CUET Preparation Today
Which of the following is not a characteristic of fullerenes? |
Of all the fullerene, the C60 allotrope is the most stable. Its shape is similar to that of a soccer ball. It contains only fused six-membered carbon-carbon rings. Its hardness is lower than that of a diamond. |
It contains only fused six-membered carbon-carbon rings. |
The correct answer is option 3. It contains only fused six-membered carbon-carbon rings. The characteristic that is not true of fullerenes is: It contains only fused six-membered carbon-carbon rings. Fullerenes can contain fused rings of various sizes, including five-membered (pentagonal) and six-membered (hexagonal) carbon-carbon rings. While the most common fullerene, C60 (buckminsterfullerene), is composed entirely of fused hexagonal rings, other fullerenes may have a mix of pentagonal and hexagonal rings, or even other sizes. Therefore, the statement that fullerenes contain only fused six-membered carbon-carbon rings is not accurate. |
