Nagaland PSC Previous Year Exam Paper 1. Which of the following is the lightest metal ? (A) Mercury (B) Silver (C) Lithium (D) Lead 2. The most important ore of Aluminium is ? (A) Bauxite (B) Calamine (C) Calcite (D) Galena 3. The element present in the largest amount in rocks and minerals is ? (A) Carbon […]