Mid Year 2012 Chem Paper 1

7/28/2019 Mid Year 2012 Chem Paper 1

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Name : ... Class : 4 Sc 1 / Sc 2

SULIT

SMK (P) METHODIST, PULAU PINANG

PEPERIKSAAN PERTENGAHAN TAHUN 2012

CHEMISTRY 4541

Form Five1 Hours 15 Minutes

JANGAN BUKA KERTAS SOALAN INI HINGGA DIBERITAHU

1. This question paper consists of 50 questions.

2. Answerall questions.

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

4. Blacken only one space for each question.

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 diagrams in the questions provided are not drawn to scale unless stated.

7. You may use a non-programmable scientific calculator.

Kertas soalan ini mengandungi ?? halaman bercetak


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Section A: Answerall questions. (100 marks)

1. A gas jar that contains air is placed on top of a gasjar of bromine. After a period of time, a uniformcolour is observed throughout both gas jars. What

process has happened?

A Condensation

B EvaporationC DiffusionD Sublimation

Diagram 1

2. Diagram 1 shows the symbol of an atom copper.

Protonnumber

Nucleonnumber

Number ofelectron

A 29 64 29

B 35 29 64

C 64 35 29

D 29 64 35

3. Which of the following atomic models wasproposed by Ernest Rutherford?

A The atom is the smallest particle.

B The atom is a positively charged sphere.C The atom contains a nucleus that is

surrounded by electrons moving a random.

D The atom contains a nucleus that issurrounded by electrons that move in certainorbitals.

4. From the position in the Periodic Table, we canpredict many properties of an element and itscompound. What property cannot be predicted?

A The formula of its oxide.B The number of isotopes it has.

C The melting point.D The freezing point.

5. Among the following compounds, which onecontains particles bonded by strong electrostaticforces?

A AmmoniaB Naphthalene

C Carbon monoxideD Sodium chloride

6. Which of the following has the same empiricalformula as ethene, C2H4?

A C3H7B C4H11

C C5H11D C6H12

7. The molar mass of astatine is 210 gmol-1

. What is

the relative atomic mass for astatine?

A 100

B 110C 210D 120

8. Which of the following conducts electricity butdoes not undergo chemical changes?

A Molten lead(II) chlorideB Molten sulphur

C Molten magnesiumD Molten aluminium nitrate

9. Diagram 2 shows the set up of apparatus for theelectrolysis of copper(II) sulphate solution.

Diagram 2

Which of the following solutions can be used to

replace copper(II) sulphate solution?

A Ethyl ethanoate

B Potassium bromide solutionC HexaneD Hexene


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10.Diagram 3 shows the set-up of apparatus forelectrolysis.

Diagram 3

What is test would you use to confirm theproduct formed in test tube Y after electrolysis

has been carried out for some time?

A A lighted wooden splinterB Lime waterC A glowing splinterD A moist litmus paper

11.Which of the following is NOT TRUE about theproperties of acid?

A Undergoes neutralisation with alkali.B Has a pH value lower than 7.

C Reacts with ammonium salt and heated toproduce ammonia gas.

D Reacts with metal carbonates to producehydrogen.

12.Latex can be kept in liquid state so that it can betransported to factories by adding

A ethanoic acidB hydrochloric acid

C ammonium hydroxideD ammonium sulphate

13.Which noble gas given below is used to fillairships and weather balloons?

A Argon

B NeonC HeliumD Xenon

14.Which of the following shows the arrangement ofatoms in an alloy?

15.Diagram 4 shows a graph of a volume of gasagainst time. The rate of reaction is the highest

at

Diagram 4


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16.Diagram 5 below shows the formation ofammonia through Haber process.

Diagram 5

Which of the following represent catalyst A,temperature B and pressure C?

Catalyst Temperature

B,oC

Pressure

C, atm

A Iron 450 200

B Platinum 450 100

C Iron 200 450

D Vanadium(V)oxide

550 200

17.A reaction between sodium thiosulphate solutionand dilute sulphuric acid will produce sulphur.

Which of the following graphs shows therelationship between the concentration of sodium

thiosulphate solution and the time taken to formsulphur?

18.Calculate the volume of sodium hydroxide ofconcentration 0.5 mol dm-3 needed to neutralise

25.0 cm3 sulphuric acid of concentration0.20 mol dm-3.

A 10 cm3

B 20 cm3C 25 cm3

D 50 cm3

19.The distilled water is added to 20 cm3 of 1.0 mol dm

sodium hydroxide solution to produce 250 cm3 ofsodium hydroxide solution. What is the concentration

of the sodium hydroxide solution produced?

A 0.08 mol dm-3

B 0.04 mol dm-3C 0.06 mol dm-3

D 0.02 mol dm-3

20.Which of the following solutions has the highestconcentration of hydrogen ion?

