2013 NSC Preliminary Level Questions Set - Private & Confidential.pdf

8/14/2019 2013 NSC Preliminary Level Questions Set - Private & Confidential.pdf

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a. Name (in full as per I/C)

b. Identification Card No.

c. Phone No.

d. Email Address

e. Name of Schoolf. Address of School

g. Postal Code City

h. Name of other two Team Members(i)(ii)

i. Name of the Mentor Teacher

PLEASE READ THE INSTRUCTIONS CAREFULLY BEFORE ANSWERING THE QUESTIONS.

1. The challenge comprises of 40 objective questions, 3 subjective questions and 1 written essay.

2. It must be conducted in an exam format and participants are required to answer all the

questions individually. Discussion is not allowed.

3. Participants will be given 2 hours to complete this challenge.

4. Questions provided are in Englishlanguage. Therefore, participants MUSTanswer all questions

in English.

5. Participants are allowedto answer all questions using ballpoint pen.

6. Usage of calculators, text books and reference books are PROHIBITED.

7. Please ensure that your details are correctly filled and duly completed before submission.

8. Answer forms submitted with insufficient information WILL NOT BE EVALUATED.

9. All entries MUST besubmitted to the Academy of Sciences Malaysia, latest by 10 APRIL 2013.

10.Decisions made by the judges are FINAL.


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2013 NATIONAL SCIENCE CHALLENGE Preliminary Level 3 April 2013

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PART A - OBJECTIVE QUESTIONS

1. Which of the following is NOTan example of the use of diamonds in industries?

[A] Electrode in fuel cell. [C] Abrasion resistant coating for

cutting tools.

[B] Polishing of silicon wafer. [D] Thermal conductor in electronics.

2. What is the absolute value of -4?

[A] [C]

[B]

[D] 4

3. Which of the following molecules DO NOT function as a carrier in the human

blood circulation system?

I. Haemoglobin.

II. Fibrinogen.

III. Albumin.

IV. Immunoglobulin.

[A] I and III [C] I, II and III

[B] II and IV [D] II, III and IV

4. The diagram below shows a longitudinal section of the human heart.

In which compartment does deoxygenated blood enter first?

[A] W [C] Y

[B] X [D] Z

5. Which of the following does not have the ability to allow users to communicate

with another computer?

[A] Network card [C] Video Graphic Arrays port

[B] Serial port [D] Modem


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6. Name the famous scientist who first discovered that earth orbits the sun.

[A] Isaac Newton [C] Albert Einstein

[B] John Dalton [D] Nicolaus Copernicus

7. What range of frequencies is usually referred to as audio frequencies for humans?

[A] 0 to 20 Hertz [C] 200 to 200,000 Hertz

[B] 20 to 20,000 Hertz [D] 10,000 to 20,000 Hertz

8. Given that a circle has 2 radians, how many degrees are equal to

radians?

[A] 6 [C] 15

[B] 12 [D] 20

9. A woody plant that has a complete ring of bark removed from its stem dies after a

few months. Which statement explains the situation?

[A] The leaves cannot carry out

photosynthesis.

[C] Sugar is not transported to the

roots.

[B] Sugar leaks out from the ring of

bark.

[D] Parasites attack the stem that is

exposed to the atmosphere.

10. For reactions to occur, the particles of the reactants must collide. The fewer the

collisions that take place, the slower the rate of a reaction. Which of the following

decreases the frequency of collision between reactant particles?

[A] For reactions involving gaseous

reactants, a decrease in the

pressure of the gases.

[C] For reactions involving solutions,

raising the concentration of the

solution.

[B] Raising the temperature of the

reaction mixture.

[D] If a solid is reacting with a liquid,

breaking the solid into smaller

pieces.

11. Where is the center of gravity of a triangular body situated?

[A] Vertex [C] Centroid

[B] Orthocentre [D] Circumcentre

12. Vitamin B is not a single vitamin but multiple vitamins that normally exist together

in the same foods. Which of the following is NOTVitamin B?

