Multiple choice

The allotropic form of carbon known as charcoal

  1. is amorphous

  2. consists of micro-crystals of graphite

  3. consists of micro-crystals of diamond

  4. is lighter than water
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A Correct answer
Explanation

There are two allotropic forms of carbon. (1) Crystalline form: There are three crystalline forms of carbon: diamond, graphite and bucky ball. (2) Amorphous form: There are various amorphous forms of carbon: coal, coke, charcoal, lampblack, gas carbon, etc.

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