Properties and Structures of Carbon

The video tutorial explores the allotropes of carbon, a non-metallic element essential to life. Carbon exists in crystalline and amorphous forms, known as allotropes, with diamond, graphite, and fullerene being the primary crystalline forms. Diamond is the hardest form, with a rigid structure and poor electrical conductivity. Graphite, with its layered structure, is a good conductor of electricity and less hard than diamond. Fullerene, resembling a soccer ball, consists of carbon atoms in a unique arrangement. The video concludes with a summary of these forms and their properties.

Which element is essential in all life forms and is abundantly found in the Earth's crust?

• Hydrogen

• Carbon

• Oxygen

• Nitrogen

What is the atomic number of carbon?

• 4

• 6

• 8

• 10

What are the two main forms in which carbon exists?

• Metallic and Non-metallic

• Gas and Plasma

• Crystalline and Amorphous

• Solid and Liquid

Which of the following is a property of diamond?

• Low melting point

• Soft and greasy

• Good conductor of electricity

• Hardest form of carbon

What is the bond length between carbon atoms in diamond?

• 142 pm

• 154 pm

• 338.3 pm

• 145.3 pm

Why is graphite a good conductor of electricity?

• It has free electrons

• It has a high density

• It has a rigid structure

• It is a metal

What is the bond length between carbon atoms in graphite?

• 338.3 pm

• 145.3 pm

• 142 pm

• 154 pm

What is the unique shape of fullerene often compared to?

• A cylinder

• A pyramid

• A cube

• A soccer ball

How many five-membered rings are present in fullerene?

• 16

• 14

• 12

• 10

What is the bond length of a single bond in fullerene?

• 154 pm

• 142 pm

• 338.3 pm

• 145.3 pm