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which complete ring is formed by carbon atoms only.


               Subjective-
             S.L                                   Questions                                    Mark     Skill
             No.
             Q.1                                                                                1        R
                    Write the molecular formula of 2nd and the 3rd member of
                    homologous series whose first member is methane.[CBSE 2017]

             Q.2      Write the next homologue of each of the following:                        1        u
                         a.   C 2H 4
                         b.   C 4H 6[CBSE 2016]

             Q.3    How do the melting and boiling points   of   the hydrocarbons               3        R+A
                    change with increase in molecular mass?[CBSE 2012]


             Q.4    C 3H 6, C 4H 8 and C 5H 10 belong to same 1 homologousseries.               3        U+A
                       a.   Define homologous series.
                       b.Why  the  melting  and  boiling  point  of  C 5H 10  is
                           higher than C 4H 3?
                       c.  Arrange  these  hydrocarbons  in  order  of  increasing
                           boiling points.[CBSE 2016]

             Q.5                                                                                5        HOT
                    Why     are     certain    compounds         called    hydrocarbons?
                    Write    the     general     formula     for    homologous        series
                    ofalkanes,alkenes and alkynes and also draw thestructure of
                    the first member of each series.[CBSE 2017]




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