Q40 of 312 Page 223

Buckministerfullerence is an allotropic form of the element:

Diamond, graphite and buckministerfullerence are allotropic form of carbon. Buckminsterfullerene was discovered in 1985 containing clusters of 60 carbon atoms joined together to form spherical molecules.

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39 Give one example of a hydrocarbon, other than pentane, having more than three isomers. 39 How many isomers of the following hydrocarbons are possible?

(i) C3H8,


(ii) C4H10,


(iii) C5H12,


(iv) C6H14,

 41 Out of the following pairs of compounds, the unsaturated compounds are: 42 The number of covalent bonds in pentane (molecular formula C5H12) is