chem paper 1

8/2/2019 Chem Paper 1

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1 The proton number of X is 17. Which is the correct electron arrangement of X?A 2.9B 2.8.6C 2.8.7D 2.8.8.1

2 Which of the following shows the correct type of particle for each substance?

Atom Molecule Ion

A Potassium Water Carbon dioxideB Sodium Bromine Sodium ChlorideC Water Aluminium SodiumD Carbon dioxide Suphur dioxide Magnesium oxide

3 Diagram 1 shows a model of an atom.

Diagram 1

Who proposed the atomic model?

A John DaltonB Sir J.J ThomsonC James Chadwick D Ernest Rutherford

4 The following information is regarding the subatomic particles of atomP.

Which of the following diagrams represents the atomP?

1

Number of neutrons is 14The nucleon number is 27


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A C

B D

5 The relative molecular mass of a metal nitrate, X(NO3)2 is 189. Find the relative atomic mass of the metalX. [Relative atomic mass: N, 14; O, 16]

A 129B 79C 127D 65

6 Which compound has the correct formula?Compound Formula

A Calcium chloride Ca2ClB Lead(II) oxide PbO2C Copper(II) oxide Cu2OD Iron(III) chloride FeCl3

7 Sodium reacts with chlorine to form sodium chloride.

2Na + Cl2 2NaCl

What is the mass of sodium chloride formed when 4.60g of sodium reacts with excess chlorine? [Relativeatomic mass: Na, 23; Cl, 35.5]

A 2.93gB 3.25gC 5.85gD 11.70g

2


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8 The following equation shows the heating reaction of calcium carbonate.

CaCO3CaO + CO2

Which of the following is true when 1 mol of calcium carbonate is decomposed? [Relative atomic mass: C,12; O, 16; Ca, 40; Molar volume: 24 dm3 mol -1 at room temperature and pressure]

A 3 mol of carbon dioxide is releasedB 56g of calcium oxide is formedC 3 molecules of carbon dioxide is releasedD 72 dm3 of carbon dioxide is released

9 The following equation shows the combustion reaction of propane.

C3H8(g) + 5O2(g) 3CO2(g) + 4H20(l)The following statements are true when 1 mol of propane burns completely in the airexcept[Relative atomic mass: C, 12; O,16; H,1; 1 mol of gas occupied the volume of 24dm3 at room temperatureand pressure]

A 4 molecules of water is formedB 3 mol of carbon dioxide gas is given off

C 72 dm

3

of carbon dioxide gas is given offD 72g of water is formed

10 The relative molecular mass of CaCO3 is 100. Which of the following has the same relative molecular massas CaCO3? [Relative atomic mass: C, 12; O, 16; Mg, 24; Al, 27; Si, 28; S, 32; K, 39; Ca, 40]

A CaSO3B Al2O3C MgSiO3D K2 CO3

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Table 1Table 1 shows the electron arrangement in four different elements,P, Q, Rand S.Which of the following elements are in Period 3 of the Periodic Table of Elements?A P and QB Q and R C P and R D R and S

12 An inert gas does not react with other elements under normal conditions. Which of the following bestexplains this fact?

A The outer shell of its atomic structure is filled with the maximum number of electrons

B An inert gas exists as a mono atomic gasC Inert gases are classified in the Group 18 of the periodic TableD Noble gases are low reactivity

13 A new metal, L was discovered and it belongs to Group 1. Which of the following chemical equation iscorrect on the reaction of L?

A L + Br 2 LBr2B 2L + H20 2LOH + H2

C L + Cl2 LCl

D 4L + O2 2LO

3

P : 2.8.3Q : 2.8.8.1R : 2.8.7S : 2.8


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14 Which of the following statements is the opinion of Henry J.G. Moseley?A Elements can be classified into groups of threeB Elements should be arranged by proton number and not by atomic massC Elements should be grouped according to metals, non-metals and semi metalsD Elements can be placed in order of their atomic mass

15 Which substance is a covalent compound?A Sodium chloride

B Zinc nitrateC Hydrogen chlorideD Magnesium chloride

16 X reacts with four chlorine atoms to form a substance with the electron shown in Diagram 2.

Diagram 2

The electron arrangement of atom X isA 2.4B 2.8C 2.4.4D 2.8.7

17 The electronic arrangement of atom X is 2.8.8.1 and the electronic configuration of atom Y is 2.6. ElementsX and Y react to form a compound. Which of the following is true about the reaction?

A Atom Y donates 2 electrons

B Atom X receives 1 electronC An ionic compound is formedD The compound formed has the formula XY

18 Diagram 3 shows the positions of elements Q, R, T, W and X in the Periodic Table.

Diagram 3

Which of the following pairs of elements combine to form an ionic compound?

