Which one of the following methods is used to prepare carbon monoxide on commercial scale?

Step-by-step solution

(a) When formic acid HCOOH is dehydrated with H ₂ SO ₄ (conc.), it gives carbon monoxide (CO) and H ₂ O as : HCOOH + H ₂ SO ₄ (conc.) CO + H ₂ O + H ₂ SO ₄ But the above process is not used on commercial scale. (b) Direct oxidation of carbon in limited supply of oxygen can give CO but the process is not used on commercial scale. 2 C + O ₂ (limited supply) 2 CO (c) When steam ( H ₂ O ) is passed over coke ( C ) , it gives CO + H ₂ , as : Coke ( C )+ ( Steam) H ₂ O Ni CO (g)+ H ₂(g) The above process can be used to p