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621
Which of the following molecules has a linear structure?
A.
NH
3
B.
H
2
O
C.
CO
2
D.
CH
4
View Answer & Discuss (4)
WAEC 2005
622
The volume occupied by a given mass of gas depends on its
A.
diffusion rate
B.
temperature and pressure
C.
degree of solubility
D.
relative density
View Answer & Discuss
WAEC 2005
623
In which of the following reactions is the position of equilibrium not affected by an increase in pressure?
A.
3Fe
(s)
+ 4H
2
O
(g)
⇌ Fe
3
O
4(s)
+ 4H
2(g)
B.
2NO
2(g)
⇌ N
2
O
4(g)
C.
3H
2(g)
+ N
2(g)
⇌ 2NH
3(g)
D.
2SO
2(g)
+ O
2(g)
⇌ 2SO
3(g)
View Answer & Discuss (1)
WAEC 2005
624
The activation energy of a reaction can be altered by
A.
adding a reducing agent
B.
applying a high pressure
C.
using a catalyst
D.
changing the temperature
View Answer & Discuss (1)
WAEC 2005
625
Which of the following factors does not affect the rate of reaction of CaCO
3
with HCI?
A.
temperature of the reaction
B.
solubility of the CaCO
3
C.
concentration of the HCI
D.
surface area of the CaCO
3
View Answer & Discuss
WAEC 2005
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