Q. Which one of the following is not a sulphide ore ?

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A

Galena

B

Iron pyrites

C

Magnetite

D

Copper glance

Solution:

Galena, also called lead glance, is the natural mineral form of lead(II) sulphide $(P b S)$ .
The mineral pyrite or iron pyrite, also known as fool's gold, is an iron sulphide with the chemical formula $F e S_{2}$
Copper glance is copper sulphide $C u_{2} S$ .
Magnetite is a mineral and one of the main iron ores, with the chemical formula $F e_{3} O_{4}$ .