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Chemical Engineering Basics - Engineering

Q1:

Which of the following is not an ore of zinc?

A Cerrusite

B Franklinite

C Calamine

D Troosite

ANS:A - Cerrusite

Troosite is not an ore of zinc. Cerrusite, Franklinite, and Calamine are all ores of zinc:

  1. Cerussite (lead carbonate) can contain zinc as an impurity.
  2. Franklinite is a mineral that often contains zinc, along with other elements such as iron and manganese.
  3. Calamine (zinc carbonate) is a primary ore of zinc.
Troosite, however, is not a known ore of zinc. It appears to be a misspelling or a non-existent mineral.