Question

Which one of the following is a good conductor of electricity?
A.Diamond
B.Graphite
C.Silicon
D.Amorphous carbon

Answer 1

Hint: We need to remember that if the material passes heat, electricity, or sound etc through it, that type of material is known as a conductor. If the material passes the electricity, then that material is known as the conductor of electricity. For example, plasma is an example of a conductor of electricity. Most of the metals act as good conductors of electricity. But the non- metals are poor conductors of electricity.

Complete answer:
We need to remember that the diamond is the solid form of the carbon having crystal structure. The diamond will not conduct the electricity. Because, the covalently bonded carbon atom in diamonds is arranged in tetrahedral manner. Hence, option (A) is incorrect.
The graphite is the crystalline form of carbon element. And it is the allotropes of carbon. Here, the atoms are arranged in the form of hexagonal structure. And at standard condition, it is the most stable form of carbon compounds.
Graphite is a good conductor of electricity. Because here the electrons are loosely attacked the carbon atoms are held with very weak Van Der Waals forces of attraction. Hence, option (B) is correct.
Silicon is a semiconductor and it will not conduct the electricity. But when the temperature, sometimes it acts as a conductor. Hence, option (C) is incorrect.
The amorphous carbon does not act as a good conductor of electricity. Hence, the option (D) is incorrect.

Note:
We need to know that the conductors are mainly divided into three types according to their conductivity: conductor, semi- conductor and insulator. The conductors are high conductivity in nature. Because, all the atoms are closely packed. And insulators will not conduct the electricity. Because it requires a high amount of energy for the excitation of electrons.