[A] Thiamine [C] Riboflavin

[B] Cobalamin [D] Alanine


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13. An octapeptide was synthesized and used as catalyst in a reaction. How many

peptide bonds would there be in an octapeptide?

[A] 7 [C] 9

[B] 8 [D] 10

14. Name the everyday household chemicals that should never be mixed.

[A] Baking soda and vinegar. [C] Ammonia and vinegar.

[B] Bleach and liquid detergent. [D] Ammonia and bleach.

15. Which of the following is FALSEabout reflex arc?

[A] Knee-jerk reflex is an example. [C] It includes the pupil constriction

in respond to bright light.

[B] It is involuntary in nature. [D] It involves cerebrum.

16. In an electrolytic process of a molten salt, what happens to the anion and where

does it occur?

[A] Undergoes reduction at the anode. [C] Undergoes reduction at the

cathode.

[B] Undergoes oxidation at the anode. [D] Undergoes oxidation at the

cathode.

17. Which of the following is characteristic of a client-server network?

[A] A host computer transfers data to

client computers by means of a

token of code.

[C] Application files installed on a

client computer can access data

files stored on a host computer.

[B] A host computer can be used only

for tasks that cannot be performed

by a client computer.

[D] All computers on a network can

perform the duties of both a host

and a client.

18. What type of graph is represented by this equation:

?

[A] Circle [C] Hyperbola

[B] Ellipse [D] Parabola

19. The first synthetic dye named as mauve was produced by reaction of aniline with

potassium dichromate and mixed with a compound. Name the compound.

[A] Acid [C] Alcohol

[B] Alkaline [D] Ammonia


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20. Which of the following changes are true when a person carries out strenuous

exercise?

[A] A [C] C

[B] B [D] D

21. Which experiences the least electrical force in an electric field?

[A] Electron [C] Gamma ray

[B] Beta particle [D] Alpha particle

22. Which ONE of the following expressions does not equate to a common physical

quantity?

[A]

[C]

[B]

[D]

23. Which of the following is true about stem cells?I. They are harvested from embryos.

II. They are mature cells.

III. They develop into many different cell types.

IV. They divide without limit.

[A] I only. [C] I, III and IV.

[B] I and II. [D] All of the above

24. What is the name of the process that produces pyruvate from glucose?

[A] Glycolysis [C] Glycogenesis

[B] Glycogenolysis [D] Gluconeogenesis

25. The 2010 Nobel Laureates in Chemistry were awarded for discovering more

efficient ways of joining carbon atoms together. What substance was used to kick-

start the chemical reactions?

[A] Fe [C] Pd

[B] Cu-Zn [D] Ag


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26. Which pair of the hormone and their function is incorrect?

[A] A [C] C

[B] B [D] D

27.

is equivalent to

[A]

[C]

[B]

[D]

28. The Royal Selangor is famous for its pewter. Which statement below best

describes what pewter is?

[A] Pewter can be considered as a

metamaterial.

[C] Pewter is an alloy.

[B] The chemical symbol for pewter is

Pw.

[D] Pewter can be obtained from the

mineral bauxite.

29. The periodic table is arranged in vertical rows (group) and horizontal rows

(period). The element X and Y are in the same period but in groups 14 and 16

respectively. Which statement is true about X and Y?

[A] Y has two extra electrons than X in

its valence shell.

[C] Y is twice more electronegative

than X.

[B] Y has two more electron shell than

X.

[D] Y has six electrons while X has

four.

30. What are the following micro-nutrients involve in the chlorophyll formation?

I. Boron

II. ManganeseIII. Molybdenum

IV. Zinc[A] I, II and III [C] II and IV

[B] I, III and IV [D] I, II, III and IV

31. If log10x = 3, then x = ?

[A] 310

[C] 30

[B] 1000 [D]


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32. A tram passenger is lurching backward when a stationary tram starts to

accelerate. The backward motion of the passenger is due to __________

[A] Momentum [C] Conservation of energy

[B] Inertia [D] Conservation of force

33. Which of the following plant's feature maximizes its exposure to sunlight?

[A] Waxy leave surface [C] Stoma under the leaves

[B] Leaf Mosaic [D] Thin leaf

34. The electrolysis processes can only be done on solutions or molten materials.

Why?

