Multiple choice general knowledge

In which of the following activities silicon carbide is used?

  1. Making cenieut and glass

  2. Treating water of ponds

  3. Making casts for statues

  4. Cutting very hard substances
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Silicon carbide is an extremely hard material (hardness ~9.5 on Mohs scale) and is widely used as an abrasive for cutting and polishing very hard substances including metals, ceramics, and other materials. It is also used in making cutting tools and grinding wheels.

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