Chemistry form 4

454U1ChemistryPaper INovember2012I % hour

FINAL SEMESTER 2 EXAMINATION 2012

MAKTAB RENDAH SAINS MARAFORM 4

CIIEMISTRYPAPER I

I hour 15 minutes

DO NOT OPEN THIS BOOKLET UNTIL BEING TOLD TO DO SO

L This question paper consists of 50 questions.

2. Answer all questions-

3. Answer each question by blackening the correct space on the answer shest'

4. Blacken only one sPace'

5. If you wish to change your answer, erase the blackened mark that you have made'

Then blacken the space for the new answer'

6. The diagram in the questions provided is not drawn to scale unless stated'

7. You may use a non-progwrmmable scientific calculator'

This question paper consists of2l printed pages including the front page

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www.myschoolchildren.commore examination papers at :

Question Lo Question 50 are followed by four options +.B,C orD'choose the best option for each qlestion and blackened the corresponding sPace on the obiective

answer sheet.

l. which of the following scientists is involved in the development of the Periodic Table?

A Neils Bohr

B John Dalton

C James Chadwick

D Henry J.G. MoseleY

2. Group l8 elements are known as

A halogens

B noble gases

C alkali metals

D transition metals

3. Which ofthe following elements are in Group l? in the Periodic Table of Elements?

A Fluorine and bromineB Chlorine and xenonC Bromine and neon

D Fluorine and helium

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4. Metal of Group I elements react with water' Which statement is true?

A All the metals react vigorously

B The reaction Produoes white flame

C Solution produced turns red litmus paper to blue

D The gas released ignites a burning wooden splinter

5. Which statements are true about the properties of elements across Period 3?

I Metallic ProPerties decreases

Il EleotropositivitY increases

III Proton number increases

IV Atomic size decreasesi

A I and IlB II and III

C I, III, and IV

. D II, III, and IV

6. During the formation of ionic bonds, the atoms ofelements

A transfer electrons

B donate electrons

C accept electrons

D share electrons

7. Which substance.is a covalent compoun$l

A HYdrogen chloride

B Magnesium oxide

. C Sodium chloride

D Lithium oxide

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9. Diagram 1 shows the formation ofa compound.

4

8. Which statement describes a covalent bond?

A Van der Waals forces between non metal atoms

B Transfer ofelectron between metal and non metal atom

C Metal atom donate electron to achieve a stable electron arrangement

D Non metal atoms share electron to achieve a stable electron arrangement

Calcium chloride

Diagram I

Which of the following compound has the same type of bond as the compound formed in

Diagram l?

A Sulphur dioxide

B Carbon disulphide

C Hydrogen chtoride

D Potassium sulphide

10. Which statement explains why a covalent compound d&s not conduct electricity?

A Insoluble in water

B Ions present are not free

C Consist of neutral molecules

D Insoluble in organic solvents

I l. Which of rhe following substance is an electrolyte?

A Chlorine gas, Cl2

B Hydrochloric acid, HCI

C Carbon tetrachloride, CClr

D Phosphorus pentachloride, PCls

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12. Which ofthe following ions are present in copper(Il) sulphate solution?

A Cul* and H* ions

B Cu2* and So+2- ions

C Cu2*, so+z- and H" ions

D cu?*, soq2-, H* and olf ions

13. Diagram 2 shows the apparatus set-up for the electrolysis of t '0 mot dm-3

silver nitrate solution.

.0 mol dm-3 silver nitrate solution

Diagram 2

'i

Which of the following are the ions that attracted to anode?

A Ag* ions

B NOs- ions

C Ag* and Ff ions

D NO3- and OH- ions

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14. Diagram 3 shows the apparatus set-up ofa voltaic cell that isthe electrodes.

made up of iron and zinc as

0.1 mol dm-r

Zinc

0.1 mol dm-3

zinc nitrate solutioniron(ll) nitrate solution

. Salt bridge

Diagram 3

What is the direction of the electron flow in the cell?

A From zinc to iron electrode through salt bridge

B From iron to zinc electrode through salt bridge

C From zinc to iron electrode through extemal circuit

D From iron to zinc electrods tfuough external circuit

15. Diagram 4 shows the apparatus set-up ofa voltaic celt that is made up ofmagnesium and

metal X as the electrodes.

