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1336
In the redox reaction\( 2Fe^{2+} + CI_2 → 2Fe^{3+} + 2Cl^-\)
A.
Cl
2
is reduced because it has lost electrons
B.
Cl
2
is reduced because its oxidation number has decreased
C.
Cl
2
is reduced because its molecule is change to two ions
D.
Fe
2+
is reduced because it has lost electrons
E.
Fe
2+
is reduced because it has gained electrons
View Answer & Discuss (8)
JAMB 1979
1337
An anhydride is?
A.
a compound wich has no water of crystallization
B.
an oxide whose solution in water has a PH greater than 7
C.
an oxide whose solution in water has a PH less than 7
D.
an oxide that has hydrogen atoms
E.
an amphoteric oxide
View Answer & Discuss (23)
JAMB 1979
1338
In which of the following reactions is sulphur dioxide acting as an oxidizing agent?
A.
SO
2
+ 2HNO
3
→H
2
SO
4
+ NO
2
+ Heat
B.
2SO
2
+ 2H
2
O + O
2
→ 2H
2
SO
4
C.
SO
2
+ 2H
2
O + CI
2
→ H
2
SO
4
+ 2HCI
D.
SO
2
+ 2H
2
S → 3S + 2H
2
O
E.
SO
2
+ H
2
O → H
2
SO
3
View Answer & Discuss (4)
JAMB 1979
1339
Calcium hydroxide and ammonium chloride when heated together will give an important product. This compound may be obtained dry by
A.
dissolving it in water, recrystallizing it and then drying in the oven
B.
passing it through a concentrated aqueous solution of sodium hydroxide
C.
passing it through calcium oxide
D.
passing it through concentrated sulphuric acid
E.
passing it through anhydrous calcium choride
View Answer & Discuss (9)
JAMB 1979
1340
Starch can be converted to ethyl alcohol by
A.
distillation
B.
fermentation
C.
isomerization
D.
cracking
E.
cooking
View Answer & Discuss (2)
JAMB 1979
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