Question

Name the following:
(a) A metal which is liquid at room temperature.
(b) A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
(c) The process of heating an ore to a high temperature in the presence of air.
(d) The compound formed by the reaction between calcium oxide and silica.
(e) The middle region of the blast furnace.

Answer 1

(a) Mercury is a metal that remains in liquid state at room temperature.
(b) Cryolite or sodium aluminium flouride (Na₃AlF₆) is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
(c) The process of heating an ore to a high temperature in the presence of air is called roasting.
(d) The compound formed by the reaction between calcium oxide and silica is calcium silicate (CaSiO₃).
(e) The middle region of the blast furnace is called bosh.