Magnesium MCTAI X

Dilute hydrochloric acid

Diagram 4

Which of the following metal gives the highest voltage reading?

A

B

C

D

Iron

Silver

Copper

Aluminium

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16. Which particle enables acids to show its properties?

A Hydroxide ion

B HYdrogen ion

C HYdrogen atom

D HYdrogen molecule

17. Which of t}le following gases will change damp litmus paper from red to blue?

A OxYgen

B Ammonia

C Carbon dioxide

D HYdrogen chloride

18. Which of the following are strong acids?

I HYdrochloric acid

II SulPhuric acid

III Ethanoic acid

IV Nitric acid

A I and IlB lI and III

C I, II and IV

D II, III and IV

19. A student is stung by an insect with an alkaline sting'-l Whi.h substancels iuitable to treat tlie student?

A Vinegar

B Detergent

C ToothPaste

D Baking soda

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20. Table I shows the pH values offour solutions with the same concentration'

Solution pH valueP 1.0

a 2.0R 4.5

S 6.5

Table I

Which solution has the lowest concentration ofhydrogen ions?

APBQCRDS

21. Which substance is used by farmers to remove excess acidity in the soil?

A Calcium nitrate

B Calcium chloride

C Calcium sulphate

D Calcium hydroxide

22. Which substance is a soluble salt?

A Silver chloride

B Zinc carbonate

C Sodium nikate

D Barium sulphate

23. Which salt is prepared through precipitation?

A Lead(II) iodide

B Barium chloride

C Potassium iodide

D Ammonium chloride

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24. Which salt can be prepared by reacting a metal with a dilute acid?

A Silver nitrate

B Lead(ll) nitrate

C CoPPer(II) sulPhate

D Magnesium sulPhate

25. Which ofthe foltowing reactions represent double decomposition reactions?

I Pb(NOr, + NazSO+ ) PbSOq + 2NaNO:

II Ba(NOr2 + 2KCl ) BaClz + 2KNO3

IV Ba(NO:): + Na2SO4 ) BaSOa + 2NaNG

A I and III

B II and III

C l, III and IV

D ll, III and IV

] 26. Th" follo*ing chemical equation shows a reaction between sodium and oxygen where a

and c are integers.

,rNa+G, ) d--lWhat are the values ofa, c and the formula ofthe product obtained?

a c Formula of Pr9d-uct

4 2 Na2O

2 2 NazO

2., NaOz

4 2 NaOz

B

C

D

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27. Diagrarn Sshows six transition elements in the Poriodic Table of Elernents' Which of the

follJwing is true about the elemene?

Diagram 5

A

B

C

D

Low densitY

Loli mehing Point

High solubilitY in water

High tensile str€ngth

28. The following statements describe the characteristics ofan element'

' Aqueous solution ofan ion are green or brown in oolour

. . Act as a catalyst in the production of ammonta .

. Has Nvo oxidation numbers' +2 and+3'

Which of the follorving is the element?

B Platinum

Nickel

Iron

C

D

29, Diagram 6 shows the electron anangellent of element X and Y. Which of the bondingtype and formula is true for compound for.med bctween the two elements?

A

B

C

Formula

XY

XYz

XY

XYz

Diagram 5

Bonding'tYPe

ionic bond

.ionic bond

. covalent bond

covalent bondD


l2

' 30. Table 2 shows the proton number offour elements'

Table 2

Atom Y has 3 shells occupied with electrons. Element Y reacts with chlorine to form

compound T which has strong electrostatic forces.

Which of the following shows element Y and the chemical formula of T?

Element Y

A Lithium

B Calcium

' C Magaesium

D Potassium

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Element Proton number

Lithium3

Magnesiumt2

.Potassiumt9

Calcium20

CompoundT .

YCI

YCIu

YC12

YCI

3l . The following statements are some information about the compound formed between

element P and Q.

o Dissolve in water. High melting point. Solid at room temperature

Which is true about element P and Q?

