Csec Chemistry June 2014 P1.pdf

TESTCODE

FORM TP 2014054

01212010

MAY/JUNE 2014

CARIBBEAN EXAMINATIONS

COUNCIL

CARIBBEAN SECONDARY EDUCATION CERTIFICATE® EXAMINATION CHEMISTRY Paper 01 - General Proficiency

1 hour 15 minutes ( 06 JUNE 2014 (p.m.))

READ THE FOLLOWING INSTRUCTIONS CAREFULLY. 1.

This test consists of 60 items. You will have 1 hour and 15 minutes to answer them.

2.

In addition to this test booklet, you should have an answer sheet.

3.

Each item in this test has four suggested answers lettered (A), (B), (C), (D). Read each item you are about to answer and decide which choice is best.

4.

On your answer sheet, find the number which corresponds to your item and shade the space having the same letter as the answer you have chosen. Look at the sample item below. Sample Item . The SI unit of length is the

(A) (B) (C) (D)

Sample Answer

e®©®

metre newton second kilogram

The best answer to this item is "metre", so answer space (A) has been shaded. 5.

If you want to change your answer, erase it completely before you fill in your new choice.

6. When you are told to begin, turn the page and work as quickly and as carefully as you can. If you cannot answer an item, go on to the next one. You may return to this item later. Your score will be the total number of correct answers. 7. You may do any rough work in this booklet. 8. Figures are not necessarily drawn to scale.

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9. You may use a silent, non-programmable calculator to answer items.

DO NOT TURN TIDS PAGE UNTIL YOU ARE TOLD TO DO SO. Copyright © 2012 Caribbean Examinations Council All rights reserved.

-21.

Which ofthe following movements depicts Brownian motion? (A) (B)

(C) (D)

2.

Pollen grains moving at random in water Water nioving from sea water into brine through cellophane The scent of perfume moving through the air in a room The movement of sugar particles into the blood stream through the intestine wall

4.

(A) (B) (C) (D)

5.

(A)

(B) (C) (D)

y

(D) 6.

Nonmetal Nonmetal Metal Metal

Item 3 refers to the following graph which shows the changes in temperature with time, for a suqstance that is heated until no further physical change takes place.

In the equation

the values ofx andy respectively are (A) (B) (C) (D) 7.

8. During which portion of the curve is the substance a liquid only?

Hydrogen Oxygen Nitrogen Chlorine

xKOH + 3Br2 ~yKBr+ KBr0 3 +3H 20,

Temp~rature

3.

neutrons protons and electrons neutrons and protons protons, neutrons and electrons

Which of the following elements has 7 electrons in its outer shell? (A) (B) (C)

The arrangements of electrons in atoms of X andY are 2, 8, 5 and 2, 8, 6 respectively. Which of the following options represents X andY?

X Metal Nonmetal Nonmetal Metal

The mass number of an element is the number of particles in the nucleus of an atom ofthat element. 'Particles' refer to

5; y = 6 6; y = 5 x=5;y=5 x = 6; y = 6 X=

X=

. Of the following ions, the one which requires the LARGEST number of moles of electrons to liberate one mole of it is (A) (B) (C)

AP+ ClCu2 +

(D)

0 2-

The quantity '1 mole of atoms of an element', refers to the mass of (A) (B)

(A)

I

(C)

(B) (C)

II III

(D)

(D)

IV

1 atom of the element the element which contains 6.0 x 1023 atoms the element which occupies 24.0 dm3 at STP the element which combines completely with 12 g of carbon -12

GO ON TO THE NEXT PAGE

,.,

- -' 9.

Which of the following substances does NOT have a giant structure? (A) (B) (C) (D)

10.

(B) (C) (D)

11.

anions are held together by negative electrons metal atoms are held together by molecular forces cations are held together by a sea of mobile electrons positive metal ions are held together by a sea of anions

15.

(D)

16.

(B)

(C)

(D)

17.

13.

