Q

The hardest natural substance is ________.

ALP CBT-1, 20-Aug-18 S-1 2018
✓ Answer: B Diamond
The hardest natural substance is Diamond. Copper, iron, and graphite are all relatively soft metals compared to diamond. Diamond is a form of carbon where the atoms are arranged in a very strong and rigid structure. This structure makes it extremely difficult to scratch or break diamond.
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