Heating methanoic acid with concentrated H ₂ SO ₄ produces:

Step-by-step solution

Methanoic acid (formic acid, HCOOH ) when heated with concentrated H ₂ SO ₄ undergoes dehydration. Concentrated H ₂ SO ₄ acts as a strong dehydrating agent and removes a molecule of water from methanoic acid. The chemical reaction is given by: HCOOH conc. H ₂ SO ₄, CO + H ₂ O Thus, carbon monoxide ( CO ) gas is produced. Answer: CO