0.0015 g

(B) ,

(C)

0.15 g ·1.s.g

(D)

15.0 g

Separation of mixtures is based on specific properties of the components in the mixture. Which of the following properties is used to separate a mixture of oil and water? (A) (B)

(C) (D)

Solubility Viscosity Particle size Boiling point

loose electrons which can move throughout the lattice weak attraction among the hexagonal layers of carbon atoms strong attraction among the hexagonal layers of carbon atoms ·strong attraction within the hexagonal layers of carbon atoms

Which of the following halogens is a liquid at room temperature? (A)

(B) (C) (D)

18.

gas evolved rate of reaction colour of the product colour change with litmus

Graphite can be used as a lubricant because of the (A)

The mass concentratibn of a potassium chloride solution is 60 g dm-3 . What is the mass of potassium chloride in 25 cm3 of this solution?

Filtration Precipitation Centrifugation Chromatography

Barium is below calcium in Group II of the Periodic Table. When these metals react with water, the main differences in observation is the

(A) (B) (C)

Gels Foams Emulsions Suspensions

(A)

'Which of the following separation techniques is NOT used during the ' extraction of sucrose from sugar cane? (A) (B) (C) (D)

From which of the following substances can a solid be obtained by the process of sedimentation? (A) (B) (C) (D)

12.

14.

Copper Graphite Oxygen Sodium chloride

Which of the following statements BEST describes the formation of a metallic bond? A metallic bond is formed when (A)

-

Bromine Fluorine Chlorine Iodine

Which of the following terms BEST describes strong acids? (A)

(B)

(C)

(D)

Concentrated Partially ionized Ionized to a large extent Concentrated and partially ionized

GO ON TO THE NEXT PAGE

-419.

A solution has a pH of 1. This solution would be expected to react with (A) (B) (C)

(D)

23.

zinc metal to produce hydrogen zinc metal to produce a solution of pH 10 hydrochloric acid to produce chlorine hydrochloric acid to produce a salt and water

(A) (B) (C) (D)

24.

Item 20 refers to one mole ofEACH of the following acids. I. II. III.

In the electrolysis of aqueous copper(II) sulfate solution using copper electrodes, the anode

The equation for the reaction of silicon with chlorine is Si(s) + 2Cl/g)

Which of the above acids would require MORE than one mole of NaOH(aq) for complete neutralization?

(B) (C)

(A) (B) (C) (D)

II only I and III only II and III only I, II and III

(D)

25.

21.

Which of the following terms BEST describes the oxide of a metal? (A) (B) (C) (D) ,

Sa,lt Base Alkali Acid

(A) (B)

Asolution, when reacted with the gas sulfur dioxide, becomes green. The solution contains potassium (A) (B) (C) (D)

SiCl/1).

oxidized with an increase 111 oxidation state oxidized with a decrease 111 oxidation state reduced with an increase 111 oxidation state reduced with a decrease in oxidation state

Which of the statements below is true for the following equation?

(C)

22.

~

In this reaction, silicon is the reducing agent and is

H 2S04 CH3 COOH (COOH) 2

(A) 20.

decreases in mass . . mcreases m mass undergoes no change in mass is the site where reduction occurs

Mg is reduced from oxidation state +2 to 0. Mg is oxidized from oxidation state 0 to +2. Hydrogen is reduced from oxidation

state -t-2 to 0. (D)

Hydrogen is oxidized from oxidation state 0 to + 1.

nitrate sulfate dichromate(VI) manganate(VII)

GO ON TO THE NEXT PAGE

·

-526.

2.32 g pf an oxide of iron were heated in dry l,tydrogen. When the reaction was completed, 1.68 g of iron were formed.

31.

Which of the following statements about electrolysis is NOT correct? (A)

[RAM: Fe= 56; 0 = 16] (B)

The oxide of iron was (A) (B) (C) (D)

27.

(D)

Acidified potassium manganate(VII) is (A) (B) (C) (D)

28.

(C)

reduced oxidized neutralized decomposed

The electrons leave the solution via the positive electrode. The electrons enter the solution via the negative electrode. Decomposition of the electrolyte at the electrode produces an electric current. Decomposition of the electrolyte at the electrode is due to an electric current.

a reducing agent an oxidizing agent a dehydrating agent both an oxidizing agent and reducing agent

During the electrolysis ofaqueous copper(II) sulfate solution using inert electrodes, the ions migrating to the cathode are (A)

32.

