How many 5-membered rings and 6-membered rings are found in steriods?

How many five- membered and six-membered rings are present in C_60 fullerene?

The number of ___ membered rings 20 and ___ membered rings 12 are in buck minster fullerence respectively

The number of ........ membered rings 20 and ... membered rings 12 are in the 'Buckminster fullerene' respectively

In Buckminster fullerene, the number of six membered rings and five membered rings respectively are

How many isomaric dienes with a six-membered ring are possible of the compound with the molecular formula C_(7)H_(10) ?

How many isomaric dienes with a six-membered ring are possible of the compound with the molecular formula C_(7)H_(10) ?

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.

Number of six membered rings present in a steroid nucleus is