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The mass of 800cm3 of a gas X at s.t.p. is 1.0g. What is the molar mass of X? [1 mole of a gas at s.t.p occupies 22.4dm 3]
A18.0g mol-1
B22.4g mol-1
C28.0gmol-1
D36.0gmol-1
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Question 12
waec2004
What is the IUPAC name of CH3CH2COOCH 3?
AEthylethanoate
BMethylethanoate
CMethylpropanoate
DPropylmethanoate
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Question 13
waec2004
Glucose gives a brick-red precipitate with Fehling's solution because it is
Acarbohydrate
Ban alkanoate
Ca reducing sugar
Da non-electrolyte
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Question 14
waec2004
A solution of zinc chloride should not be stored in a container made of
Atin
Bcopper
Caluminium
Dlead
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Question 15
waec2004
Two solutions containing Pb2+ and AI3+ respectively can be distinguished using
ANaOH(aq)
BNH3(aq)
Cconc. HCI3
Dconc. HCI
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Question 16
waec2004
What quantity of electrons in moles is needed to discharge two moles of aluminum from aluminum oxide (AI 2O3)
A1
B2
C4
D6
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Question 17
waec2004
Which of the following subtances will not produce effervescence with dilute hydeochloric acid?
ACopper (ll) trioxocarbonate (IV)
BPotassium hydrogentrioxocarbonate (lV)
CZinc granules
DSodium chloride
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Question 18
waec2004
What are the values of x, y and z respectively in the following in the following equation? \(MnO_{2(s)} + xHCI_{(aq)} → MnCI_{2(g)} + yHO_{(l)} + zCI_{2(g)}\)
A4,1,2
B1,2,1
C2,1,2
D4,2,1
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Question 19
waec2004
What volume of hydrogen would be left over when 300cm3 of oxygen and 1000cm of hydrogen are exploded in a sealed tube? [2H2(g) + O2(g) → 2H2 Og]
A200 cm3
B400 cm3
C600cm3
D700cm3
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Question 20
waec2004
Which of the following salts is not prepared by precipitation?
ALead (ll) trioxocarbonate (lV)
BBarium trioxocarbonate (IV)
CSodium trioxocarbnate (IV)
DCalcium trioxocarbonate (IV)
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Question 21
waec2004
The alloy used extensively in the building industry is
Asteel
Bbronze
Cduralumin
Dtype metal
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Question 22
waec2004
Which of the following pairs of salts undergo hydrolysis?
AAlCI3 and NH4CI
BAICI3 and NaCI
CFeCI3 and KCI
DNa2SO4 and K2 SO4
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Question 23
waec2004
The method of collection of gases prepared in the laboratory depend on their
Aodour and atomicity
Bcolour and odour
Catomicity and density
Dsolubility and density
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Question 24
waec2004
Which of the following equipment is not used to detect radioactivity?
AWilson cloud chamber
BGeiger- muller counter
CMass spectrometer
DPhotographic plate
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Question 25
waec2004
A metal X forms two chlorides with the formulae XCI2 and XCI3. Where is X in the Periodic Table?
What type of bonding exists between X and chlorine in each of the chlorides?
Ametallic bonding
Bionic bonding
Ccovalent bonding
Ddative bonding
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Question 26
waec2004
A metal X forms two chlorides with the formulae XCI2 and XCI3. Where is X in the Periodic Table?
AGroup ll
BGroup llI
Cd-block
Ds-block
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Question 27
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One of the characteristics of transition metals is
Areducing ability
Bductility
Cability to conduct electricity
Dformation of coloured ions
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Question 28
waec2004
A nuclide emits a beta-particle (e) in the process, that atomic number
Aincreases by 1 while the mass numer remains constant
Bdecreases by 2 while the mass number remains constant
Cremains constant while the mass number decreases by 2
Dremains constant while the mass number increases by 1
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Question 29
waec2004
Which of the electrons in the following orbitals will experience the greatest nuclear attraction?
A1s electron of helium
B1s electron of potassium
C23 electron of boron
D2s electron of carbon
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Question 30
waec2004
Which of the following properties of elements deceases generally across a period in the Periodic Table?
