1)
CH2=CH-CH=CH2+ 2Br2 -> CH2Br-CHBr-CH-CHBr-CH2Br
2)
CH2=CH-CH=CH2+ Br2 -> CH2Br-CH=CH-CH2Br
CH2=CH-CH=CH2 + Br2 -> CH2Br-CHBr-CH=CH2
3)
CH2=CH-CH=CH2+ HCl -> CH3-CHCl-CH=CH2
CH2=CH-CH=CH2+ HCl -> CH3-CH=CH-CH2Cl
CH2=CH-CH=CH2+ HCl -> CH2Cl-CH2-CH=CH2