\(a,\)
\(CH_2COOHNa+NaOH\underrightarrow{^{to,CaO}}CH_4+Na_2CO_3\)
\(CH_4+Cl_2\underrightarrow{^{askt}}CH_3Cl+HCl\)
\(CH_3Cl+Cl_2\underrightarrow{^{to}}CH_2Cl_2+HCl\)
\(CH_2Cl_2+Cl_2\underrightarrow{^{askt}}CHCL_3+HCl\)
\(CH_3Cl_2+Cl_2\underrightarrow{^{askt}}CCl_4+HCl\)
\(b,\)
\(Al_4Cl_3+12HCl\rightarrow4AlCl_3+3CH_4\)
\(CH_4+2O_2\underrightarrow{^{to}}CO_2+2H_2O\)