Multiple choice general knowledge science & technology

In which of the following activities silicon carbide is used?

  1. Making cement and glass

  2. Disinfecting water of ponds

  3. cutting very hard substances

  4. Making casts for statues
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Silicon carbide is an extremely hard material (9-9.5 on Mohs scale) used as an abrasive and in cutting tools for hard substances. It is not used in cement/glass production, water disinfection (that's chlorine), or statue casting (that's plaster/metal).

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