The residue of coal decomposition that is used in the manufacture of steel is called coal gascokecoal tar

The correct answer for the question that is being presented above is this one: "coke." The residue of coal decomposition that is used in the manufacture of steel is called coke tar. The coke tar is mostly the waste after the coal decomposition that is used in steel manufacturing.

Its in the national history museum and you can't se the original because its locked away in a vault 

Answer carbon dioxide ice;