Chemistry
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Past Questions
Question 1926
waec 1995
a
Stainless steel
b
Soft solder
c
Coinage bronze
d
Amalgam
e
Duralumin
Question 1927
waec 1995
a
removal of the earthly impurities
b
decomposition of the iron ore
c
conversion of iron (lll) to iron (ll) compounds
d
generation of heat for the process
e
conversion of coke to carbon(ll)oxide
Question 1929
waec 1995
a
prevents the growth of algae
b
coagulates suspended particles
c
neutralizes dissolved gases in water
d
reacts with any excess chlorine present
e
increases the amount of dissolved oxygen
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