NECO SSCE - Chemistry - 2009 (Objective)

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Question 19 Report

Brain tumors can be located by using an isotope of

carbon - 14

iodine 131

technetium 99 Correct answer

uranium235

uranium 238

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Read lesson note on Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)

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Question 20 Report

How many atoms of chlorine are required to saturate the double bonds of a compound containing a triene?

6 Correct answer

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Read lesson note on Atomic Structure And Bonding (JAMB)

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Question 21 Report

A neon atom is chemically nonreactive because

the electrons at the outermost shell is partially filled

the number of protons equals the number of electrons

the outer electron shell is completely filled Correct answer

there are equal number of protons and neutrons in its nucleus

there are no elections at the outermost shell

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Read lesson note on Atomic Structure And Bonding (JAMB)

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Question 22 Report

The following compounds decolorize acidified potassium tetraoxomanganate (VII) solution EXCEPT

HOCH₂ – CH₂OH Correct answer

H₂C –C =C– CH₃

H₃C – HC = CH₂

H₂C = CH₂

H₃C – C =CH

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Read lesson note on Acids, Bases And Salts (JAMB)

Acids, Bases And Salts

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Question 23 Report

Which of the following equations is NOT balanced?

CH₄(g) + 20₂(9) → CO₂(g) + 2H₂O(g)

CU(S) + HNO₃(aq) → Cu(NO₃)₂(aq) + 4H₂O(I) + NO(g) Correct answer

2KCIO₃(s) → 2KCI(s)+ 3O₂(g)

NaH(s) + H₂O(1) → NaOH(aq) +H₂(g)

Na₂SO₄(aq) + BaCl₂(aq) → BaSO₄(s) + 2NaCl(aq)

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Read lesson note on Stoichiometry And Chemical Reactions (WAEC)

Stoichiometry And Chemical Reactions

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Question 24 Report

What mass of copper in gram would be deposited by a current of 1.00ampere passing for 965 seconds through copper(II) tertraoxosulphate (VI) solution? [Cu 63.5; If = 96500c]

0.32 Correct answer

0.64

3.18

6.35

9.65

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Read lesson note on Electrolysis (JAMB)

Read lesson note on Acids, Bases And Salts (Nigeria Only) (WAEC)

Electrolysis

Acids, Bases And Salts (Nigeria Only)

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Question 25 Report

If the volume of a gas at 35°C is 60cm³, what would be its volume in cm³ at 273k?

39.03

46.81

53.18 Correct answer

67.69

76.92

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Read lesson note on Kinetic Theory Of Matter And Gas Laws (JAMB)

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Question 26 Report

Which of the following is NOT a fraction of petroleum?

Bitumen

Coal Correct answer

Diesel

Kerosene

Petrol

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Read lesson note on Solubility Of Substances (Ghana Only) (WAEC)

Solubility Of Substances (Ghana Only)

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Question 27 Report

The rate of a reaction usually increases with increase in the concentration of reactants because the

distance between particles of the reactants increases

frequency of collision of particles is lower

particles of the reactants gain energy and move faster

reactants from a complex which decomposes rapidly Correct answer

reactants occupy a higher energy level

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Read lesson note on Rates Of Chemical Reaction (JAMB)

Rates Of Chemical Reaction

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Question 28 Report

The furring of kettles and boilers are caused by

calcium hydroxide

calcium hydrogen trioxocarbonate (IV)

calcium trioxocarbonate (IV) Correct answer

calcium tetraoxocarbonate

magnesium tetraoxocarbonate (VI)

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Read lesson note on Acids, Bases And Salts (JAMB)

Acids, Bases And Salts

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Question 29 Report

\( ^{235}_{92}U + ^1_0n → ^{145}_{56}Ba + ^{88}_{36}Kr + 3^1_0n + Energy \)

The equation above represent a/an

alpha particle emission

endothermic reaction

nuclear fission Correct answer

nuclear fusion

thermal dissociation

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Read lesson note on Chemical Bonds (Nigeria Only) (WAEC)

Chemical Bonds (Nigeria Only)

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Question 30 Report

Which of the following statements is NOT correct of group VII elements? They

are diatomic

are good oxidizing agents

are highly electronegative

have high electron affinity

have relatively low ionization potentials Correct answer

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Read lesson note on Atomic Structure And Bonding (JAMB)

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Question 31 Report

The following are ores of metals EXCEPT

bauxite

dolomite

graphite Correct answer

haematite

magnetite

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Read lesson note on Metals And Their Compounds (JAMB)

Read lesson note on Separation Of Mixtures And Purification Of Chemical Substances (JAMB)

Metals And Their Compounds

Separation Of Mixtures And Purification Of Chemical Substances

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Question 32 Report

During the extraction of iron in the blast furnance, slag is produced using

carbon

crylite

limestone Correct answer

oxygen

sulphur

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Read lesson note on Organic Compounds (JAMB)

Organic Compounds

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Question 33 Report

Compound with the general formula CnH\(_{2n+2}\) belong to the_______ group

alkanal

alkane Correct answer

alkanoate

alkene

alkyne

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Read lesson note on Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)

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Question 34 Report

Which of the following non-metals reacts most readily with metals?

