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21
Bubbling of carbon (IV)oxide into calcium hydroxide solution results in the formation of
A.
CaCO
3
B.
CuCO
3
C.
ZnCO
3
D.
Na
2
CO
3
E.
MgCO
3
View Answer & Discuss (3)
WAEC 1988
22
Which of the following is not decomposed by heat?
A.
CaCO
3
B.
CuCO
3
C.
ZnCO,sub>3
D.
Na
2
CO
3
E.
MgCO
3
View Answer & Discuss (2)
WAEC 1988
23
Which of the following is not true of the rusting of iron?
A.
Rusting is a reduction process
B.
Rusting of iron takes place in the presence of oxygen and moisture
C.
the rust formed is reddish brown
D.
the major constituent of rust is hydrated iron (lll) oxide
E.
rusting is similar to burning
View Answer & Discuss (3)
WAEC 1988
24
Which of the following is not true of the rusting of iron?
A.
Rusting is a reduction process
B.
Rusting of iron takes place in the presence of oxygen and moisture
C.
the rust formed is reddish brown
D.
the major constituent of rust is hydrated iron (lll) oxide
E.
rusting is similar to burning
View Answer & Discuss (3)
WAEC 1988
25
What volume of oxygen will be left unreacted when a mixture of 100cm
3
of hydrogen and 200cm,sup>3,/sup> of oxygen are exploded in a eudiometer?
A.
300cm
3
B.
200cm
3
C.
150cm
3
D.
100cm
3
E.
50cm
3
View Answer & Discuss (8)
WAEC 1988
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