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256
Which of the following is not correct of the reaction represented by the equation below? 2C
(s)
+ O
2(g)
→ 2CO
(g)
; ∆H = - xKJ
A.
there is an increase in entropy ;
B.
There is anincrease in gaseous volume
C.
Carbon (lV) oxide is produced
D.
The oxidation number of carbon increases from 0 to +2
E.
The reaction is exothermic
View Answer & Discuss (4)
WAEC 1995
257
H
3
O
+
(aq)
+ OH-
(aq)
→ 2H
2
O
(l)
. The heat change accompanying the process represented by the equation above is the heat of
A.
neutralization
B.
formation
C.
solution
D.
dilution
E.
hydration
View Answer & Discuss (1)
WAEC 1995
258
The following statements about graphite are correct except that it
A.
is used as a lubricant
B.
has a network structure
C.
contains mobile free electrons
D.
is good conductor
E.
is an allotrope of carbon
View Answer & Discuss (1)
WAEC 1995
259
Which of the following is hydrocarbons is unsaturated?
A.
Ethane
B.
Benzene
C.
Propane
D.
2 - methylbutane
E.
2,2,4-trimethylpentane
View Answer & Discuss (1)
WAEC 1995
260
The following can be obtained directly from the destructive distillation of coal except
A.
ammoniacal liquor
B.
coke
C.
producer gas
D.
coal gas
E.
coal tar
View Answer & Discuss (2)
WAEC 1995
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