Составить уравнения реакции ch4=> c+h2

CH4 -> CH3Br -> C2H6 -> C2H4 -> C2H2 -> C6H6 
CH4+Br2[свет] -> CH3Br+HBr 
2CH3Br +2Na-> C2H6 +2NaBr 
C2H6 [Al2O3]-> C2H4+H2 
C2H4 [Al2O3]-> C2H2 +H2 
2C2H2[C,t ] -> C6H6