Multiple choice general knowledge

Diamonds are the hardest substance known to man.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is false - diamonds are not the hardest substance known. While diamonds are the hardest naturally occurring substance on the Mohs scale (10), there are several harder synthetic materials including aggregated carbon nanorods, ultrahard fullerite, and wurtzite boron nitride formed under high pressure.

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