Allotropes of Carbon

Which of the following molecule is called buckminsterfullerene?
${\mathrm{C}}_{90}, {\mathrm{C}}_{60}, {\mathrm{C}}_{70}, {\mathrm{C}}_{120}$

Name the element whose one of the allotropic forms is buckminsterfullerene.

An element E exists in three allotropic forms A, B and C. In allotrope A, the atoms of element E are joined to form spherical molecules. In allotrope B, each atom of element E is surrounded by three other E atoms to form a sheet like structure. In allotrope C, each atom of element E is surrounded by four other E atoms to form a rigid structure.
(a) Name the element E.
(b) What is allotrope A?
(c) What is allotrope B?
(d) What is allotrope C?
(e) Which allotrope is used in making jewellery?
(f) Which allotrope is used in making anode of a dry cell?

The solid element A exhibits the property of catenation. It is also present in the form of a gas B in the air which is utilised by plants in photosynthesis. An allotrope C of this element is used in glass cutters.
(a) What is element A?
(b) What is the gas B?
(c) Name the allotrope C.
(d) State another use of allotrope C (other than in glass cutters).
(e) Name another allotrope of element A which exists as spherical molecules.
(f) Name a yet another allotrope of element A which conducts electricity.

A solid element X has four electrons in the outermost shell of its atom. An allotrope Y of this element is used as a dry lubricant in machinery and also in making pencil leads.
(a) What is element X?
(b) Name the allotrope Y.
(c) State whether allotrope Y is a good conductor or non-conductor of electricity.
(d) Name one use of allotrope Y (other than lubrication and pencil leads)
(e) Name two other allotropes of element X.
 

The number of carbon atoms joined to a spherical molecule of buckminsterfullerene is

One of the following is not an allotrope of carbon. This is:

Buckminsterfullerene is an allotropic form of the element:

Why is graphite used for making dry cell electrodes but diamond is not?

Why is diamond used for making cutting tools (like glass cutters) but graphite is not?

What is buckminsterfullerene? How is it related to diamond and graphite?

Name the three allotropic forms of carbon.

Buckminsterfullerene is a spherical molecule in which 60 carbon atoms are arranged in interlocking hexagonal and pentagonal rings of carbon atoms.
(A) How many hexagons of carbon atoms are present in one molecule of buckminsterfullerene?
(B) How many pentagons of carbon atoms are present in one molecule of buckminsterfullerene ?