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NDA General Ability General Science 2024 NDA 2024 (Phase 1)

NDA General Ability Question (2024) — Solution

Question

Match List-I with List-II and select the correct answer using the code given below the Lists: array ll array c List-I \\ (Allotrope of Carbon) array & array c List-II \\ (Property) array \\ (a) Graphite & array l (i) Thinnest and strongest \\ material array \\ (b) Diamond & array l (ii) Hardest natural substance array \\ (c) Fullerene & array l (iii) Very light and strong \\ material array \\ (d) Graphene & array l (iv) Soft and slippery material array array

Options

  1. A. array llll (a) & (b) & (c) & (d) \\ (iv) & (ii) & (iii) & (i) array
  2. B. array llll (a) & (b) & (c) & (d) \\ (iv) & (iii) & (ii) & (i) array
  3. C. array llll (a) & (b) & (c) & (d) \\ (i) & (iii) & (ii) & (iv) array
  4. D. array llll (a) & (b) & (c) & (d) \\ (i) & (ii) & (iii) & (iv) array

Answer

A. array llll (a) & (b) & (c) & (d) \\ (iv) & (ii) & (iii) & (i) array

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 ( C _ 60 ), 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.

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