Which of the following is the molecular formula of benzene?

C₆H₆, C₆H₁₀, C₆H₁₂, C₆H₁₄,

27 Give the molecular formula of butane and mention the names of its two isomers. Name one fuel which contains both these isomers. 28 Give IUPAC names and formulae of an organic compound containing single bonds and the other containing both a triple bond. 28 Which of the two has a branches chain: isobutene or normal butane? 29 Catenation is the ability of an atom to form bonds with other atoms of the same element. It is exhibited by both carbon and silicon. Compare the ability of catenation of the two elements. Give reasons.