(A) (B) (C) (D) 33.

H+(aq) and OH-(aq)

(C)

S04 2-(aq) and OH-(aq)

(D)

Cu + (aq) and H+ (aq)

The rate of a chemical reaction does NOT depend on the (A) (B) (C)

(D)

presence of a catalyst concentration of the reactants energy change of the overall rt
2

34.

Items 29"":"30 refer to the following options. Each option may be used once, more than once or not at all to answer the items below.

(C) (D)

100 600 1 000 60 000

Cu2+ (aq) and SO/-(aq)

(B)

(A) (B)

How many coulombs (C) of electricity pass through an electrolyte when a cmTent of 100 A flows for 10 minutes?

At a flour mill, there is the risk of an explosive reaction occurring when a match is struck. This is due MAINLY to the (A)

(B) (C)

Iron Lead Copper Magnesium

(D)

increased pressure in the area increased concentration of flour high temperature caused by the lighted match large surface area created by the large number of small particles

Which element 29.

30.

forms an oxide which cannot be reduced by hydrogen?

would be liberated from an aqueous solution of its salts during electrolysis?

35.

Which of the following metals can be extracted by electrolysis? (A)

Zn

(B)

Ca

(C) (D)

Al Fe ~r\

f\1\.T T r \ 'T'TTn

~TT:'""'{T'T' -nA

I"'T"'

- 636.

When crystals of potassium nitrate are dis-s olved in water, the temperature of the solution decreases because (A)

(B)

(C) (D)

37.

Which of the following pairs of substances is MOST suitable for producing carbon ' dioxide? (A)

energy is required to break down the crystal structure of the potassium nitrate heat is always absorbed when a substance dissolves the water absorbs the energy from the potassium nitrate the energy content of dissolved potassium nitrate is lower than that of solid potassium nitrate

(B)

(C) (D)

Dilute hydrochloric acid and calcium carbonate Dilute hydrochloric acid and calcium hydroxide Sodium hydroxide and calcium carbonate Dilute sulfuric acid and calcium hydroxide

Items 38-39 refer to the following sequence of reactions involving iron compounds, where l, II, III and IV represent progressive stages in the sequence.

38.

In which stage is the oxidation state of iron

increased?

A suitable reagent that could be used at IV is

I

(A)

(B)

II

(B)

(C) (D)

III IV

(C) (D)

(A)

40.

39.

steam hydrogen solid copper oxide aqueous sodium hydroxide

Wiii~h .ofthe following metals can displace zinc from a solution of zinc sulfate? (A)

(B) (C) (D)

· Iron Lead Copper Aluminium

IC_I\

1\1\.T Tl\ Tl-lh'

1'-Th'YT P .t\ GF

-7Items 41-42 refer to the properties of four metals, W, X, Y and Z, which are summarised in the following table.

Reaction With Water/Steam

Metal

41.

w

There is no reaction.

X

Reacts with steam but not with cold water. Oxide, N0 2 and 0 2

y

Reacts rapidly with cold water.

Nitrite and oxygen

z

Reacts slowly with cold water.

Oxide, N0 2 and 0 2

The order of reactivity of these metals, with the MOST reactive FIRST, is (A) (B) (C)

(D) 43.

(D)

45.

Metal, N0 2 and 0 2

42.

W,X,Y,Z X,Y, Z,W Y,Z, W,X Y,Z,X,W

Which of the following substances forms dense white fumes with ammonia gas? (A) (B) (C)

44.

Products Formed When Nitrate is Heated

Oxygen Hydrogen Nitrogen dioxide Hydrogen chloride

Which of the following observations is likely when EXCESS aqueous ammonia is added to a solution of copper(II) sulfate and the mixture is shaken? (A) (B)

Green soiution Green precipitate

(C)

D,eep blue solution

(D)

Light blue precipitate

Which of these metals forms a carbonate which is stable to heat?

w

(A) (B) (C)

X

(D)

z

y

Item 46 refers to the following equation

46.

