(a)(i) Give three characteristics of homologous series. (ii) Name two groups of compounds which form such a series. (b) A saturated organic compound A conta...

(a)(i) Give three characteristics of homologous series.

(ii) Name two groups of compounds which form such a series.

(b) A saturated organic compound A containing two carbon atoms reacted with ethanoic acid in the presence of a mineral acid to form a compound B with a sweet smell. (i) Name the functional group present in A.

(ii) Draw the structure of A.

(iii) Write a chemical equation to show the formation of B.

(iv) Name the compound B.

(c)(i) Write a balanced equation for the reaction between ethyne and excess bromine.

(ii) Give IUPAC name of the product of the reaction in (c)(i)

(iii) State two conditions under which cracking takes place

(d)(i) Outline the preparation of ethanol from starch.

(ii) Give two properties of starch.

(iii) Give a reason why starch does not reduce Fehlings solution

(iv) Describe briefly a chemical test to confirm the presence of starch.