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Matter and Separation Techniques
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BASIC CHEMISTRY
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Basic Concepts of Organic Chemistry
Organic Chemistry 2
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chemical symbols, formulae, equations and their uses
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Properties of a system in equilibrium
Factors governing the equilibrium position
Le Chatelier’s principle
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Metals of the first transition series
Iron Extraction from sulphide and oxide ores
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Alloy
Organic Compounds
Introduction to the tetravalency of carbon
Alkanes: Homologous series in relation to physical properties
Alkenes: Isomerism (structural and geometric isomerism)
Alkynes: Ethyne
Aromatic hydrocarbons e.g. benzene - structure, properties and uses
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1736
The heat accompanying the reaction represented by the equation H
2
O
(l)
→ H
2
O
(g)
is described as the heat of
A.
solution
B.
neutralization
C.
vaporization
D.
sublimation
E.
activation
View Answer & Discuss (2)
WAEC 1990
1737
Aluminum is above iron in the electrochemical series, yet iron corrodes easily on exposure to air while aluminium does not. This is because aluminium
A.
has a lower density than iron
B.
is a better conductor than iron
C.
does not corrode spontaneously
D.
forms thin layer of inert oxide in moist air
E.
forms amphoteric oxides while iron does not
View Answer & Discuss
WAEC 1990
1738
When a solid melts and consequently boils, there is
A.
a gradual increase in the average kinetic energy of the particles
B.
a sudden decrease in the kinetic energy of the particles
C.
no change in the average kinetic energy of the particles
D.
a rapid change in the nature of bonding of the components
E.
a change in the size of the fundamental particles
View Answer & Discuss (3)
WAEC 1990
1739
Which of the following compounds will undergo additional reactions?
A.
Ethyne
B.
Butane
C.
Pentane
D.
Tetrachloromethane
E.
Ethanol
View Answer & Discuss (5)
WAEC 1990
1740
Which of the following reactions does not occur in the blast furnace during the extraction of iron?
A.
Fe
2
O
3
(s)
+ 3CO
(g)
→ 2Fe
(l)
+ 3CO
2
(g)
B.
C
2
+ CO
2
(g)
C.
CaO
(s)
+ SiO
2
(s)
→ CaSiO
3
(s)
D.
FeO
(s)
+ CO
2
(g)
+ Fe
(l)
E.
2Fe
2
O
(s)
→ 4Fe
(l)
3O
2
(g)
View Answer & Discuss (5)
WAEC 1990
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