1:CH3CHBrCH3 +NaOH----CH3CH=CH2 +NaBr +H2O
2:CH2BrCH2CH2CH3 +NaOH--------H2C=CHCH2CH3 +NaBr +H2O
H2C=CHCH2CH3 +Br2 -------CH2BrCHBrCH2CH3
1:CH3CHBrCH3 +NaOH----CH3CH=CH2 +NaBr +H2O
2:CH2BrCH2CH2CH3 +NaOH--------H2C=CHCH2CH3 +NaBr +H2O
H2C=CHCH2CH3 +Br2 -------CH2BrCHBrCH2CH3