Haematite is an ore of :
An ore of manganese metal is: (a) bauxite (b) haematite (c) cuprite (d) pyrolusite
An important ore of zinc metal is : (a) calamine (b) cuprite (c) pyrolusite (d) haematite
Which of the following is an iron ore? (a) chnnabar (b) calamine (c) haematite (d) rock salt