In the extraction of iron, hot air is introduced into the...
In the extraction of iron, hot air is introduced into the blast furnace through?
valves
open-hearths
arcs
tuyeres
Correct answer is D
Pre-heated air at about 600ºC is blown into the furnaces from the bottom through the tuyeres.
Which of the following factors does NOT affect the rate of a chemical reaction? ...
Which of the following substances is suitable solvent for perfumes? ...
The most suitable metal that can be used as lightning conductor is? ...
Which of the following compounds is a base? ...
On exposure to hydrogen sulphide, moist lead (II) ethanoate paper turns ...
An element is electronegative if ...
The oxidation number of phosphorus in PO 3/4 is ...
Which of the following physical properties decreases across the Periodic Table? ...