Question

Which of the following structures is similar to graphite?
\[
  A.BN \\
  B.B \\
  C.{B_4}C \\
  D.{B_2}{H_6} \\
 \]

Answer 1

Hint: We must remember that the carbon atoms present in graphite are \[\;sp2\] hybridized and are bonded to each other in such a way that 3 out of the 4 valences of carbon gets bonded to another present in the same plane.

Complete step by step answer:
To answer this question we need to understand the basic structure of graphite. Graphite is one of the allotropes of carbon.
The carbon atoms present in graphite are \[\;sp2\] hybridized and are bonded to each other in such a way that 3 out of the 4 valences of carbon gets bonded to another present in the same plane.
This interlinking forms a hexagonal structure in a 2-dimensional plane. In this structure, the bond angle that is formed between the carbon atoms is 120 degrees with a bond length in the plane of 1.421 angstroms.
So the structure that closely resembles that of the graphite will be \[BN\]

Boron nitride also comes in 2 forms namely hexagonal boron nitride and cubic boron nitride. But to keep the discussion short we will discuss the similarities of hexagonal boron nitride and graphite.
\[H - BN\] or \[BN\] structure consists of an alternate arrangement of Boron and Nitrogen atoms in a 2-dimensional plane and in turn, forms a hexagonal ring structure. The N and B atoms are combined by an \[\;sp2\] orbital forming a strong sigma bond.
Due to the formation of hexagonal rings, they share a common structure but with different atoms.
Hence the correct answer will be A. \[BN\]

Note:
We must know that graphite is one of the allotropes of carbon and has the most different properties compared to other allotropes like coal and diamond. Graphite is able to conduct electricity as one of the electrons in each carbon of hexagon is free and roams in the lattice and hence conducts electricity.