2009 - JAMB Chemistry Past Questions and Answers - page 4
31
Hydrogen sulphide gas can act as
A
an oxidizing agent
B
a dehydrating agent
C
a bleaching agent
D
a precipitating agent
correct option: d
Users' Answers & Comments32
The gasification of coke is used for the manufacturing of
A
producer gas
B
natural gas
C
synthetic gas
D
industrial gas
correct option: c
Users' Answers & Comments33
The gas that is most useful in protecting humans against solar radiation is
A
chlorine
B
ozone
C
carbon (IV) oxide
D
hydrogen sulphide
correct option: b
Users' Answers & Comments34
Which of the following allotrope of carbon is a constituent of a lead pencil?
A
Graphite
B
Diamond
C
Lampblack
D
Soot
correct option: a
Users' Answers & Comments35
which of the following metals will show the highest metallic character?
A
Zinc
B
Copper
C
Barium
D
Calcium
correct option: d
Users' Answers & Comments36
Copper metal dissolves in concentrated trioxonitrate (V) acid with the resultant evolution of
A
CO2
B
SO2
C
NO2
D
CO
correct option: c
Users' Answers & Comments37
The type of iron that is best suited for welding, making nails, chains and iron rods is
A
pig iron
B
wrought iron
C
cast iron
D
iron pyrites
correct option: b
Users' Answers & Comments38
In the electrolytic extraction of aluminum, the function of the molten cryolite is to
A
precipitate aluminium hdroxide
B
lower the melting point of aluminium oxide
C
act as a raw materials
D
act as a solvent
correct option: b
Users' Answers & Comments39
One of the products of the thermal decomposition of sodium trioxonitrate (V) is
A
sodium
B
nitrogen
C
sodium dioxonitrate (III)
D
sodium oxide
correct option: c
Users' Answers & Comments40
A cracking process in petroleum refining can be represented by
A
heptane to heptene
B
heptane to 3-methylhexane
C
heptane to propene and butane
D
heptane to 2,3,3-trimethybutane
correct option: c
Users' Answers & Comments