issb general knowledge MCQ #295

The hardest natural substance is:

issb general knowledge MCQ #295

  1. Question 1

    Q1. The hardest natural substance is:

    • A) Iron
    • B) Gold
    • C) Diamond
    • D) Quartz

    Answer: Diamond

    Explanation: Diamond is the hardest natural material on the Mohs scale. This fact often appears in ISSB academic and general knowledge sections.