Allotropes of Carbon

The number of six membered and five membered rings in Buckminster Fullerence respectively is

Statement $\mathrm{I}$: Graphite behaves as a lubricant.

Statement $\mathrm{II}$: The layers of carbon atoms in graphite can slip past one over another.

Statement $\mathrm{I}$: Diamond is used as a precious stone.

Statement $\mathrm{II}$: In diamond, carbon atoms are tetrahedrally arranged.

The form of carbon obtained from the incomplete combustion of oil is called as

Fullerene with formula ${\mathrm{C}}_{60}$ has a structure where every carbon atom is;

What are fullerenes? Why are they so called?

If $\mathrm{x}$ pentagonal rings and $\mathrm{y}$ hexagonal Rings are present in fullerene of $\mathrm{z}$ carbon atoms then :-

Thermodynamically the most stable form of carbon is 

_____ is inorganic graphite.

Name the allotropes of carbon.

Which allotrope of carbon is a good conductor of electricity?

Thermodynamically the most stable form of carbon is:

The allotrope of carbon, which is thermodynamically most stable is

Which one of the following is a mismatch?

Define allotropy.

Which of the following material is not a semiconductor.

Which of the following is not a semiconductor?

Which of the following statements is not correct regarding diamond and graphite?

With respect to graphite and diamond, which of the statement (s) given below is (are) correct?

$1.$ Graphite has higher electrical conductivity than diamond

$2.$ Graphite is harder than diamond

$3.$ Graphite has higher C - C bond order than diamond

$4.$ Graphite has higher thermal conductivity than diamond

Which of the following statements are correct?

(i) Fullerenes have dangling bonds

(ii) Fullerenes are cage-like molecules

(iii) Graphite is thermodynamically most stable allotrope of carbon

(iv) Graphite is slippery and hard and therefore used as a dry lubricant in machines