Structure and bonding of carbon

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Question 3
Medium

Carbon and its Structures

This question is about carbon and its various structures.

Carbon nanotubes are a type of fullerene first discovered after buckminsterfullerene.

a.

What shape is a carbon nanotube?

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b.

Give one use of carbon nanotubes.

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c.

Ethene is a compound of carbon and hydrogen.

Below is a representation of the dot-and-cross diagram of an ethene molecule:

A dot-and-cross diagram showing two central carbon (C) atoms overlapping. The overlapping region contains four shared electrons (two crosses and two dots). Each carbon atom also overlaps with two hydrogen (H) atoms on its outer side. Each of these four C-H overlapping regions contains two shared electrons (one dot and one cross).

Complete the displayed formula of ethene by drawing single bonds (lines) to represent the four single covalent bonds around the carbon atoms:

HH \text{H}\quad\quad\text{H} HH C=C \text{C}=\text{C} C=C HH \text{H}\quad\quad\text{H} HH
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d.

Determine the molecular formula of ethene.

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e.

Ethene is a gas at room temperature and has a low boiling point. Why does ethene have a low boiling point?

Select one option:

  • The covalent bonds are strong.
  • The covalent bonds are weak.
  • The intermolecular forces are strong.
  • The intermolecular forces are weak.
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f.

Graphene is a single layer of graphite.

Explain why graphene:

  • is a good electrical conductor,
  • has a very high melting point.

You should answer in terms of structure and bonding.

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Structure and bonding of carbon Questions

  1. GCSE
  2. /Chemistry
  3. /Structure and bonding of carbon