Multiple choice general knowledge science & technology

Hardest cutting material

  1. diamond

  2. ceramic oxide

  3. high speed steel

  4. aluminium oxide
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A Correct answer
Explanation

Diamond is the hardest known natural material, ranking 10 on the Mohs hardness scale. Its exceptional hardness comes from the strong covalent bonds between carbon atoms in its crystal structure, making it superior for cutting applications compared to ceramic oxides, HSS, or aluminum oxide.

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