A P is a metal element and Q is a non melal element

B P and Q have equal number of electrons

C Both P and Q are non - metal elements

D Both P and Q share electrons

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IJ

32. Diagrarn 7 shows apparatus set-up of electrolysis of aluminium oxide' AlzOr'

Molten lead(Il) oxide

Diagram 7

Which ofthe fotlowing is the halfequation at anode and cathode of this process?

33. Diagram 8 shows apparatus set-up for electrolysis of0'l mol din-3 sodium nitrate solution

using Platinum electrodes'

0.1 mol dm-3 sodium nitrate solution

Diagram 8

Which of the following pairs of ions that will be selected discharged at anode and

cathode?

pb2* + 2e --+ Pb

pbz* + 2e --r Pb

Pbz" + 2e '-, Pb

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A

B

C

D

Anode Cathode

No:- Na'

oH- Na'

oH-=--

NOr- H'


34. Diagram 9 shows electrolysis of 0'1

electrodes-

Copper ele.trode

t4

mol dm-3 copper(Il) sulphate solution using copper

0.1 mol dm-3

copper(Il) sulPhate solution

Diagram 9

Which of the following will be observed at anode after 30 minutes?

B

C

D

Brown solid dePosited

Electrode becomes thinner

Electrode becomes thicker

Colourless gas bubbles released

35. Diagram I 0 shows the apparatus set-up for electroplating an iron key with silver'

Iron key

Diagram l0

What is X?

A Silver nitrate

B Iron(II) nitrate

C silver chloride

D Iron(III) chloride

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36. Diagram I I shows the apparatus set-uP ofa voltaic cell with magnesium and copper as

the electrodes.

CopPer

Copper(Il) sulphate solutionMagnesium

Magnesium nitrate solution

Salt bridge

Diagram 1 I

Whichofthefollowingis.thehalfequationforthereactionatnegativeterminal?

A

B

C

D

M{'+2e"-MgMg--- Mg2* + 2e

Cu2* + 2e -- Cu

Cu --- Cul*+ 2e

37, Which ofthe following substances reacts with calcium carbonate to produce gas bubbles?

A Salt solution

B

cD

Ethanol

Vinegar

Sugar solution

38. Table 3 shows the concentration and pH values oftwo types ofacid'

Table 3

Which statement is true about the acids?

A Mis a weak acid, Nis a strong acid

B Concentration ofhydrogen ion in Mis higher than tr/

C The degree of dissociation ofacid 7f is higher than acid M

D M ionises partially in water, N ionises completely in water

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Type of acid Conc.ntration / mol dm-' pH value

M 0.1 I

N 0.1 6

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39. Which ofthese are suitable reactants for neutralisation reaction?

I Sulphuric acid + sodium hydroxide

tl Hydrochloric acid + copper(Il) oxide

III Sulphuric acid + calcium carbonate

IV HYdrochloric acid + magnesium

A

B

C

D

I and II

I and lV

II and lllIII and lV

40. The word equation below represents a chemical reaction-

What could substance W be?

A Zinc sulphate

B Zinc carbonate

C CoPPe(Il) oxide

D CoPPer(II) hYdroxide

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CONFIDEi'i

Dilute hydrochloric acid + Substance W '

Salt + water * carbon dioxide

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41. Rubidium is below lithium in Group I elements'

What will happen when rubidium reacts with water?

A Reaction produces less gas bubble

B ' Reaction occurs more slowlY

C Produces Yellow flame

D Produces an exPlosion

42. Element X and element Y are located in Group I and Group 17 in tle- nerjo{i1 fatt3 of

Element respectively' X reacts with Y to form a compound' What is the chemrcal rormula or

the compound?

AXYB x2Y

C XY2

D X2Y3

43. Table 4 shows the electron arrangeinents of four atoms'

Table 4

Arrange the elements in increasing order of electronegativity'

A F, AI, CI, K

B F, CI, AI, K

C K, AI, CI, F

D K, CI, AI, F

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l8

44. Table 5 shows the properties ofcompound P' Q and R'

Which of the following represent P, Q and R?

A

B

C

D

I and III and III

II and IV

III and IV

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ProPerties

Soluble in water, does not conduct electricity

Soluble in water, conduct electricity in both

molten and aqueous state.

