a) Không thấy phản ứng số (4) nên mik sửa một chút nhé!
\(\left(1\right)C_2H_4+H_2\xrightarrow[H^+]{axit}C_2H_5OH\\ \left(2\right)C_2H_5OH+O_2\underrightarrow{\text{men giấm}}CH_3COOH+H_2O\\ \left(3\right)2CH_3COOH+Zn\rightarrow\left(CH_3COO\right)_2Zn+H_2\uparrow\)
\(\left(4\right)C_2H_5OH+CH_3COOH\xrightarrow[t^o]{H_2SO_{4\left(đặc\right)}}CH_3COOC_2H_5+H_2O\\ \left(5\right)CH_3COOC_2H_5+NaOH\rightarrow CH_3COONa+C_2H_5OH\\ \left(6\right)CH_3COONa+NaOH\rightarrow Na_2CO_3+CH_4\uparrow\\ \left(7\right)2CH_4\xrightarrow[\text{làm lạnh nhanh}]{t^o}C_2H_2\uparrow+3H_2\uparrow\)
b)
\(\left(1\right)C_2H_5OH\xrightarrow[axit]{t^o}C_2H_4\uparrow+H_2O\\ \left(2\right)C_2H_4+HCl\rightarrow C_2H_5Cl\\ \left(3\right)C_2H_5Cl+NaOH\rightarrow C_2H_5OH+NaCl\\ \left(4\right)C_2H_5OH+Na\rightarrow C_2H_5ONa+\dfrac{1}{2}H_2\uparrow\)
c)
\(\left(1\right)CH_3COONa+NaOH\rightarrow Na_2CO_3+CH_4\uparrow\\ \left(2\right)2CH_4\xrightarrow[\text{làm lạnh nhanh}]{t^o}C_2H_2\uparrow+3H_2\uparrow\\ \left(3\right)C_2H_2+H_2\xrightarrow[t^o]{Pd\text{/}PdCO_3}C_2H_4\\ \left(4\right)C_2H_4+H_2O\xrightarrow[axit]{t^o}C_2H_5OH\\ \left(5\right)C_2H_5OH+3O_2\underrightarrow{t^o}2CO_2+3H_2O\)
d)
\(\left(1\right)CH_4\xrightarrow[\text{làm lạnh nhanh}]{t^o}C_2H_2\uparrow+3H_2\uparrow\\ \left(2\right)C_2H_2+H_2\xrightarrow[Pd\text{/}PdCO_3]{t^o}C_2H_4\\ \left(3\right)C_2H_4+H_2\xrightarrow[t^o]{Ni}C_2H_6\\ \left(4\right)C_2H_6+Cl_2\underrightarrow{a\text{/}s}C_2H_5Cl+HCl\\ \left(5\right)CH_4+Cl_2\underrightarrow{a\text{/}s}CH_3Cl+HCl\\ \left(6\right)C_2H_2+2Br_2\rightarrow C_2H_2Br_4\\ \left(7\right)C_2H_4+Br_2\rightarrow C_2H_4Br_2\)