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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 1002
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 1003
waec2008
A mixture of kerosene and diesel oil can be separated by
Acrystallization
Bdistillation
Cprecipitation
Dsublimation
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Question 1004
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 1005
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 1006
waec2008
In dry Leclanche cell, manganese (IV) oxide acts as
Aa reducing agent
Bbinding agent
Ccatalyst
Ddepolarizer
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Question 1007
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 1008
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 1009
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 1010
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 1011
waec2008
Which of the following compounds would dissolved in water to give a solution whose pH is less than 7?
AAI(NO3)3
BKNO3
CN2O
DNH3
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Question 1012
waec2008
An aqueous solution of CaCI2 is
Aacidic solution
Balkaline solution
Ca buffer solution
Da neutral solution
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Question 1013
waec2008
The colour of phenolphthalein indicator in dilute HNO
Acolourless
Borange
Cpink
Dpurple
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Question 1014
waec2008
Which of the following set of equations could be used to represent the standard enthalpy of formation of glucose?
A6C (s) + 6H 2(g) + 3O2(g) → C 6H12O6(s)
B6CO2(g) + 6H2O (l) → C6H12O6(s) + 6O 2(g)
C6C(g) + 6H 2(g) + 3O2(g) → C6H12O 6(s)
D6C(g) + 6H 2(g) + 3O2(g) → C 6H 12O 6(aq)
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Question 1015
waec2008
Diamond does not conduct electricity because it?
Ahas no free valence electrons
Bis a giant molecule
Ccontains no bonded electrons
Dis a solid at room temperature
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Question 1016
waec2008
The collision theory proposes that
Areactants collide more frequently to bring about reduction in the reaction rate
Ball collisions of reactants are effective
Creactants must collide with a certain minimum amount of energy to from products
Dthe fewer the collisions the faster the reaction rate
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Question 1017
waec2008
When concentrated \(H_2SO_4\) is added to NaCI (s), the gas evolved
Ableaches damp blue litmus paper
Bforms a white preciptate with AgNO3(aq)
Cforms a white precipitate with BaCI2(aq)
Dturns moist red litmus paper blue
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Question 1018
waec2008
In a fixed volume of a gas, an increase in temperature results in an increase in pressure due to an increase in the
Anumber of the collisions between the gas molecules and the walls of the container
Bkinetic energy of the gas
Cnumber of collisions between the gas molecules
Dnumber of repulsion between the gas molecules
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Question 1019
waec2008
Which of the following gases has the lowerst rate of diffusion under the same conditions of temperature and pressure? [H = 1, O = 16, Ne = 20, CI = 35]
AChlorine
BHydrogen
CNeon
DOxygen
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Question 1020
waec2008
Consider the reaction represented by the following equation: Zn(s) + 2HCI(aq) → ZnCI2(aq) + H2(g) what volume of hydrogen gas is produced at s.t.p. when 3.25 g of zinc reacts with excess dilute HCI? [Zn = 65, Molar gas volume at s.t.p. = 22.4 dm-3]
