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Which of the following metals exists as liquid at ordinary temperature?
ACopper
BGold
CMercury
DSilver
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Question 2
waec2010
Which of the following substances cannot be classified as a heavy chemical?
AAgNO3
BCaO
CCaOCI2
DH2SO4
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Question 3
waec2010
The main function of limestone in the blast furnance is to
Aact as a reducing agent
Bact as a catalyst
Cremove impurities
Dsupply carbon (IV) oxide
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Question 4
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Compound N reacts with sodium metal to produce a gas that gives a 'pop' sound with a burning splint N also react with ethanoic acid to give a sweet smelling liquid. Compound N is an
Aalkanol
Balkanoate
Calkane
Dalkanoic acid
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Question 5
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An organic compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen. What is the empirical formula of the compound? [O = 16.0, C = 12.0, H = 1.0]
AC2HO
BCHO
CCH2O
DCHO2
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Question 6
waec2010
The IUPAC name of C2H6COOC2,/sub>H6 is
Aethyethanoate
Bethylproanoate
Cpropylethanoate
Dpropylpropanoate
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Question 7
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The products of fermentation of sugar are
Acarbon(IV) oxide and water
Bethanol and carbon (IV) oxide
Cethanol and water
Dethanol and enzymes
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Question 8
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An advantage of detergent over soap is that detergents
Aare readily available
Bare in powerdered from
Care non-biodegradable
Dlather readily with water
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Question 9
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Fact and oils are used as raw materials in the following industries except
Apaint industry
Bplastic industry
Cmargarine industry
Dcosmetics industry
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Question 10
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The quantity of electricity required to discharge 1 mole of univalent ion is
A9,600 C
B48,250 C
C96,500 C
D193,00 C
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Question 11
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What is the change in oxidation number of manganes in the reaction represented by the following equation? MnO-4(aq) + 8H+(aq) + 5e- → Mn2+(aq) + 4H2O(l)
A+3 to + 2
B+ 4 to + 2
C+ 5 to + 2
D+ 7 to 2
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Question 12
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Which of the following statements about the electrolysis of CuSO4(aq) using copper cathode and platinum anode is not correct?
ACopper is deposited at the cathode
BOxygen is liberated at the anode
Cit is used for the purification of copper
DThe solution becomes acidic
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Question 13
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Which of the following statements about the cell notation Mg/Mg\(^{2+}\)//Cu\(^{2+}\)/Cu is correct?
Acopper is the anode
BManesium is reduced
CMagnesium is the anode
DThe double line represents the electrodes
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Question 14
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The rate of chemical reaction of solids are not affected by
Acatalyst
Bpressure
Cparticle size
Dtemperature
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Question 15
waec2010
Consider the equilibrium reaction represented by the following equation: 2SO2(g) + O2(g) ⇌ 2SO3(g); ∆H = 395.7 kJmol-1 Which of the following statements about the equilibrium system is correct?
AAddition of catalyst changes the equailibrium position
BDecrease in pressure increase in temperature SO3
CDecrease in pressure increases the equilibrium concentration of O2
DIncrease in temperatur favours the forward reaction
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Question 16
waec2010
Which of the following factors would not affect the solubility of a gas?
AConcentration
BNature of solvent
CPressure
DTemperature
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Question 17
waec2010
Which of the following chlorides is insoluble in water?
AAgCI
BKCI
CNH4CI
DZnCI2
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Question 18
waec2010
The following substances are normal salts except
AAI(NO3)3
BFeSO4
CMg(OH)NO3
DNaCI
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Question 19
waec2010
Which of the following equimolar solutions would have the highest conductivity?
