What is an amalgam? State it's use with an example.

(a) State two properties of brass that render it more useful for some purposes than it's components.

(b) Name a metal which forms a liquid alloy at ordinary temperature.

Name the following:

(a) A metal which is liquid at room temperature.

(b) A metal which is always present in the amalgam.

(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) A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium

(f) Name an allotrope of a non-metal that allows electricity to pass through it.

Name the alloy used for the following purposes.

(a) Making electric circuits

(b) Making medals

(c) Making parts of watches

(d) Surgical instruments

(e) Aircraft