Which of the following is an iron ore? (a) chnnabar (b) calamine (c) haematite (d) rock salt
Answer :
(c) Haematite. Haematite is an iron ore and the compound is iron (III) oxide (Fe2O3).
An important ore of zinc metal is : (a) calamine (b) cuprite (c) pyrolusite (d) haematite
Which of the following is an ore of mercury metal? (a) rock salt (b) cinnabar (c) duralumin (d) zinc amalgam
Which metal can be extracted from each one of the following ores:
(a) bauxite (b) calamine (c) haematite.