A 50 cm3 of 1.0 mol dm-3 H2SO4 solutionB 150 cm

3of 1.0 mol dm

-3H2SO4 solution

C 100 cm3

of 1.0 mol dm-3

H2SO4 solution

D 50 cm3 of 2.0 mol dm-3 H2SO4 solution

21.An element M has proton number 12. It has thetendency of forming cation M2+. What is the

electron arrangement of M2+

?A 2.8.2B 2.2

C 2.8D 2.8.8.2


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22.Which of the following substances hasINCORRECT chemical formulae?

Substance Formula

A Sodium chloride NaCl

B Copper(II) sulphate CuSO4

C Potassium oxide K2O

D Ammonium nitrate NH4(NO3)2

23.What is the number of oxygen atom in 0.1 moleof water?[Avogadro constant: 6.02 x 1023 mol-1]

A 6.02 x 1022

B 6.02 x 1023C 60.2 x 1023

D 3.01 x 1023

24.Going down Group 18 of the Periodic Table of

Element,

I the boiling point of the elements increases..II the size of the atom increases.III the forces of attraction between the particles

increases.IV the solubility of the elements in water

increases.

A I and II only

B II and III onlyC III and IV onlyD I, II and III only

25.The table above shows some information onaluminium oxide. From the in-formation above,which of the following is TRUE?

A Aluminium oxide is a base oxide.B Aluminium oxide is an acid oxide.C Aluminium oxide is an amphoteric oxide.D Aluminium oxide is a metalloid oxide.

26.The diagram 6 below shows the electronarrangement of atoms P, Q and R.

Diagram 6

R can react with P and Q to form two differentcompounds. What are the formulae of thecompounds formed?

P and R Q and RA P2R QR2B P2R QRC PR QR2D PR2 QR2

27.When an electric current is flowed throughmolten lead(II) bromide, brown vapour can beseen on the anode of the carbon electrode. What

is the reason?

A Potassium is formed at the anode.B Potassium reacts with bromine at the carbon

anode.

C Bromide ion loses electron at the carbonanode to produce bromine.

D Potassium bromide dissociates intopotassium ions and bromide ions.

28.Both ethanoic acid and nitric acid ofconcentration 1 mol dm-3have

I the same concentration of hydrogen ionsII different degree of ionisation in waterIII different pH valueIV the same concentration of hydroxide ions

A I and II onlyB II and III onlyC III and IV onlyD I and IV only

Aluminium oxide reacts with hydrochloricacid

Aluminium oxide reacts with sodiumhyroxide solution


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29.A student added solution P to solution Q. He thenfilter the mixture and obtained salt R as residue

and solution S as filtrate. Which of the followingequations correctly represent the preparation of

salt R?

A HCl + NaOHNaCl + H2O

B CuCl2 + Na2SO4CuSO4 + 2NaClC MgCl2 + Na2CO3MgCO3 + 2NaCl

D CuSO4 + 2KNO3Cu(NO3)2 + K2SO4

30.Which of the following is the meaning ofactivation energy?

A The maximum energy that the particles needto produce effective collision

B The minimum amount of energy thatparticles must have in order to react

C The amount of energy used by the particlesduring a collision

D The amount of kinetic energy of molecules

during a collision

31.Study the structural formula below in diagram 7.

Diagram 7

Based on the IUPAC system, what is the name of

the compound having this structural formula?

A 2,4,4- trimethylpentaneB 2,4,4- trimethyloctaneC 2-ethyl-4-methylpentane

D 2,4-dimethylhexane

32. Which of the following pairs of substances arenot isomers?

A Hexane and 2,3-dimethyl pentane

B 1-butene and 2-methylpropeneC Pentane and 2,2-dimethylpropaneD 2-chloropentane and 3-chloropentane

33. A catalyst

A always slows down a chemical reactionB is not used up in the chemical reaction

C can catalyst many chemical reactionsD always doubles the rate of a chemical

reaction

34. Unsaturated fats can be converted to saturatedfats through

A hydrogenationB esterificationC neutralization

D fermentation

35.W, X, Y and Z are four metals. Consider thereactions below involving these metals:

Z sulphate + X Z + X sulphateZ sulphate + W No reactionY sulphate + W Y + W sulphate

Arrange the metals W, X, Y and Z in decreasing

order of reactivity.

A X, W, Z, Y

B Y, W, Z, XC X, Z, W, YD Y, Z, W, X

36.The number of valence electrons in an atom of anelement will determine ..

I the stability of the atom.II the chemical properties of the element.

III the group number of the element in the

Periodic Table.IV the melting point and boiling point of the

element.

A I and II onlyB I and III onlyC I, II and III only

D I, II, III and IV


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37.The chemical formula for glucose is C6H12O6.This shows that ...

I the empirical formula for glucose is CH2O.

II each glucose molecule is made up of 6carbon atoms, 12 hydrogen atoms and 6oxygen atoms.

III 1 mol of glucose contains a total of144.48 x 1023 atoms.

