Asked in PPSC, FPSC and other one-paper exams (compiled from unofficial resources).
Earth Science & GeologyRocks, Minerals & Landforms
The hardest substance in the world is known as?
- A.DiamondCorrect answer
- B.Graphite
- C.Tungsten
- D.Quartz
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Practice these MCQs in the appQuick fact: The hardest naturally occurring substance in the world is Diamond.