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How many allotropic forms of carbon are ...

How many allotropic forms of carbon are there?

A

Six

B

Five

C

Four

D

Three

Text Solution

Verified by Experts

The correct Answer is:
A
Three crystalline allotropes: diamond, graphite , and fullerenes. They have well-defined crystal structures. Due to different structures, they possess different properties. Three amorphous allotropes: carbon black, coke, and charcoal. They are all impure forms of graphite or fullerenes.
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Knowledge Check

  • Which one of the following is not correct for the allotropic forms of carbon ?

    A
    `C_(60)` molecule has a shape like soccer ball and called
    B
    Graphite is thermodynamically most stable allotrope of carbon.
    C
    Graphite fibres embedded in plastic material from high strength, lightweight composites.
    D
    In diamond each carbon atom undergoes `sp^(3)` hybridisation and is paramagnetic.

  • Diamond and graphite are shown to be allotropic forms of carbon by the fact that

    A
    diamond is hard but graphite is soft
    B
    diamond is transparent while graphics is opaque
    C
    they have different crystal structures
    D
    both from `CO_(2)` when burnt.

  • PASSAGE-I : Diamond and graphite are two allotropic forms of carbon which are crystalline in nature. They differ physically but chemically they are similar. Diamond is the hardest crystalline form of carbon. In diamond each carbon atom is linked to four other carbon atoms by covalent bonds. In graphite, each carbon atom is linked to three other carbon atoms by covalent bond. Graphite is relatively soft and greasy. It is a good conductor or electricity. Which allotrope gives carbon dioxide on heating?

    A
    Graphite
    B
    Diamond
    C
    Coal
    D
    All of these

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    Which of the following is the allotropic form of carbon?

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