Question

Separate layers of covalent bonds are present in:

• A. Boron carbide
• B. Graphite
• C. Cadmium sulphide
• D. Aluminium nitride

Answer 1

The correct option is B Graphite

Diamond is a metastable allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Graphite is a crystalline form of carbon and one of the allotropes of carbon. Graphite is the most stable form of carbon under standard conditions. It has a layered, planar structure. The individual layers are called graphene. In each layer, the carbon atoms are arranged in a honeycomb lattice with separation of $0.142nm,$ and the distance between planes is $0.335nm.$ Correct answer is option-B.