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736
The collision theory proposes that
A.
reactants collide more frequently to bring about reduction in the reaction rate
B.
all collisions of reactants are effective
C.
reactants must collide with a certain minimum amount of energy to from products
D.
the fewer the collisions the faster the reaction rate
View Answer & Discuss
WAEC 2008
737
Diamond does not conduct electricity because it?
A.
has no free valence electrons
B.
is a giant molecule
C.
contains no bonded electrons
D.
is a solid at room temperature
View Answer & Discuss (1)
WAEC 2008
738
Which of the following set of equations could be used to represent the standard enthalpy of formation of glucose?
A.
6C
(s)
+ 6H
2(g)
+ 3O
2(g)
→ C
6
H
12
O
6(s)
B.
6CO
2(g)
+ 6H
2
O
(l)
→ C
6
H
12
O
6(s)
+ 6O
2(g)
C.
6C
(g)
+ 6H
2(g)
+ 3O
2(g)
→ C
6
H
12
O
6(s)
D.
6C
(g)
+ 6H
2(g)
+ 3O
2(g)
→ C
6
H
12
O
6(aq)
View Answer & Discuss (1)
WAEC 2008
739
The colour of phenolphthalein indicator in dilute HNO
is
A.
colourless
B.
orange
C.
pink
D.
purple
View Answer & Discuss
WAEC 2008
740
An aqueous solution of CaCI
2
is
A.
acidic solution
B.
alkaline solution
C.
a buffer solution
D.
a neutral solution
View Answer & Discuss (4)
WAEC 2008
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