 oxygen in Cu2O : -2 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 → ZnCl2 + 2H2O What property of zinc hydroxide is shown in the reactions above? A B C D

alkaline property reducing property amphoteric property oxidizing property

34 Ammonia solution,NH4OH is a weak alkali. Which of the following particles are mostly present in the solution of ammonia? A B C D

NH3 NH4+ H+ OH-

35 Which statement is not true about the gas nitrogen dioxide? A B C D

It is a choking brown fumes gas less dense than air. It forms acid rain when dissolves in rain water. It is released by burning fuel in combustion engines. It is harmful to human health causing respiratory problems.

14

Science (Physics) 2009

Sec 4E5NA

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 ║ I C – O –C – H I H

H

A B C D

H

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

chloromethane ethanol ethene ethanoic acid

15

Science (Physics) 2009

Sec 4E5NA

38 The structure of four organic compounds are shown.

Which compounds can react with sodium carbonate to give carbon dioxide? A B C D

1 and 2 2 and 4 1 and 3 1 only

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

A B C D

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

16

Science (Physics) 2009

40

Sec 4E5NA

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

-End of paper-

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Science (Physics) 2009

Sec 4E5NA

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