Compound

P

o

I tnsoluble in water, conduct electricity inI

I molten stateR

Table 5

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45- Diagram

solution.

12 shows f}le apparatus

19

set-up of eleotrolysis of concentrated potassium chloride

Concentratedpotassium chloridesolution

Carbon elechodes

Diagram 12

What is the halfequation at cathode?

A K*+ e- ) K

B 2r{+2€ > H2

C 2Cl' ) Clz+ 2e-

D 4OH- ) 2H2O + 02 +4e

46. What is the volume of distilled water required to be added to 25.0 cm3 of 0.5 mol dm-3

nitric acid in order to produce a solution of 0.1 mol dm-' ?

A

B

C

D

5.0 cm3

12.5 cm3

125-0 cm3

150.0 cm1

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47.Diagraml3 shows the titration of hydrochloric acid and potassium hydroxide solution

0.2 mol dm-3

hydrochloric acid

50 cm3 of 0.I mol dm-3 ofpotassium hYdroxide solution +

phenolphthalein

Diagram 13

What is the volume ofhydrochloric acid needed to neutralize potassium hydroxide

A 25 cm3

B 50 cm3

C 75 cm3

D 100 cm3

48. Diagram 14 shows a chemical cell

Copper plate

Coppe(II)

Copp€r atom loss€s electron to form oopper(Il) ion

Copper(ll) ion acc€pt electron to form copper atom

Zinc ion accept electron to form zinc atom

Zinc storn loses electron to form zinc ion

Zinc plate

Zinc sulPhale solution

sulphate solution

Diagram 14

Whatisthechemicalreaotionthattakesplaceatthepositiveterminalofthechemical

cell?

A

B

C

D

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49. Table 6 shows information about three voltaic cells.

Pair of metals Potential difference (Y) Negative terminal

R and copper 0.44 R

S and copper 110 s

T and copper 0.53 Cu

Table 6

What is t}re potential differenbe for the pair of metal S and T?

A 0.97 V

B 2.14 V

c 2.23 Y

2.67 Y

50. 40 cm3 of 0.5 mol dm'3 nitric acid is added to 50 cm3 of 0.2 mol drr3 sodium hydroxide'Calculate the mass ofthe salt formed in this reaction.

[Relative atomic mass: Na; 23, O; 16, N; 14, H;1]

A 0.85 g

B l l2gC l.7O g

D 2.55 g

END OF QNESTION PAPER

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4541ChemistryPaper 213November20122 Yz hour

FINAL SEMESTER 2 EXAMINATION 2012MAKfAB RENDAII SAINS MARA

FORM4

CHEMISTRY

Paper 2 & 3

Two hours and thifi minutes

do Nor oppN TrrE eUESTIoN BooKLETLINTIL BEING TOLD TO DO SO

L Write your name and oollege number in. the space provided.

2. This question booklet consists of SectionA, B and C.

3. Answer atl question in Section A and C.4. Answer any one question from Section B'

I

5. You may use a non-ProgrammablesciEntific calculator.

6. The diagrams in the questions providedare not dravr'n to scale unless stated.

www,myschoolchildren,com

Section QuestionFullmark

Marks

A

1 t2

2 12

3 12

4 12

B

5 20

6 20

C

l5

8 t7

TOTAL 100

This question booklet contains 17 printed pages.


SULIT )

Section A

148 narksl

Answer all questions in this section.

Table I shows some elements in Period 3 in the Periodic Table of Elements.

Elernent Sodium Aluminium Silicon Chlorine Argon

Proton number 11 l3 t4 l7 18

Table I

Based on Table 1, answer the following questions:

(a) State one element which is

(D metal

(iD semi-metal

(iii) non-metal

13 marksl

Chlorine is in Group 17 in the Periodic Table. State the common name forGroup 17 elemerits.

11 nark)

(c) Write the electron arrangement of sodium atom.

ll narkl

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4541D

L

(b)

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i

-)

State the number of valence electron of argon atom'

4s41/2SULIT

(D(d)

fl mark'l

(iD In which group can you find argon in the Periodie Table?

ll marhsl

(iiD Argon is chemically unreactive. Explain.

