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Which of the following laws is obeyed If at constant temperature, 200cm of hydrogen at 1.5 × 10m5Nm-2pressure becomes 300cm3 at 1.0 × 105Nm-2 pressure?
AAvogadro’s
BBoyle’s
CCharles’
DFaraday’s
EGraham’s
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Question 22
neco2008
The type of reaction ethyne mainly undergoes is
Aaddition
Bcarboxylation.
Cesterification
Dsaponification
Esubstitution
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Question 23
waec2008
Which of the following alloys is mainly used in making statues?
ABrass
BBronze
CDuralumin
DSteel
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Question 24
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 25
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 26
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 27
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 28
waec2008
A hydrocarbon containing 88.9% carbon has the empirical formula [H = 1 C = 12]
ACH
BCH2
CC2H3
DC2H5
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Question 29
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 30
waec2008
What is the main type of reaction alkenes undergo?
AAddition
BCondensation
CElimination
DSubstitutio
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Question 31
waec2008
The hydrolysis of groundnut oil by potassium hydroxide is known as
Ahydrogenation
Bsaponification
Cesteriffication
Dneutralization
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Question 32
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 33
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 34
waec2008
A mixture of kerosene and diesel oil can be separated by
Acrystallization
Bdistillation
Cprecipitation
Dsublimation
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Question 35
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 36
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 37
waec2008
In dry Leclanche cell, manganese (IV) oxide acts as
Aa reducing agent
Bbinding agent
Ccatalyst
Ddepolarizer
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Question 38
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 39
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 40
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]
