Give the IUPAC name for:

A compound X [having vinegar like smell] when treated with ethanol in the presence of the acid Z, gives a compound Y which has fruity smell. The reaction is $\text{C}$2\text{H}5\text{OH} + \text{X} \xrightarrow{\text{Z}} \text{Y} + \text{H}_2\text{O}

(i) Identify Y and Z

(ii) Write the structural formula of X.

(iii) Name the above reaction

Write the structural formula of the two isomers of butane.

Give the :

(i) IUPAC name of the homologous series.

(ii) Characteristic bond type.

(iii) IUPAC name of the first member of the series - in each case i.e., (a) and (b) relating to the homologous series of hydrocarbons - whose general formula is (a) C_nH_2n-2 (b) C_nH_2n+2