12 marksl

(e) (D Which element forms an amphoteric oxide?

I I markl

(ii) Write the chemical formula of the oxide of element in l(eXi)'

Il narkl

(i ii) State one chemical property ofthe oxide in l(e)(ii).

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I-r(-lo1

[E

SULIT 4 4541D

2. Diagram 2 shows the electron arrangement of compound J. Compound J is formedfrom the reaction between element X and element Y. The letters used do not

. represent the actual symbols of the elements.

\iit,l)

Based on Diagram 2:(a) State how Y ion and X ion are formed from their atoms.

Y ion:...........

X ion:...........12 marksj

(b) Write the electron arrangement for atom X and Y

Y:,..--....12 marks"l

(c) State the type ofcompound for J,

ll mark.l

Write the chernical equation for the reaction between element Xand element Y to form compound J.

12 marks'l

(iii) State two physical properties ofcompound J.

a- -\2a -.+- \.i ,.-.,. I t /-.,..-\ Ii{oiiltioiitI \C./ i | \\o/./ I

L j \-_ '-r- )Dirgram2

(i)

(ir)

12 marks'l


SULIT

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4541D

Y exists as diatomic molecules. Draw the electron arrangement for

the molecule,

12 marksl

Name the type of bond in 2(d)(i)'

..,..............-..:,..,-.-..

U narkl

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(d)


SULIT

J.

6 4s4ll2

Diagram 3 shows the apparatus set-up for the electrolysis of 0.001 mol dm-3

hydrochloric acid solution using carbon electrodes X and Y'

Carbon electrode

Diagram 3

Based on Diagram 3, answer tlre following questions.

(u) (D What is meant by cation?

Carbon electrode X

0.001 mol dm-3

hydrochloric acid

ll nmkl

(ii) State all the ions present in hydrochloric acid solution.

(iiD

11 narkl

Which electrode is the anode and cathode.

Electrode X: '....'.'.'....'....

Electrode Y:12 marlcsl

Name the gas formed at electrode X.

11 narkl

Write the half equation for the reaction that takes place at electrodex.

(b) (D

(iD

ll markl


SULIT4541D

Electrolyte

Anode

Cathode13 narksl

Write the halfequation for the reaction that takes placeht cathode'

ll nukT

(c) The electrolvsis is repeated by replacing 0.001 mol dm-3 hydrochloric acid

solution witlr 1.0 moi dmr hydrochloric acid solution'

trtrr'hat will be observed at the electrodes?

Electrode X:

Electrode Y:12 narksl

One ofthe usage ofelectrolysis is electroplating' A student intends to

electroplate anlron spoon with silver to make it more attractive'

Suggest the suitable substances as the:

(d)

(e)

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SULIT 4541D

which contains the highest concentration of the

12 marksl

Table 4 shows the pH values of solutions V, W, X, Y and Z with a concentration

of 2.0 mol dm-3.

Solution w x Y Z

pH value I 4 7 l0 13

Table 4

Based on Table 4, answer the following questions.

(a) State one solution which has the following properties:

(i) Neutal:................

(ii) Alkaline:12 marksl

(b) Identifu the solutionfollowing ions:

(i) Hydrogen ion :

(ii) Hydroxide ion:

(.) Name an example of solution V.

U nark'l

Distilled water is added to 20.0 cm3 of solution Z to make 100-0 cm3 ofsolution.Calculate the new concentration ofsolution Z-

p narksJ

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(d)

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Diagram 4 shows the preparation ofsalt Q.

4541/2SULIT

(e)

Magnesiumcarbonate

.F.,",,;;l-.*F;l.m.EDiagram 4

Answer the following questions based on Diagram 4.

(i) Name salt Q.

ll mark)

State the solubility of salt Q.

, lt markl

Describe briefly how to prepare a solution of mlt Q from

magnesium carbonate.

13 marks]

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SULIT 4541D

Section B[20 rnarks]

Answer any one question from this section.

5. (a) Diagram 5.1 shows the electron arrangement of a molecule XY+. The

letters used do not represent the actual symbols ofthe elements'

Diagram 5.1

Based on Diagram 5.1, write the electron arrangement for atom ofelements X and Y.