IV one glucose molecule has a mass of 180times higher than the mass of 1 hydrogenatom

(Use the information relative atomic mass for

H =1, C =12 and O =16Avogadro Constant = 6.02 X 1023 mol-1 )

A I and II onlyB I, III and IV onlyC II, III and IV onlyD I, II, III and IV

38.

Which of the following conclusions can be drawnfrom the above statement?

I 1 mol of L has 8 times more atoms than 1

mol of K

II 1 atom of L is 8 times heavier than 1 atom ofK

III 1 atom of L has the same number of protonswith 8 atoms of K

IV 56 g of L has the same number of atoms as in7 g of K

A I and III onlyB II and IV onlyC I, II and III onlyD I, II, III and IV

39. Diagram 8 shows set up apparatus for titrationof potassium hydroxide with sulphuric acid.

Diagram 8What is total volume of the mixed solution in theconical flask at the end point of titration in

diagram 8?

A 30 cm3B 20 cm3C 10 cm3

D 40 cm3

40. Table 9 shows the total volume of carbondioxide gas collected at various time interval ina reaction of calcium carbonate withhydrochloric acid.

Time/ s 0 30 60 90

Volume of gas/ cm3 0.00 4.20 7.70 10.90

Time/ s 120 150 180 210

Volume of gas/ cm3 13.70 15.20 16.00 16.00

Table 9

What is the average rate of reaction in the thirdminute?

A 0.128 cm3 s 1

B 0.100 cm3 s 1

C 0.114 cm3

s1

D 0.088 cm3 s 1

The relative atomic mass of metal K is 7

and the relative atomic mass of the metal

L is 56.


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41. An alloy is harder than its pure metal becausethe foreign atoms in the alloy

A increases the bond strength between the

atoms.B increases the empty spaces between the

atoms.

C reacts with the pure metal atoms to form acompound.

D reduces the ability of the atoms to slideacross each other.

42. An esterification reaction is given as follows :

What is the molecular formula of ester Q?

A C3H7COOC2H5B C2H5COOC3H7

C C2H5COOC2H5D C5H11COOH

43.

Positive

terminal

Negative

terminal

Reading of the

voltmeter/V

Lead Magnesium 1.05

Zinc Magnesium 0.42

Tin Zinc 0.51

Table 10

Table 10 shows the reading of a voltmeter for eachpair of metals which are immersed in a electrolytethat are connected with one salt bridge to form a

simple voltaic cell. From the results, what is thereading of the voltmeter of a voltaic cell that consistsof a pair of lead and tin metals?

A 0.12 V

B 0.63 VC 0.93 VD 1.98 V

44. An iron spoon is electroplated. The apparatusused is shown in diagram 11.

Diagram 11

At the end of the electrolysis, it is observed that...

Anode Cathode

A Brown deposits form Gas bubbles arereleased

B Copper rod becomesthinner

Brown deposits form

C Brown deposits form Copper rod becomesthicker

D Gas bubbles arereleased

Copper rod becomesthinner

45.The reaction between lead(II) nitrate andpotassium iodide solution is represented by theequation below :

Pb(NO3)2(aq) + 2KI (aq) PbI2 (s) + 2KNO3 (aq)

25.0 cm3 of 1.0 mol dm-3 potassium iodidesolution is mixed with 25.0 cm3 of 1.0 mol dm-3

lead(II) nitrate solution. What is the maximummass of lead(II) iodide produced in this reaction?

(Use the information relative atomic mass forI = 127 and Pb = 207)

A 4.175 gB 5.76 g

C 8.35 gD 11.52 g

46.

Propanoic acid + ethanolQ + H2O


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Diagram 12

Consider the conversion in Diagram 12 andidentify the substance Z.

A 1-butanolB 2-methylpropanol

C Butanoic acidD 2-methyl-2-butanol

47.Ceramic is made fromA Silica, SiO2

B CementC MarmarD Aluminosilicate hydrate

48.The following statements are about atom U and T.

Electron arrangement of atom U is 1

Proton number of atom T is 6

What is the formula of the compound formedbetween U and T?

A TUB TU2C TU3

D TU4

49.Diagram 13 shows the electron arrangement of acompound formed between element T and

element Q.

Diagram 13What group in the Periodic Table of Elements is

element Q located?

A 2

B 8C 16D 18

50.Assuming that a new element called Sharine(symbol Sh) was discovered and it is abovefluorine in Group 17 of the Periodic Table ofElement, which are the CORRECT statementsabout Sharine?

I It is a non-metal.II It is the most reactive element in Group 17.III It is the most electronegative element in the

Group 17.IV It is the most probably in gaseous form at

room conditions.

A I and II onlyB II and III onlyC I, II and III onlyD I, II, III and IV

END OF QUESTION PAPER

Prepared by, Checked by, Approved by:

________________ __________________ ________________

(Cik Tan Phei Ling) (Cik Tan Suan See) (Pn. Tan Kim Chen)

Mid Year 2012 Chem Paper 1

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