A Q and TB R and TC R and XD W and X

19 Cryolite is added to aluminium oxide in the extraction of aluminium from its ore. What is the function ofcryolite?

4

QR T

W X


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A To increase the temperature of the mixtureB To increase the rate of electrolysisC To reduce the rate of oxidation at the anodeD To reduce the melting point of aluminium oxide

20 A molten substance, P, produces the following results when electrolysed.

Electrode ObservationAnode Brown vapour Cathode Brown solid

Which of the following is substance P?A Lead (II) chlorideB Zinc bromideC Sodium chlorideD Copper (II) bromide

21 Diagram 4 shows the electrolysis of copper (II) nitrate solution.

Diagram 4

Which of the half equation represents the reaction at the cathode?

A Cu2+(aq) + 2e- Cu(s)

B Cu(s) Cu2+(aq) + 2e-

C 4OH(aq) O2(g) + 2H2O (l) + 4e-

D 2H+(aq) + 2e- H2(g)

22 Diagram 5 shows the apparatus set up of a chemical cell.

Diagram 5

What substance, when used as P and Q, will obtain the highest potential?

5


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P Q

A Zinc Zinc nitrate

B Magnesium Magnesium nitrateC Iron Iron (II) sulphateD Aluminium Molten aluminium

23 Copper can be purified through electrolysis by

A using copper (II) sulphate solution as the electrolyteB passing electricity for 5 minutes onlyC using impure copper as the cathodeD using pure copper as the anode

24 Which of the following equation represent the neutralisation reaction?

A ZnO + H2O Zn (OH)2B Zn + 2HCl ZnCl2 + H2C ZnO + 2HCl ZnCl2 + H2O

D ZnO + 2NaOH + H2O Na2ZnO(OH)4

25 The following equation shows the reaction between zinc oxide and sulphuric acid.

5.0g of zinc oxide is added to 50.0 cm3 of 1.0 mol dm3 sulphuric acid. What is the mass of zinc oxide left atthe end of the reaction?[Relative atomic mass: H, 1; Zn, 65; O, 16; S, 32]

A 0.41 gB 0.50 gC 0.81 gD 0.95 g

26 Which of the following solutions has the lowest concentration of OH ions?

Substance pH value

A P 13B Q 7C R 1D S 3

27 An acid X has pH 6. Which statement is true about acid X?A Ionises partially in water B Is slightly soluble in water C Reacts only with strong alkalisD Has high concentration of hydrogen ions

28 Which of the following salts is insoluble in water?A Ammonium carbonateB Lead (II) nitrateC Zinc sulphateD Lead (II) iodide

29 Compound X is heated slowly and then heated strongly. The residue formed is brown when hot but yellowwhen cooled. It also produces a brown gas. What is compound X?

6

ZnO + H2SO4 ZnSO4 + H2O


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A Zinc nitrateB Lead (II) carbonateC Ammonium nitrateD Lead (II) nitrate

30Test ObservationI Sodium chloride solution is added to the

solution

White precipitate is formed

II Sodium hydroxide solution is added untilexcess to the solution

White precipitate soluble in excess sodiumhydroxide solution

III Potassium iodide solution is added to thesolution

Yellow precipitate is formed

Table 2

Table 2 shows some tests being carried out on a solution containing cation X. Based on the results in Table1, what is cation X?

A Ag+

B Pb2+

C Zn2+

D Al3+

31 Diagram 6 shows the stages in the manufacturing of sulphuric acid in the Contact process.

Diagram 6What is done in Stage X?A Heated stronglyB Dissolved in waterC Compressed under high pressureD Dissolved in concentrated sulphuric acid

32 Diagram 7 shows the arrangement of atoms in P and Q.

P Q

Diagram 7

Which of the following are probably P and Q?

P QA Copper BronzeB Sodium Sodium chlorideC Bronze Copper D Zinc Glass

33 Which of the following explains the meaning of effective collisions?A The collisions where the particles have low kinetic energy

7

X

Sulphur Sulphur dioxide Sulphur trioxide Oleum Sulphuric acid


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B The collisions that causes a reactionC The collisions which are effective and take place before reactionD The collisions where the particles collide infrequently and results in low activation energy

34 Which of the following statement is true about a catalyst?A It results in more products to be collectedB It changes the rate of reaction by altering the activation energy of the reactionC A huge amount of catalyst is needed for a reaction to occur

D The mass of the catalyst decreases at the end of the reaction

35 The table shows the volume of hydrogen gas collected when zinc is reacted with hydrochloric acid.

Time/s Volume of gas/cm3

0 015 2230 3845 4560 4875 48

What is the average rate of the reaction?

