(a) Members of a homologous series can be prepared by the same method. Members exhibit the same general chemical reaction. The molecular formula of each member of a homologous series can be derived from a general formula.
(b)(i) Hexane (CH\(_3\)CH\(_2\)CH\(_2\)CH\(_2\)CH\(_2\)CH\(_3\))CH = CH(ethyne)
(c)(i) moles H = \(\frac{7.7}{1.0}\) = 7.7 moles
moles C = \(\frac{92.3}{12}\) = 7.7 moles
i.e \(\frac{7.7}{7.7}\) H ; \(\frac{7.7}{7.7}\) C = 1 : 1
Empirical formula of the hydrocarbon is CH
(CH)x = 78; (13)x = 78;
x = \(\frac{78}{13}\) = 6
Molecular formula is C\(_6\)H\(_6\)
(ii) The molecule is Benzene. The structure is
(d)(i)Y undergoes substitution reaction only.
(ii) x (iii) x H L
(e)(i) Suitable catalyst must be applied when reacted directly with air. In another method, acidified suitable oxidising agent must be applied.
(ii) Oxidation reaction CH\(_3\)CH\(_2\)OH\(_{(g)}\) + CH\(_2\)COOH\(_{(l)}\) +H\(_2\)O\(_{(g)}\)
