This set of Applied Chemistry Multiple Choice Questions & Answers (MCQs) focuses on “Fullerenes and their Properties – 1”.
1. A fullerene is any molecule composed entirely of the carbon not in the form of hollow ________
a) Sphere
b) Tube
c) Ellipsoid
d) Cuboid
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Explanation: A fullerene is any molecule composed entirely of carbon not in the form of cuboid. Generally, the fullerenes are in the form of spherical, ellipsoid or tube.
2. Spherical fullerenes are otherwise called as ________
a) Bucky balls
b) Soccer balls
c) Cricket balls
d) Tennis balls
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Explanation: Spherical fullerenes are otherwise called as the bucky balls. They resemble to the balls used in soccer. They are similar in structure to graphite.
3. The fullerenes are composed with _________
a) Graphene sheets
b) Graphite
c) Lead
d) Other carbon materials
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Explanation: The fullerenes are composed with stalked graphene sheets. The fullerenes are similar to the structure of graphite. The only difference is they can be n sphere, tube or ellipsoid but graphene is layers.
4. In fullerenes, the graphene sheets are linked with ________
a) Hexagonal rings
b) Octagonal rings
c) Trigonal rings
d) Decagonal rings
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Explanation: The fullerenes are composed with the stalked graphite sheets that are linked with the hexagonal ring. They may also be linked with the pentagonal and heptagonal rings sometimes.
5. The first molecule was prepared in ___________
a) 1988
b) 1985
c) 1996
d) 1982
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Explanation: The first molecule was prepared in 1985 by Richard Smalley etal at rice university, USA. They were awarded with noble prize in 1996. The name fullerene is given as homage to buckminister fullerene.
6. The smallest bucky ball cluster is _________
a) C6
b) C8
c) C10
d) C20
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Explanation: The smallest bucky ball cluster is C20. It is the unsaturated version of the dodecahedrane. The most common bucky ball is the C60.
7. Hollow tubes of very small dimensions are called as _____________
a) Mega tubes
b) Carbon nano tubes
c) Bucky ball clusters
d) Polymers
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Explanation: Hallow tubes of very small dimensions are called the carbon nano tubes having single or multiple walls. Potential applications are in electronic industry.
8. The fullerenes that are larger in diameter than nano tubes and having walls of different thickness are ____________
a) Mega tubes
b) Carbon nano tubes
c) Bucky ball clusters
d) Polymers
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Explanation: The fullerenes that are larger in diameter than the nano tube and having walls of different thickness are mega tubes. They are having different sizes.
9. Mega tubes are used for __________
a) Transport
b) Chemical industries
c) Laboratories
d) Preparation of compounds
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Explanation: Mega tubes are used for the transport potentially. They are a variety of molecules of different sizes. They are larger than the nano tubes.
10. The chain, two dimensional and three dimensional polymers are formed under ______
a) Vacuum
b) High pressure
c) Low pressure
d) No pressure
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Explanation: The chain, two dimensional and three dimensional polymers are formed under high pressure. The high temperature is also maintained to form the polymers.
11. Spherical particles based on the multiple layers surrounding a buck ball core is called ___________
a) Nano onions
b) Nano particles
c) Nano clusters
d) Nano materials
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Explanation: Spherical particles based on the multiple layers surrounding a buck ball core are called nano onions. These are proposed mostly for lubricants.
12. The buckminister fullerene is naturally occurring element found in ________
a) Earth
b) Soot
c) Smoke
d) Fog
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Explanation: Buckminister fullerene is the smallest fullerene molecule containing pentagonal and hexagonal rings. They are natural elements and found first in soot.
13. The structure of C60 is called as _______
a) Isohedron
b) Truncated isohedron
c) Trigonal
d) Trigonal bipyramidal
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Explanation: The structure of C60 is called as truncated isohedron. This resembles a foot ball structure. It consists of pentagons and hexagons linkage.
14. The vander-waals diameter of C60 is ________
a) 1.1nm
b) 1.2nm
c) 1.3nm
d) 1.4nm
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Explanation: The vander-waals diameter of C60 is 1.1nm. There are twenty hexagons and twelve pentagons in the structure of the buckminister fullerene.
15. The bond length of the C60 is ________
a) 1.1 Ao
b) 1.2 Ao
c) 1.3 Ao
d) 1.4 Ao
View Answer
Explanation: The bond length of the buckminister fullerene is about 1.4 Ao. The silicon bucky balls are created around the metal ions.
Sanfoundry Global Education & Learning Series – Applied Chemistry.
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