Câu 2:
1. \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)
2. \(C_2H_4+H_2\underrightarrow{t^o,Ni}C_2H_6\)
3. \(CH_3-CH=CH_2+Br_2\rightarrow CH_3-CHBr-CH_2Br\)
4. \(CH_2=CH_2+HCl\rightarrow CH_3-CH_2Cl\)
5. \(CH_4+Cl_2\underrightarrow{as}CH_3Cl+HCl\)
Đúng 2
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