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Which of the following alloys is mainly used in making statues?
ABrass
BBronze
CDuralumin
DSteel
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Question 2
waec2008
Aluminium is a good roofing material because it
Ais strong and does not conduct heat and electricity
Breadily absorbs light
Cforms an oxide film over its surface which prevents corrosion
Dis flexible and can conduct heat
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Question 3
waec2008
Chemicals that are produced in small quantities and with very high degree of purity are
Abulk chemicals
Bfine chemicals
Cheavy chemicals
Dlight chemicals
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Question 4
waec2008
Which of the following substances causes the depletion of the ozone layer in the atmosphere?
ACarbon (IV) oxide
BChlorofluorocarbon
CSulphur (IV) oxide
DHydrocarbons
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Question 5
waec2008
A solution of a salt was acidified with HCI when a few drops of BaCI2 solution were added, a white precipitate was formed. Which of the following anions is present in the salt?
ACO2-3
BNO-3
CSO2-4
DSO2-3
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Question 6
waec2008
A hydrocarbon containing 88.9% carbon has the empirical formula [H = 1 C = 12]
ACH
BCH2
CC2H3
DC2H5
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Question 7
waec2008
Arrange the following compounds in order of increasing boiling point
l.CH\(_3\)CH\(_2\)CH\(_2\)OH
II.CH\(_3\)CH\(_2\)OH
III.CH\(_3\)CH\(_2\)CH\(_2\)CH\(_2\)OH
IV.CH\(_3\)CH\(_2\)CH\(_2\)CH\(_2\)CH\(_3\)
AI < II < IV < III
BIV < III < II < I
CI < II < III < IV
DIV < II < I< III
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Question 8
waec2008
What is the main type of reaction alkenes undergo?
AAddition
BCondensation
CElimination
DSubstitutio
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Question 9
waec2008
The hydrolysis of groundnut oil by potassium hydroxide is known as
Ahydrogenation
Bsaponification
Cesteriffication
Dneutralization
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Question 10
waec2008
When ethanol is heated with excess concentrated tetraoxosulphate (VI) acid, the organic product formed is
Aethanal
Bethanoic acid
Cethane
Dethene
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Question 11
waec2008
Which of the following compounds would not give a precipitate with ammoniacal AgNO3 solution?
ACH3 C≡CCH3
BHC≡CH
CCH3C≡CH
DCH3CH2C≡CH
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Question 12
waec2008
A mixture of kerosene and diesel oil can be separated by
Acrystallization
Bdistillation
Cprecipitation
Dsublimation
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Question 13
waec2008
Calculate the quantity of electricity passed when 0.4 A flows for 1 hour 20 minutes through an electrolytic cell
A4800C
B3840 C
C1920 C
D32 C
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Question 14
waec2008
Oxidation takes place at the anode during electrolysis because the anode
Ais deficient in electrons
Bis deficient in protons
Chas excess electrons
Dhas attraction for positive ions
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Question 15
waec2008
In dry Leclanche cell, manganese (IV) oxide acts as
Aa reducing agent
Bbinding agent
Ccatalyst
Ddepolarizer
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Question 16
waec2008
Consider the equilibrium reaction represented by the equation: 2SO2(g) + O2(g) ⇌ 2SO3(g) ∆H = - 197 kJmol-1. At equilibrium, increase in the total pressure of the system brings about
Adecrease in rate of the reaction of the system
Bdecrease in temperature of the system
Cincrease in temperature of SO3
Dincrease in concentration of SO2
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Question 17
waec2008
The high solubility of ethanol in water is due to its
Alow boiling point
Blow freezing point
Ccovalent nature
Dhydrogen bonding
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Question 18
waec2008
When 100 cm3 of a saturated solution of KCIO3 at 40oC is evaporated, 14 g of the salt is recovered what is the solubility of KCIO3 at 40oC? [KCIO3 = 122.5]
A11.42 mol dm-3
B8.80 mol dm-3
C1. 14 mol dm-3
D0.88 mol dm-3
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Question 19
waec2008
Consider the reaction represented by the question below: KOH(aq) + HCI(aq) → KCI(aq) + H2O(l) What volume of 0.25 mol dm-3 KOH would be required to completely neutralize 40 cm3 of 0.10 mol dm -3 HCI?
A40 cm3
B32cm3
C24cm3
D16cm3
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Question 20
waec2008
Which of the following compounds would dissolved in water to give a solution whose pH is less than 7?
