Carbon Allotropes

What is the structure of diamond?

• Layered

• Cubic

• Tetrahedral

• Octahedral

Which among the following is not the property of diamond?

• Hardness

• high refractive index

• transparency

• Excellent conductivity

Describe the structure of graphene and state any 2 uses of it.

What are the properties of graphite?

• Excellent insulator

• low melting point

• Can be used in electrodes

• slippery feel

What are fullerenes and mention one of their applications?

• Fullerenes are found in nature and used for food preservation.

• Fullerenes are molecules composed entirely of carbon and used in medicinal field.

• Fullerenes are a type of metal alloy used in electronics.

• Fullerenes are made of silicon and used in construction.

________ is obtained by the destructive distillation of organic material of plants and animals.

Explain the concept of tetravalency in carbon.

• Carbon can form four covalent bonds with other atoms due to having four valence electrons.

• Carbon's tetravalency is a result of having three valence electrons.

• Carbon can only form two covalent bonds due to its atomic structure.

• Tetravalency in carbon refers to its ability to form ionic bonds exclusively.

What is catenation in carbon chemistry?

Differentiate between coal and charcoal.

• Coal is used for cooking, while charcoal is used for industrial purposes.

• Coal is made from animal bones, while charcoal is made from plant material.

• Coal is a natural fossil fuel, while charcoal is obtained by heating wood.

• Coal is a renewable resource, while charcoal is a non-renewable resource.

Lampblack can be used in:

• Black shoe polish

• Carbon papers

• Household fuel

• Manufacture of steel