SCIENCE
Paper 2 (Chemistry) - 2007
(One hour and a half)
Question 4
(a) The following is an extract from 'Metals in the Service of Man, Alexander and Street/Pelican 1976':
'Alumina (aluminium oxide) has a very high melting point of over 2000°C so that it cannot readily be liquefied. However, conversion of alumina to aluminium and oxygen, by electrolysis, can occur when it is dissolved in some other substance.'