$\mathrm{C}_{60}$, an allotrope of carbon contains:

(A) 20 hexagons and 12 pentagons.

(B) 12 hexagons and 20 pentagons.

(C) 18 hexagons and 14 pentagons.

(D) 16 hexagons and 16 pentagons

JEE Main · 2019 · 09 Apr 2019 · Shift 1 · p-Block Elements

C_{60}

, an allotrope of carbon contains:

(A)20 hexagons and 12 pentagons.✓ Correct
(B)12 hexagons and 20 pentagons.
(C)18 hexagons and 14 pentagons.
(D)16 hexagons and 16 pentagons

Answer: (A)

Solution

C X_{60}

is built like a football, a truncated icosahedron. It carries twelve pentagonal faces, which put in the curvature that closes the cage, stitched together by twenty hexagonal faces: twenty hexagons and twelve pentagons.

JEE Main · 2019 · 09 Apr 2019 · Shift 1 · Single correct option

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