Diamond vs Graphite Quiz

What type of bond is found in both diamond and graphite?

• Ionic

• Covalent

• Metallic

• Hydrogen

Answer explanation

Both diamond and graphite have a covalent bond, where atoms share electrons to form strong bonds.

Which property is unique to diamond when compared to graphite?

• Electrical conductivity

• High melting point

• Ability to conduct heat

• Hardness

Answer explanation

Diamond is unique compared to graphite due to its hardness, which is a distinguishing property between the two forms of carbon.

Graphite is a good conductor of electricity due to the presence of:

• Free ions

• Delocalized electrons

• Covalent bonds

• Ionic bonds

Answer explanation

Graphite is a good conductor of electricity due to the presence of delocalized electrons, which can move freely throughout the material allowing for the flow of electric current.

Which allotrope of carbon is used as a lubricant?

• Diamond

• Graphite

• Buckminsterfullerene

• Carbon nanotubes

Answer explanation

Graphite is the allotrope of carbon used as a lubricant due to its slippery layers that easily slide over each other.

Diamond and graphite are both allotropes of carbon. What does this mean?

• They are made of different elements.

• They have different numbers of protons.

• They have the same chemical composition but different physical forms.

• They are both pure elements.

Answer explanation

Diamond and graphite are both allotropes of carbon, meaning they have the same chemical composition but different physical forms.

Why does diamond have a high melting point?

• Because of its ionic bonds

• Because of its metallic bonds

• Because of its strong covalent bonds

• Because of its hydrogen bonds

Answer explanation

Diamond has a high melting point due to its strong covalent bonds.

Which of the following is true about the structure of graphite?

• It consists of layers that are free to slide over each other.

• It has a tetrahedral structure.

• It is composed of hexagonal rings in a 3D network.

• It has a cubic structure.

Answer explanation

The correct choice is that graphite consists of layers that are free to slide over each other, allowing it to have unique properties.

What makes diamond the hardest natural substance?

• Its molecular structure

• Its tetrahedral arrangement of carbon atoms

• Its ionic bonds

• Its layered structure

Answer explanation

Diamond is the hardest natural substance due to its tetrahedral arrangement of carbon atoms, which creates strong covalent bonds.

Graphite can be used as electrodes in electrolysis because:

• It is a good conductor of heat.

• It does not react with electrolytes.

• It is a good conductor of electricity.

• Both B and C are correct.

Answer explanation

Graphite is a good conductor of electricity and does not react with electrolytes, making it suitable for use as electrodes in electrolysis. Therefore, both options B and C are correct.

Which of the following statements is false?

• Diamond is an excellent thermal conductor.

• Graphite is opaque and black.

• Diamond is an excellent electrical conductor.

• Graphite is soft and slippery.

Answer explanation

The statement 'Diamond is an excellent electrical conductor' is false because diamond is actually an insulator when it comes to electricity.