Carbon

Chlorine Correct answer

Nitrogen

Phosphorus

Sulphur

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Read lesson note on Non-metals And Their Compounds (JAMB)

Non-metals And Their Compounds

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Question 35 Report

The empirical formula of a hydrocarbon containing 0.12 mole of carbon 0.3 mole of hydrogen is

CH₂

CH₃ Correct answer

C₂H₂

C₂H₄

C₂H₆

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Read lesson note on Chemical Combination (JAMB)

Chemical Combination

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Question 36 Report

When air is passed through alkaline pyrogallol and then lime water, the gases left are

nitrogen and carbon (IV) oxide

nitrogen and noble gases Correct answer

nitrogen and oxygen

nitrogen, carbon (VI) oxide and noble gases

the noble gases

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Read lesson note on Separation Of Mixtures And Purification Of Chemical Substances (JAMB)

Separation Of Mixtures And Purification Of Chemical Substances

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Question 37 Report

The Ideal Gas Law is expressed mathematically as

P1 /T1 = P2/T2

P1/V1 = P2V2

PV =nRT Correct answer

PV =KT

V1/T1 = V2/T2

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Read lesson note on Kinetic Theory Of Matter And Gas Laws (JAMB)

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Question 38 Report

Which of the following is a solid at room temperature?

Argon

Bromine

Chlorine

Fluorine

Iodine Correct answer

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Read lesson note on States Of Matter (WAEC)

States Of Matter

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Question 39 Report

The scientist who discovered the zig-zag movement of gas molecules is

Brownian Correct answer

Dalton

Gay Lussac

Graham

Newton

Answer Details

Read lesson note on Kinetic Theory Of Matter And Gas Laws (JAMB)

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Question 40 Report

What kind of bond exist between carbon and oxygen in C0₃ ^2-?

Co- ordinate Covalent

covalent Correct answer

Electrovalent

Metallic

Van der Waal forces

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Read lesson note on Atomic Structure And Bonding (JAMB)

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Question 41 Report

All the following belong to the same family EXCEPT

glycerol Correct answer

nylon

perspex polyethene

polyethene

polystyrene

Answer Details

Read lesson note on Chemical Bonds (Ghana Only) (WAEC)

Read lesson note on Periodic Chemistry (Ghana Only) (WAEC)

Chemical Bonds (Ghana Only)

Periodic Chemistry (Ghana Only)

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Question 42 Report

Ptotal = P1 + P2 + P3 +…………. Pn, is an expression of law

Boyle’s

Charles’

Dalton’s Correct answer

Graham’s

Gay Lussac’s

Answer Details

Read lesson note on Kinetic Theory Of Matter And Gas Laws (JAMB)

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Question 43 Report

A salt which loses its mass when exposed to air is

deliquescent

effervescent

Efflorescent Correct answer

fluorescent

hygroscopic

Answer Details

Read lesson note on Acids, Bases And Salts (JAMB)

Acids, Bases And Salts

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Question 44 Report

Two elements X and Y with electronic configurations 2,8,2 and 2,8,7 respectively, are likely to combine by _________bonding

covalent

dative

electrovalent Correct answer

hydrogen

metallic

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Read lesson note on Atomic Structure And Bonding (JAMB)

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Question 45 Report

C\(_6\)H\(_{12}\)O\(_6\)

What is the molar mass of the compound above?

[ H=1, C=12, O=16 }

180 Correct answer

123

244

Answer Details

Read lesson note on Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)

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Question 46 Report

The percentage composition of a hydrocarbon is 79.2 carbon 20.8 hydrogen. Calculate its empirical formula [H = 1, C = 12]

CH₃ Correct answer

CH₄

C₂H₂

C₂H₆

Answer Details

Read lesson note on Kinetic Theory Of Matter And Gas Laws (JAMB)

Read lesson note on Separation Of Mixtures And Purification Of Chemical Substances (JAMB)