[A] The product is a gas. [C] The ions must be free to move to

electrodes.

[B] Electrons cannot flow through

solids.

[D] Less energy is needed.

35. Which of the following elements exhibit the greatest electrical conductivity?

[A] As [C] P

[B] Ge [D] Sn

36. In 2010, Physics Laureates Andre Geim and Konstantin Novoselov managed to

obtain a flake of carbon just one atom thick to form graphene. How did they do

this?

[A] By using electrochemical cleavageassisted process.

[C] By using catalytic chemicalreaction.

[B] By using regular adhesive tape. [D] By using mechanical abrasion.

37. Which of the following islands visited by Charles Darwin have provided him with

evidence for species variations which formed the basis for the evolution theory?

[A] Fiji Islands. [C] Carribean Islands.

[B] Galapagos Islands. [D] Seychelles Islands.

38. What does the term vertex in Optics means?

[A] Intersection of two or more lines. [C] Highest point.[B] Intersection of optical axis with

lens surface.

[D] Termination line.


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39.

The figure above shows the change of pressure in the lungs for one complete

respiratory cycle. Which are the following processes involved in Y?

I. The internal intercostal muscles relax.

II. Rib cage moves downwards and inwards.

III. Air is forced out of lung.

IV. Diaphragm flattens.

[A] I and IV [C] I, II and III

[B] II and III [D] II, III and IV

40. An experiment was carried out to dissolve small limestone granules in

hydrochloric acid. Carbon dioxide gas is formed and was collected. The initialresults are marked as the 'original experiment'. The experiment was repeated

after varying the reaction conditions. The rate of the reaction is the rate at which

carbon dioxide is formed. Which experiment is undergoing at an approximate

average rate of 22 cm3min

1in the first half minute of the reaction?

[A] Graph line for experiment W [C] Graph line for experiment X

[B] Graph line for experiment Z [D] Graph line for experiment Y


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PART B - SUBJECTIVE QUESTIONS

1. A student discovered two unlabelled bottles containing two different compounds. He

was tasked by his supervisor to identify them. The structures of the two compounds are

displayed below. Answer the following questions.

a) Provide the correct IUPAC name for the two compounds, Aand B:

Name: _____________________________

Name: _____________________________

b) Suggest which compound would have a higher boiling point. Explain.

c) Suggest a chemical test that could be done and the observation you would expect to

observe in order to distinguish compounds A and B so that the bottles could be

properly labelled.

d) Compound B was reacted with acidic solution of potassium permanganate. Draw

the structure of the product that will be formed.


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2. Malaysia is a Party to the United Nations Framework on Climate Change and has ratified

the Kyoto Protocol on 4 September 2004. At present, Malaysia has no quantitative

commitments under the Kyoto Protocol but through the Clean Development

Mechanism (CDM), Malaysia voluntarily participates in reducing emissions of

greenhouse gases such as carbon dioxide which induce global warming.

(a)Define carbon footprint, carbon source and carbon sink.

(b)List three effects of global warming around the oceans of Malaysia.

(c) State and discuss two ways to curb CO2emission.

3. The brain is the centre of the nervous system and controls most body functions. Brain

cells or neurons are highly specialised cells, which cannot undergo cell division.

Generally, a dead neuron cannot be replaced.

a) Describe three (3) aspects of the human body that are designed to protect the

brain.

b) Think of the neuron as an electrical wire with connections. Discuss the elements you

would incorporate into its design for it to perform its functions.


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PART CESSAY

In the modern day nanotechnology affects our daily life. In 300 words, discuss on the

positive and negative effect of this technology to humankind and the environment.

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2013 NSC Preliminary Level Questions Set - Private & Confidential.pdf