Carbon IV oxide gas does not support combustionburningMagnesium burn to producerelease enough heat energy to decompose Carbon IV oxide gas to carbon and oxygenMagnesium continues to burn in Oxygen forming white Magnesium Oxide solidashBlack speckparticle of carboncharcoal residue forms on the sides of reaction flask During the reaction Carbon IV oxide is reduced Oxidizing agentto carbon while Magnesium is Oxidized to Magnesium Oxide