Which of the following is not an ore of zinc?
(a) Limonite
(b) Zincite
(c) Calamine
(d) Franklinite
I got this question in examination.
This interesting question is from Non-Ferrous Metals and Alloys topic in portion Steel, Timber, Mortar, Plastics, Non-Ferrous Metals and Alloys of Construction & Building Materials