Multiple choice

Carborundum is

  1. silicon dioxide

  2. silicon carbide

  3. silicon nitride

  4. silicon phosphide
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carborundum is the trade name for silicon carbide (SiC), an extremely hard synthetic compound used as an abrasive and in cutting tools. It's not silicon dioxide (quartz), nitride, or phosphide.

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