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Đáp án:

1. $CH_2=CH_2+H_2\xrightarrow{{Ni, t^o}} CH_3-CH_3$ 

2. $CH_2=CH_2+Br_2\to CH_2Br-CH_2Br$ 

3. $CH_2=CH-CH_3+HBr\to CH_3-CHBr-CH_3$ (spc) 

4. $CH_2=CH-CH_3+H_2O\xrightarrow{{H^+}}\left[ \begin{array}{l} CH_3-CH(OH)-CH_3\\ CH_3-CH_2-CH_2OH\end{array} \right.$   
5. $3CH_2=CH_2+2KMnO_4+4H_2O\to 3CH_2OH-CH_2OH+2MnO_2+2KOH$