NDA 2024
- Exam
- NDA
- Year
- 2024
- Subject
- General Ability
- Chapter
- General Science
NDA 2024 · General Ability · General Science
Match List-I with List-II and select the correct answer using the...
Match List-I with List-II and select the correct answer using the code given below the Lists:
| List-I (Allotrope of Carbon) | List-II (Property) |
| (a) Graphite | (i) Thinnest and strongest material |
| (b) Diamond | (ii) Hardest natural substance |
| (c) Fullerene | (iii) Very light and strong material |
| (d) Graphene | (iv) Soft and slippery material |
Options
- A
- B
- C
- D
Correct answer
A.
Step-by-step solution
(a) Graphite (iv) Soft and slippery material: Graphite is composed of layers of carbon atoms arranged in a hexagonal lattice. These layers are weakly bonded together, allowing them to slide over each other easily. This gives graphite its characteristic soft and slippery feel, making it suitable as a lubricant and in pencils.
(b) Diamond (ii) Hardest natural substance: Diamond is made up of carbon atoms arranged in a tetrahedral lattice structure, forming a very strong covalent bond network. This structure gives diamond its exceptional hardness, making it the hardest natural substance known.
(c) Fullerene (iii) Very light and strong material: Fullerene molecules, such as Buckminsterfullerene , are spherical carbon molecules with a unique structure. They are lightweight due to their hollow structure and have remarkable strength, despite their lightness.
(d) Graphene (i) Thinnest and strongest material: Graphene is a single layer of carbon atoms arranged in a two-dimensional honeycomb lattice. It is incredibly thin, with a thickness of just one atom. Despite its thinness, graphene is exceptionally strong, with a tensile strength much higher than steel.