CnH2n−2+2H2→200−300oCNi or Pb or PtCnH2n+2CnH2n+H2→200−300oCNi or Pb or PtCnH2n+2These reactions are called

CnH2n−2+2H2→200−300oCNi or Pb or PtCnH2n+2CnH2n+H2→200−300oCNi or Pb or PtCnH2n+2These reactions are called Hydrogenation ,Catalytic reduction and Sabatier -Senderens reactions.