Classify the following compounds as primary, secondary and tertiary hatides.

1.   1-bromobut-2-ene
2.   4-bromopent-2-ene 
3.  2-bromo-2-methylpropane


The structural formula of the given compounds are

H3CH2C=HCH2CBe            (b) H3CHCH=CHCH3
                  l-Bromo but -2 ene                             |
                        (Primary halide)_                            4- Bromo but -2-ene
                   CH3                                                             (Secondary halide) 
                    |
(c) H3CCCH3
                    |
                    Br