. l2 marksl

(b) Table 5 shows the proton numbers ofelements P, Q, R and S.

Element Proton Number

P Ia -,

R 6s 8

Table 5

(D Arrange elements Q, R and S in ascending order of atomic size.

Explain your answer.14 narksl

(ii) The reaction between elements Q and S form a chemicalcomPound.Describe the formation ofthis compound'

16 narksl

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10

@@:


SULIT

SULIT

6.

l1 4s41D

(c) Diagram 52 shows 0rc r€actiol betni'een metal X and watcr' Metal X is

a Group 1 elemenl

Water

Diagrarr 52 -

Bi using three named aramples ofGroup I elcments' desoribean

"ip".i--*t to in

"stigarc the rcactivity ofGroup I elements with

water.inlour des"ription include a batanced chemical equation for one of the

thrce reactions involved.

lSnwksl

t2 4541n

Diagram 5.1 shox,s two containers ofchloride sah- The sahs can be preparcd

in the school laboratory.

(a)

Lchloride M chloride

Diagram 6.1

L chloride is soluble in water while M chloride is insoluble inwater-Suggest a name for L ohloride and M chloride

(D

Vntksl

(iD State suitabte chemicals for the PreParation for M ohloride indGXr).\lhfte a balanced chemical equation to r€present the reaotion'

\ [a narksl


SULIT 4541D

Diagram 6.2 shows the wastewater from a textild-iactory. The water isfound to be contaminated with hydrochloric aoid.

Diagrara 6.2

Describe an experiment to determine the concentration ofahydrochloric acid solution using titration method. A standard solution

of 0.1 mol dm-3 sodium hydroxide is provided.

In your description show t}e following aspeots:

. A list of materials and apparatuso Procedure of the experiment. A labeled didgram showing the apparatus set-upo Table of resulto All the calculation steps involved

[4 marks]

13

(b)

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For

SULIT

Section C[32 marks]

Answer all questions from this section'

Copper

After 30 minutes

-Diagam 7'l

State the observations that can be made from

min8es:

454112

i

this oxperiment after 30

7. Diagram 7.1 shows the set-up of apprltul-for. an ?xP€rlneT to determine the

p"tiriiJ al*"**e of an electroche#cal cell using zinc and copper as electrodas'

(a)

.:#.{:j-#=_-_-lrit_-_---_-_g----.---'-E*:---':-fi:--.-::-&----:---#--:_-----------_--------j

l-?W:-'=-!W::

:;w;=t%'-:--:-:-:::-::--1r--@::.:---------_----------:-.

ObservationDescription

Zinc elootode

Copper electrode

The copper(Il) zulPhate solution

l3 narks)

sulphatesolution


SULIT t5 4s4rD

The experiment is repeated by replacing copper with metals P and Q as

electrodes.'Diagram 7.2 shows the voltneter readings of all the experiments'

Zinc I Coppr MetalP I Zinc Zino / Metal Q

Reading: ........ Reading:Reading:

Diagram 7.2

(b) Record the voltmeter readings in the spaces provided in Diagram 7'2'

Il marksl

Construct a table to .""orA tt "

voltmeter reading for the different pairs

of metal.

13 narksl

Based-on the experiment, state the

(0 Manipulated variable :

(iD

(iiD

Responding variable :

Constant variable :

13 mula]

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(c)

(d)

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For


45411216SULIT

(e) State the operational definition for the potential difference in this

experiment.

13 narksl

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SULIT 454tD

8 shows two test tubes containing glaoial ethanoic acid in different

17

Diagramsolvents.

Glacialethanoic acidin water

Clacialethanoic acidin drypropanone

Diagram 8

Based on Diagram 8, plan a laboratory experiment to investigate the solvent thatis needed for glacial ethanoic acid to show its acidic properties.

Your planning should include the following aspects:

(a) Problem statement

(b) AII the variables

(c) Statement ofthe hypotlresis

(d) List of substances and apparatus

(e) Procedure for the experiment .

(0 Tabulation ofdata

|7 narksl

END OFQI]ESTIONPAPER

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Chemistry form 4