Register
Login
Username
Password
Remember me
Sign in
New here ?
Join Us
Register
Login
Home
Buy Now
Enter Store
Books
Computer Software
Forms
JAMB
Mobile Apps
NECO
Video Lessons Subscription
WAEC
Whatsapp Groups
Post UTME Past Question
Project & Research Materials
Latest News
JAMB News
Post-UTME News
Admission News
O'Level News
Scholarships
Pre-Degree News
Post-Graduate News
Events
Entertainment News
Politics News
Part Time News
Departmental News
General News
Study Abroad News
IJMB News
Gist & Gossips
Noticeboard
NYSC
Nursing School News
Find a Scholarship
Classroom
Enter now to Study
Start a Free Practice Exam
Topic by Topic Video Lessons
Past Questions Video Lessons
Current JAMB Novel
All Novels
Latest JAMB Syllabus
Latest JAMB Brochure
Exam Ranking
Ask a Question
All Questions
School-Based Questions
Academic Questions
Connect2Me
Find Friend
Update your Profile
Sell an Item
Buy an Item
Sell an Item
Events
All Events
Post an Event
Groups
Join a Group
Create a Group
[ Post UTME Begins ]:
View The List Of Schools That Have Released 2026 Post-UTME Forms.
Home
Classroom
Chemistry
WAEC
Chemistry WAEC Past Questions
Exam Type:
All
JAMB
WAEC
NECO
Exam year:
All
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
2000
1999
1998
1997
1996
1995
1994
1993
1992
1991
1990
1989
1988
1985
Question Type:
All
Objective
Theory
Practical
Topics:
All
Matter and Separation Techniques
Particulate Nature of Matter
BASIC CHEMISTRY
Chemical Combinations
Properties of Gases ( Gas Laws )
Properties of Solids and Liquids
Acids, Bases and Salts
Periodic Table
Air and Air Pollution
Water and Solubility Concept
Mass-Volume Concepts
Quantitative and Qualitative Analyses
Electrodes, Electrochemical Series and Electrolysis
Types of Reactions
Energy and Chemical Reactions
Reactions' Rates and Chemical Equilibria
Shapes of Molecules and Solids
Radioactivity ( Nuclear Chemistry )
INORGANIC CHEMISTRY
Hydrogen ( Hydrides )
Oxygen ( Oxides - Ozone )
Carbon - Carbon Compounds
Nitrogen - Nitrogen Compounds
Phosphorus - Phosphorus Compounds
Sulphur - Sulphur Compounds
Halogen Family
Silicon and its Compounds
Metals and their Compounds 1
Transition Metals and their Compounds
ORGANIC CHEMISTRY
Hydrocarbons
Crude Oil
Basic Concepts of Organic Chemistry
Organic Chemistry 2
Applied Chemistry
Chemical Industry
The Solar System
Separation of mixtures and purification of chemical substance
Definition and classification of matter
Elements, compounds and mixtures
Physical and chemical changes
Pure and Impure substances
Separation techniques/processes
Chemical Combination
Stoichiometry
Laws of definite and multiple proportions
Law of conservation of matter
Gay Lussac's law of combining volumes
Avogadro's law
chemical symbols, formulae, equations and their uses
Relative atomic mass based on 12C-12
The mole concept and Avogadro's number
Kinetic Theory of Matter and Gas Laws
States of matter
Change of States of matter
Phenomena Supporting Kinetic theory-Diffusion and Osmosis
Assumptions of Kinetic theory of Gases
The Gas Laws: Boyle, Charles, Graham and Dalton (law of partial pressure), combined gas law
Molar volume and atomicity of gases
The ideal gas equation (PV = nRT)
The relationship between vapour density of gases and the relative molecular mass.
Atomic Structure and Bonding
The concept of atoms, molecules and ions, the works of Dalton, Millikan, Rutherford, Moseley, Thompson and Bohr
Atomic structure, electron configuration, atomic number, mass number and isotopes.
Shapes of S and P orbitals
The Periodic table and periodicity of elements
The variation of the following properties: ionization energy, ionic radii, electron affinity and electronegativity
Chemical bonding
Van der Waals' forces.
Shapes of simple molecules
Nuclear Chemistry
Radioactivity - Types and properties of radiations
Nuclear Reactions - Natural and Artificial Radioactivity, uses and Application.
Air
The natural gaseous constituents and their proportion in the air
Air as a mixture and some uses of the noble gas
Water
Water as a product of the combustion of hydrogen and its composition by volume
Water as a solvent
Hardness of water
Treatment of water for town supply.
Water of crystallization, efflorescence, deliquescence and hygroscopy
Solubility
Unsaturated, saturated and supersaturated solutions
Definition of Solubility and Solubility curves and simple deductions
Solvents for fats, oil and paints
False solution (Suspensions and colloids)
Simple calculations on Solubility
Environmental pollution
Sources and effects of pollutants
Air pollution
Water pollution
Soil pollution
Acids, Bases and Salts
Definition, General characteristics, types and properties of acids, bases and salts
Acids/base indicators, basicity of acids and preparation of salts
Oxides and trioxocarbonate (IV) salts
Qualitative comparison of the conductances of molar solutions of strong and weak acids and bases
Relationship between conductance and amount of ions present, and Buffer solutions
pH and pOH scale; Simple calculations
Acid/base titrations.
Hydrolysis of salts
Oxidation and Reduction (REDOX) Reactions
Oxidation in terms of the addition of oxygen or removal of hydrogen.
Reduction as removal of oxygen or addition of hydrogen.
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
Uses of electrolysis
Electrochemical cells: Redox series
Half-cell reactions and electrode potentials
Calculations on electrolysis
Corrosion as an electrolytic process
Energy changes
Energy changes accompanying physical and chemical changes
Endothermic and exothermic reactions.
Entropy as an order-disorder phenomenon
Spontaneity of reactions
Rates of Chemical reaction
Meaning of the rate of a chemical reaction.
Ways of measuring the rate of chemical reaction
Factors affecting rates of reaction
Arrhenius’ law and Collision theory
Reaction rate curves
Chemical equilibrium
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
Sulphur and its compound
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
Get Questions
Clear Selections
Change Subject
Post a Question
Check Syllabus
Study My Bookmarks
Past Questions Videos
Watch Video Lessons
Download App
76
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
77
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
78
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
79
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
80
A catayst which increases the rate of a chemical reaction does so by
A.
increasing the reaction pathway
B.
increasing the surface area of the reactants
C.
increasing the pressure on the system
D.
decreasing the temperature at which the reaction occurs
E.
decreasing the activation energy of the reaction
View Answer & Discuss
WAEC 1990
«
1
2
...
13
14
15
16
17
18
19
...
408
409
»
Start a Free Practice Test
Subjects
Mathematics
English Language
Chemistry
Physics
Biology
Geography
Literature in English
Economics
Commerce
Accounts - Principles of Accounts
Government
Christian Religious Knowledge (CRK)
Agricultural Science
Islamic Religious Knowledge (IRK)
History
Fine Arts
Music
French
Animal Husbandry
Insurance
Civic Education
Further Mathematics
Yoruba
Igbo
Arabic
Home Economics
Hausa
Book Keeping
Data Processing
Catering Craft Practice
Computer Studies
Marketing
Physical Education
Office Practice
Technical Drawing
Food and Nutrition
Home Management
Sign In
×
Username
Password
Remember me
Sign in
Don't have an account,
Click here to register
