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Introduction to the tetravalency of carbon
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2021
The following oxides react with water except
A.
Na
2
O
B.
SO
3
C.
NO
2
D.
CO
2
E.
CuO
View Answer & Discuss (4)
WAEC 1998
2022
Which of the following is not a property of trioxonitrate (V) salts?
A.
Positive reaction to the brown ring test
B.
Ability to dissolve in cold water
C.
Decomposition on being strongly heated
D.
Production of effervescence with saturated Na
2
CO
3
solution
E.
Evolution of gas with concentrated H
2
SO
4
and copper turnings
View Answer & Discuss (1)
WAEC 1998
2023
Which of the following methods is suitable for the preparation of an insoluble salt?
A.
Action of an acid on a metal
B.
Double decomposition
C.
Neutralisation
D.
Action of an acid on a trioxocarbonate (IV)
E.
Action of an acid on an oxide
View Answer & Discuss
WAEC 1998
2024
What is the function of sulphur (IV) oxide in the reaction represented by the following equation? SO
2(aq)
+ 2H
2
S
(g)
→ 3S
(s)
+ 2H
2
O
(l)
A.
Dehydrating agent
B.
Oxidising agent
C.
Bleaching agent
D.
Acid
E.
Precipitant
View Answer & Discuss (1)
WAEC 1998
2025
Which of the following will produce oxygen and hydrogen during its electrolysis using platinum electrode?
A.
Glucose solution
B.
Aqueous copper (ll) tetraoxosulphate (IV)
C.
Dilute sodium chloride solution
D.
Concentrated hydrochloric acid
E.
Dilute copper (ll) chloride solution
View Answer & Discuss (5)
WAEC 1998
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