Question

Calcination can be employed for the how many of the following ores?
Limonite, siderite, zincite, zinc blende, calamine, cryolite, wolframite, cassiterite

Answer 1

Answer: 3

Limonite $-2F{e}_2{O}_3.3H_{2}O$
Siderite $-FeC{O}_3$
Zincite - $ZnO$
Zinc blende - $ZnS$
Calamine $-ZnC{O}_3$
Cryolite - $N{a}_{3}Al{F}_6$
Wolframite $-FeW{O}_4$
Cassiterite - $Sn{O}_2$
Calcination is generally employed for carbonat and hydrated oxide ores. Hence, calcination ca be employed for limonite, siderite and calamine