HomeEngineeringThe forms in which various metals and non metals occur in nature are called minerals. Which of the following is not a metallic ferrous mineral? 130. The forms in which various metals and non metals occur in nature are called minerals. Which of the following is not a metallic ferrous mineral?By Admin / September 6, 2025 A. Cassiterite B. Sphalerite C. Chalcopyrite D. Calcite ✅ The correct answer is option D.
1. A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm². Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin
2. Transformer cores are normally made from Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin