Q28 of 312 Page 240

What is the difference in the molecular mass of any two adjacent homologues?

The 14 u is the difference in the molecular mass of any two adjacent homologues.

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27 (a) Give the names and structural formulae of the next two higher homologues of methane.

(b) The molecular formula of a hydrocarbon is C2H5. Name its homologues series.


(c) Select the hydrocarbons which are members of the same homologues series. Give the name of each series. C5H10; C3H8; C4H10; C7H12; C8H16

 28 (a) Give the molecular formula of one homologue of each of the following:

(i) C3H6


(ii) C2H6


(iii) C2H2

 28 By how many carbon atoms and hydrogen atoms do any two adjacent homologues differ? 29 Write the formula of the functional group present in carboxylic acids.