1. A Hydrocarbon contains 7.7% by mass of hydrogen and 92.3% by mass of carbon. The relative molar mass of the compound is 78. (I) Derive the empirical formula of the compound and hence it's molecular formula (ii) Name the hydrocarbon and write it's structural formula (H=1;C=12) 2.What is a functional group? 3.Name the functional group present in the following HOMOLOGOUS series (I) Alkanols (ii) Alkanoic acid 4.State 3 characteristics of HOMOLOGOUS series.