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Chemistry WAEC / WASSCE 1992 Kinetic Theory of Matter & Gas Laws
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)
A
O2
B
CI2
C
HCI
D
H2S
E
CO2
medium Difficulty
Chemistry WAEC / WASSCE 1992 Organic Chemistry II: Functional Groups, Polymers & Biomolecules
The formula (CH3),3 COH is that of a
A
polyhdric alkanol
B
secondary alkanol
C
tertiary alkanol
D
primary alkanol
E
trihydric alkanol
medium Difficulty
Chemistry WAEC / WASSCE 1992 Organic Chemistry I: Hydrocarbons & Crude Oil
Which of the following compounds is not correct about the reaction of sodium material for the manufacture of plastics?
A
Ethyne
B
Ethane
C
Monochloroethene
D
Propene
E
Butadiene
medium Difficulty
Chemistry WAEC / WASSCE 1992 Periodic Table & Periodicity
The energy required to remove the most loosely bound electron from an atom in the gaseous state is known as the
A
bond energy
B
ionization energy
C
potential energy
D
activation energy
E
kinetic energy
medium Difficulty
Chemistry WAEC / WASSCE 1992 Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Vulcanization of rubber
A
stops the growth of fungus on the rubber
B
increases the solubility of the rubber
C
decreases the elasticity of the rubber
D
hardnes the rubber through cross-linkage
E
removes sulphur from the rubber
medium Difficulty
Chemistry WAEC / WASSCE 1992 Chemical Energetics & Thermochemistry
If a reaction is said to be exothermic, which of the following statements is a correct deduction from the information?
A
the reaction vessel gets hotter as the reaction proceeds
B
∆H for the reaction is positive
C
the rate of the reaction increases with time
D
the activation energy of the reaction is high
E
the rate of the reaction increases with time
medium Difficulty
Chemistry WAEC / WASSCE 1992 Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Which of the following statement is not correct about esterification?
A
It is a slow reaction
B
the process is reversible
C
it is similar to hydrolysis
D
it is catalysed by acids
E
the products usually have a fruity smell
medium Difficulty
Chemistry WAEC / WASSCE 1992 Atomic Structure, Orbitals & Nuclear Chemistry
Which of the following statements is not correct? The 4s orbital
A
is defined by the quantum number 1 = O
B
is of higher energy than the 3d orbital
C
contains a maximum of two electrons
D
is spherical about the nucleus
E
is filled before the 4p orbital
medium Difficulty
Chemistry WAEC / WASSCE 1992 Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following pH values is likely to be that of a slightly alkaline solution?
A
2
B
5
C
7
D
8
E
13
medium Difficulty
Chemistry WAEC / WASSCE 1992 Metals, Transition Elements & Extraction
Which of the following minerals contains flurine as one of its constituent elements?
A
Cryolite
B
Bauxite
C
Potash alum
D
Kaolin
E
Mica
medium Difficulty
Chemistry WAEC / WASSCE 1992 Organic Chemistry II: Functional Groups, Polymers & Biomolecules
The product of the reaction between propanoic acid and ethanol is
A
prophlmethanoate
B
ethylethanoate
C
methylpropanoate
D
propylethanoate
E
ethylpropanoate
medium Difficulty
Chemistry WAEC / WASSCE 1992 Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following groups contains entirely linear molecules?
A
H 2NH3O 2
B
CO2NH 3 2
C
H 2CH4N2
D
CO2H2N2
E
CH 4O 2CO 2
medium Difficulty
Chemistry WAEC / WASSCE 1992 Oxidation, Reduction & Redox Reactions
What is the value of n in the following equation? XO-4 +8H + + ne- → X2 + + 4H2O
A
2
B
3
C
4
D
5
E
6
medium Difficulty
Chemistry WAEC / WASSCE 1992 Nature of Matter & Separation Techniques
A dye is suspected to have contaminated a lollipop. Which of the following is the best method by which the contaminant may be isolated?
A
Fractional distillational
B
Recrystallization
C
Filtration
D
Paper chromatography
E
Evaporation
medium Difficulty
Chemistry WAEC / WASSCE 1992 Oxidation, Reduction & Redox Reactions
Which of the following accounts for the difference in the mode of conduction of electricity by metals and aqueous salt solutions?
A
Electrons are present in metals but not in salt solutions
B
Metals are conductors while salts are electrolytes
C
Electricity is carried by mobile elrctrons in metals but by ions is aqueous salt solution
D
salts ionize in aqueous solutions while metals do not
E
Metals are reducing agents while salts are not
medium Difficulty
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