H

H

H

H

I H-C I H

I

I

I

-c =c -c

H

. I

(A)

(A) (B)

I only I and II only II and III only I, II and III

(C)

(D)

~X

(B)

(C)

H

H

H

I

I

I

H-C -C -C -C -H I

I

Br

Br

H

H

H

H

H

H

I

I

I

I

H-C -C -C -C -H

Which of the following molecules could be obtained by cracking the alkane, C 8H 18 ? CzH4 C6H14

H + Br 2

What is the correct structural formula of X?

. i.

I. II. III.

-

I H

I

I

I

I

H

Br

H

Br

H

H

H

H

I

I

I

H-C -C -C -C -H I

I

Br

H

H

Br

H

H

H

H

I

I

I

cl6H34

(D)

H-C-C-C-C -H I H

/"""/"\.

~..,_T

Br PT'r"' rel="nofollow">. "T"'TTT"'

Br

I H

.,._T,-.""( T~

T"t. .to

,....... ..,-..

-847.

Which of the following substances is a product of a halogenation reaction with methane? (A) (B) (C) (D)

51.

The functional group present in carboxylic acids is (A)

Ammonia Water Hydrogen chloride Nitrogen(IV) oxide

I

H

I

-C=O

OH (B)

I

-c=o

Items 48--49 refer to the following options. (A) (B) (C) (D)

H

C2H4 C2H6 CH3(CH2) 2 COOH CH3(CH2 ) 3CH20H

I

(C)

-c

-OH

I H

Match EACH item below with ONE of the options above. Each option may be used once, more than once, or not at alL

H

(D)

I

-C =C-OH

48.

I

An alcohol

H

49.

An alkane

Items 52-55 refer to the following options. 50.

Which of the following compounds can form a polymer? (A)

H

H (B)

(A) (B) (C)

H

""C=C /

(D)

/

""

H

H

I

I

Bitumen Paraffin oil Methane Propene

Match EACH item below with ONE of the above options. Each option may be used once, more than once or not at all.

H

H-C-C-H

I

(C)

I

H

H

H

H

H

I

I

I

H-C-C-C-H

I

H (D)

I

H H

H

I

I

H-C-C-C-OH

I

H

53.

Is a MAJOR constituent of natural gas

54.

Is used in making plastics

55.

Requires the LEAST amount of oxygen per mole for complete combustion

I

I

I

The residue in the fractional distillation of petroleum

H

H

H

52.

I

H

r.:.t'l t'l"h.T Ttl TUP 1\.TPYT PAGF

-956.

A polyamide is formed by a condensation reaction between a molecule containing (A)

(B)

(C)

(D)

at least one -COOH group with another containing at least one -NH2 group at least one -OH group with another containing at least one -COOH group at least one -OH group with another containing at least one -NH 2 group two -OH groups with another containing two -COOH groups

59.

Which of the following statements is TRUE? The particles in a gas (A) (B) (C) (D)

60.

Which of the following compounds can decolourize potassium manganate(VII)? (A)

57.

The compound, ethene, is described as being unsaturated. This means that the (A)

(B) (C) (D)

58.

carbon atoms in ethene are linked by single bonds carbon atoms in the molecule are very reactive molecule has insufficient hydrogen atoms molecule contains at least one double bond

Nylon is a macromolecule. which is held together by the same linkage as a protein molecule. What is the name given to this type of linkage? (A) (B)

(C) (D)

Amide' bond Double bond Ester linkage Ether linkage

are larger when heated are further apart when heated are very closely packed together have strong forces between them

(B)

H

H

H/

""' H

""'C=C / H

H

I

I

H-C-C-H

I

(C)

(D)

I

H

H

H

H

H

I I I H-C-C-C-H I I I H

H

H

H

I

H

I

H-C-C-H

~ C=O I I

OR

END OF TEST

IF YOU FINISH BEFORE TIME IS CALLED, CHECK YOUR WORK ON TIDS TEST.

()1? 1 ?()1 ()/F ?()14