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Which of the following compounds is not correct about the reaction of sodium material for the manufacture of plastics?
AEthyne
BEthane
CMonochloroethene
DPropene
EButadiene
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Question 732
waec1992
What is the number of oxygen atoms in 32g of the gas? (O = 16, L = 6.0 X 10\(^{23}\) mol\(^{-1}\))
A3.2 X 10 23
B6.0 X 1023
C1.2 X 1024
D1.6 X 1024
E2.0 X 1024
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Question 733
waec1992
The formula (CH3),3 COH is that of a
Apolyhdric alkanol
Bsecondary alkanol
Ctertiary alkanol
Dprimary alkanol
Etrihydric alkanol
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Question 734
waec1992
Which of the following gases will have the highest rate of diffusion under the same conditions? (H = 1, C =12, O = 16, S = 32, CI = 35.5)
AO2
BCI2
CHCI
DH2S
ECO2
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Question 735
waec1992
When sucrose is warmed with Fehling's solution
Aa silver mirror is produced
Bthe solution turns milky
Ca brick-red precipitate is formed
Dthere is no precipitate
Ea blue coloration is produced
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Question 736
waec1992
The following salts are readily soluble in water except
ANa2CO3
BPb(NO3)2
CKCI
DCuCO3
EPbSO4
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Question 737
waec1992
Which of the following involves the decomposition enzymic action?
AEsterification
BFermentation
CDehydration
DPolymerization
ESaponification
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Question 738
waec1992
Consider the compounds represented by the following general formula: X2SO4 Y2(SO4)3, 24H2OX and Y could respectively be
AK and AI
BFe and K
CAI and Fe
DAI and K
ECr and K
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Question 739
waec1992
When iron rusts, it undergoes
Adeliquescence
Bchemical decomposition
Chydrolysis
Dredox reaction
Ecombustion
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Question 740
waec1992
What is the change in the oxidation number of phosphorus in the the reaction represented by the following equation? 4P (s) + 5O(2)(g) → 2P2O5(g)
A0 to + 2
B0 to 5
C+4 to + 2
D+4 to +5
E+4 to +7
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Question 741
waec1992
What is the following compounds will not decompose when heated strongly ?
ANaHCO3
BK2CO3
CMgCO3
DCa(HCO3)2
EZnCO3
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Question 742
waec1992
''The rate a reaction is proportional to the number of effective collisions occurring per second between the reactants''. This statement is associated with the
AKinetic theory
Brate law
Catomic theory
Dcollision theory
Egas laws
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Question 743
waec1992
What is the quantity of electricity produced when a current of 0.5A is passed for 5 hours 45 mins? (1F = 96500C)
A0. 11F
B0.12F
C0.22F
D1.1F
E2.2F
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Question 744
waec1992
The scum formed when soap is mixed with hard water could be
Acalcium trioxocarbonate (IV)
Bpropane- 1, 2, 3 - triol
Ccalcium hydrogentrioxocarbonate (IV)
Dmagnesium tetraoxosulphate (IV)
Ecalcium stearate
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Question 745
waec1992
The halide used widely in photography is
Aammonium chloride
Bcalcum chloride
Csilver bromide
Dsodium brmide
Ealuminium fluroide
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Question 746
waec1992
When air is passed through potash and then pyrogallol, the components are noble gases,
Aoxygen and carbon (IV) oxide
Boxygen and nitrogen
Cnitrogen and water vapour
Dwater vapour and carbon (IV) oxide
Eoxygen and water vapour
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Question 747
waec1992
The reactions ethyne are mainly
Asubstitution reactions
Baddition reactions
Caddition polymerization
Dcatalytic hydrogenation
Ecatalytic halogenation
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Question 748
waec1992
The following acids are monobasic except
Amethanoic acid
Bdioxonitrate lll acid
Cethanedioic acid
Doxochlorate (l) acid
Ehydrobromic acid
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Question 749
waec1992
If the volume of a given mass of gas at 298 K and pressure of 205.2 x 10\(^3\) Nm\(^{-2}\) is 2.12dm\(^3\), what is volume of the gas at s.t.p? (Standard pressure = 101.3 x 10\(^3\) Nm\(^{-2}\), Standard temperature = 273K)
A39.3dm 3
B22.4dm3
C4.93dm3
D3.93dm3
E0.393dm3
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Question 750
waec1992
Which of the following processes is a physical reaction?
