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31
Aqueous sodium trioxocarbonate (IV) solution is alkaline because
A.
acid from which it is formed is strong
B.
sodium is an alkali metal
C.
sodium trioxocarbonate (IV) is decomposed by water
D.
sodium trioxocarbonate (lV) is stable to heat
E.
sodium triocarbonate (IV) is hydrolysed in water
View Answer & Discuss
WAEC 1988
32
Which of the following correctly explains why iodine crystals change directly into the gaseous state when heated?
A.
lodine crystals sublime
B.
lodine atoms are held together by strong forces
C.
lodine molecules are held together by weak forces
D.
lodine molecules are covalent
E.
lodine is a solid at room temperature
View Answer & Discuss (1)
WAEC 1988
33
Which of the following is a waste product in the Solvary Process for the manufacture of sodium trioxocarbonate (IV)?
A.
Ammonium chloride
B.
Brine
C.
Limestone
D.
Calcium oxide
E.
Calcium chloride
View Answer & Discuss (3)
WAEC 1988
34
When copper (ll) chloride solution is treated with excess aqueous ammonia, a deep blue solution results This is due to the presence of
A.
(CuNH
4
)
3+
ions
B.
(CuCI
4
)
2-
ions
C.
[Cu(OH)
4
]
2-
ions
D.
Cu(H
2-
O)
4
2+
IONS
E.
[cU(NH
3
)
4
]
ions
View Answer & Discuss (3)
WAEC 1988
35
The complex salt formed when aluminium dissolves in sodium hydroxide solution is
A.
Na
3
AI(OH)
4
B.
Na
2
AI(OH)3
C.
NaAI(OH)
3
D.
Na
4
AI(OH)
4
E.
NaAI(OH)
4
View Answer & Discuss (1)
WAEC 1988
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