Which of the following statements is INCORRECT?
In fullerene (C60) total number of bonds( sigma and pi) is 90
Fullerene is purest form among allotropes of carbon
Diamond is purest form among allotropes of carbon
In fullerene (C60) "20" six membered rings and "12" five membered rings are present

Assertion : Fullerenes are the only pure form of carbon. Reason : It contains twenty, five membered rings and twelve, six membered rings.

In buck minster fullerene (C_(60)) the number of six numbered and five membered rings "x" and "y" respectively,then "x-y" is

Assertion (A) : C_(60) fullerence is an allotrope if carbon. Reason (R) :In C_(60) fullerene , five -menmebrd rings are isolated forem each other .

Following statements are given about fullerenes. Find the number of correct statements : (a) Fullerenes are made by the heating of graphite in an electric arc in the presence of inert gases such as helium or argon. (b) fullerenes are the purest form of cabon because they have smooth structure, having dangling bonds. (c) C_(8o) fullerenes have 12, five membered rings and 30-six membered rings. (d) Fullerenes have aromatic character. (e) In C_(60) fullerences six membered ring is fused with six of five but a five membered ring can only use fuse with six membered rings.

C_(60) (fullerene) has the shape of a soccer ball, consider the following statements : I. Fullerene is an allotrope of carbon II. Fullerence has 5 and 6 membered rings III. All carbons in fullerene are sp^(2) hybridised. Identify the correct statements :

How many of the following statements are correct regarding allotropes of carbon: (a) Graphite is not a good conductor of electicity in perpendicular direction of layers at ordinary temperatures. (b) Coke is the impure form of carbon. ( c) Anthracite is the purest form of carbon. (d) Buckminister fullerence contains 12 five membered rings and 20 six-membered rings. (e) Diamond is a good conductor of heat. (f) Graphite is diamagnetic in nature. (g) Graphite is thermodynamically more stable than diamond

If x is the number of C-C sigma bonds in C_(60) (fullerene) and y is number of pentagonal rings in C_(60) then final out the value of (x+y) .