A 0.37 cm3 s-1

B 0.64 cm3 s-1

C 0.80 cm3 s-1

D 1.47 cm3 s-1

36 A student conducted two separate experiments using excess zinc granules and hydrochloric acid. Table 3shows the information of the two experiments.

Experiment Chemicals

I Excess zinc granules and 25 cm3 of 0.1 mol dm -3 hydrochloricacid

II Excess zinc granules and 25 cm

3

of 0.1 mol dm

-3

hydrochloricacid + 10 cm3 distilled water

Table 3

Which of the following graphs show the results for both experiments?

A C

8

Volume of gas / cm3

Time /s

I

II

Volume of gas / cm3

Time /s

I

II


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B D

37 Diagram 8 shows the set up of the apparatus for the reaction between sodium thiosulphate solution andhydrochloric acid to form a yellow precipitate.

Diagram 8

The time taken for the X mark to disappear from sight is recorded. Which of the following graphs showthe relationship between the temperature of sodium thiosulphate solution and the time taken.

A C

9

Volume of gas / cm3

Time /s

I

II

Volume of gas / cm3

Time /s

II

I

Temperature / C

Time /s

Temperature / C

Time /s


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B D

38 Which of the following is the molecular formula of a saturated hydrocarbon?A CH2CHCH2CHCl2B CH3CH2CH2CH2CH3C CH2CHCH2CH2CH3D CH3CH2CH2COOCH2CH3

39 Diagram 9 shows the structural formula of a hydrocarbon.

Diagram 9

What is the IUPAC name of the hydrocarbon?A 2,3-dimethylpentaneB 1,1,2-trimethylbutaneC 3,4-dimethylpentaneD 2-methyl-3-ethylbutane

40 Diagram 10 is a flow chart which shows the conversion of propene to propanoic acid and to propane.

Diagram 10

What is represented by reaction 1, 2 and 3 in the flow chart?

10

Temperature / C

Time /s

Time /s

Temperature / C

Propane Propene Propanol

Propanoic acid

1 2

3


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1 2 3

A Hydrogenation Hydration OxidationB Hydrogenation Oxidation DehydrationC Oxidation Hydration DehydrationD Hydration Hydrogenation Oxidation

41 The flow chart below shows the process of producing 1 bromo-propene when propene gas reacts with

hydrogen bromide gas.

A OxidationB AdditionC SubstitutionD Hydrogenation

42 A student has an iron necklace. She wants to make the necklace more beautiful and durable. What is thebest way to do this?

A Wash the necklace with soapB Plate the necklace with gold dustC Soak the necklace in dilute hydrochloric acid for several minutesD Scrub the necklace with sandpaper

43 Which of the following is an oxidation process?A A chlorine molecule gains hydrogenB A potassium atom loses an electronC A carbon dioxide molecule loses oxygenD A fluorine atom gains an electron

44 With reference to the half equation given below,

What are the values ofx, y andz?

45 Which of the following is a redox reaction?A C + O2 CO2B Ca(NO3)2 + 2NaCl CaCl2 + 2NaNO3C CuSO4 + K2CO3 CuCO3 + K2SO4D HCl + KOH KCl + H2O

46 Which of the following substances consist of ions?A Magnesium

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x y z

A 2 3 4B 3 3 4C 4 3 2

D 4 3 4

CH2=CH2CH3 + HBr CH2 BrCH2CH3

MnO4 + xH+ + ye- MnO2 + zH2O


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B Nitrogen gasC Lead (II) iodideD Naphthalene

47 Which of the following is an endothermic reaction?

A 2Mg (s) + O2 (g) 2MgO (g)

B H+ (aq) + OH(aq ) H2O (l)

C CaCO3 (s) CaO (s) + CO2 (g)D Zn (s) + Cu2+ (aq ) Zn2+ (aq) + Cu (s)

48 Which of the following reactions produce a salt and hydrogen gas?

A Calcium carbonate and hydrochloric acid.B Copper(II) oxide and nitric acid.C Zinc and hydrochloric acid.D Sodium hydroxide and sulphuric acid.

49 Which of the following salts can be prepared by reacting a metal with a dilute hydrochloric acid?

A Zinc chloride.B Copper(II) chlorideC Lead(II) chloride.D Silver chloride.

50 Which of the following salts is prepared by the titration method?A Copper(II) sulphateB Zinc chlorideC Potassium nitrateD Magnesium chloride

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chem paper 1

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