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Chemistry WAEC Past Questions
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Matter and Separation Techniques
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BASIC CHEMISTRY
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Carbon - Carbon Compounds
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Phosphorus - Phosphorus Compounds
Sulphur - Sulphur Compounds
Halogen Family
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Metals and their Compounds 1
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Basic Concepts of Organic Chemistry
Organic Chemistry 2
Applied Chemistry
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The Solar System
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chemical symbols, formulae, equations and their uses
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The mole concept and Avogadro's number
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Change of States of matter
Phenomena Supporting Kinetic theory-Diffusion and Osmosis
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Shapes of S and P orbitals
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Van der Waals' forces.
Shapes of simple molecules
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The natural gaseous constituents and their proportion in the air
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Water of crystallization, efflorescence, deliquescence and hygroscopy
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Hydrolysis of salts
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Oxidation and reduction in terms of electron transfer
Use of oxidation numbers in defining REDOX reactions and balancing simple equations.
IUPAC nomenclature of inorganic compounds using oxidation number
Tests for oxidizing and reducing agents
Electrolysis
Electrolytes and non-electrolytes, and Faraday's laws of electrolysis
Electrolysis of dilute H2SO4, aqueous CuSO4, CuCl2 solution, dilute and concentrated NaCl solutions and fused NaCl
Factors affecting discharge of ions at the electrodes
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Electrochemical cells: Redox series
Half-cell reactions and electrode potentials
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Corrosion as an electrolytic process
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Entropy as an order-disorder phenomenon
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Arrhenius’ law and Collision theory
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Definition of the following terminologies: systems, reactions and dynamic equilibrium.
Properties of a system in equilibrium
Factors governing the equilibrium position
Le Chatelier’s principle
Equilibrium constant
Non-metals and their compounds
Hydrogen and Hydrides
Halogens: Chlorine as a representative element of the halogen
Oxygen and Oxides
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Nitrogen and its compounds
Carbon: Allotropes, Uses and properties.
Metals and their compounds
General properties of metals
Alkali metals e.g. sodium
Alkaline-earth metals
Aluminium and its compound
Tin Extraction from its ores
Metals of the first transition series
Iron Extraction from sulphide and oxide ores
Copper Extraction from sulphide and oxide ores
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
Alkanols: Primary, secondary, tertiary
Alkanals and alkanones
Alkanoic acids
Alkanoates
Amines (Alkanamines): Primary, Secondary, and tertiary
Carbohydrates
Proteins: Primary structures, hydrolysis and tests
Enzymes and their functions
Polymers: Natural and synthetic rubber
Industrial Chemistry
Chemical industries: Types, raw materials and relevances
Economics of Industrial process
Importance of industrial chemistry in Nigeria
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301
During water treatment for town supply, water is passed through layers of send beds in order to
A.
soften the water
B.
filter the water
C.
decolorize the water
D.
destroy the germs in the water
E.
coagulate colloidal particles in the water
View Answer & Discuss (2)
WAEC 1996
302
The cleansing action of soap in hard water is not satisfactory because soap
A.
forms insoluble calcium and magnesium salts
B.
is made from fats and oils
C.
has an organic component
D.
alters the surface tension of water
E.
is a sodium salt of higher carboxylic acids
View Answer & Discuss
WAEC 1996
303
What is the role of MnO
2
in the reaction represented by the following equation?MnO
2
+ 4HCI
2
+ CI
2
+ 2H
2
O
A.
Bleaching agent
B.
Oxidizing agent
C.
Amphoteric oxide
D.
Basic oxide
E.
Catalyst
View Answer & Discuss
WAEC 1996
304
Nitrogen is prepared on a large scale by the
A.
fractional distillation of liquefied air
B.
decomposition of ammonium dioxonitrate (lll)
C.
electrolysis of brine
D.
Haber process
E.
Contact process
View Answer & Discuss
WAEC 1996
305
Ammonia gas is suitable for performing the 'Fountain' experiment because the gas is
A.
colourless
B.
a cooling agent
C.
alkaline to litmus
D.
a reducing agent
E.
very soluble in water
View Answer & Discuss (2)
WAEC 1996
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