Core &
Ext. Metals: Uses
Slide 21 of 39
Paper 2 Practice
Questions
1.
J04/2/6 (d) The iron from the blast furnace contains up to 10% by mass
of impurities. The main impurities are carbon, silicon and phosphorus.
The diagram below shows one method of making steel from
iron.
A mixture of oxygen and basic oxides
is blown onto the surface of the molten iron.
(i) What is the
purpose of blowing oxygen onto the molten iron? [1]
(ii) A large amount
of energy is released in the process of steelmaking.
What name is given to chemical reactions which release
energy? [1]