Question

_____ oxide is formed when formic acid reacts with concentrated sulphuric acid

Answer 1

Explanation:
When formic acid(HCOOH) is reacting with concentrated Sulphuric(H₂SO₄) acid, the formic acid will be dehydrated and sulphuric acid becomes a hydrated acid by accepting one water molecule along with carbon monoxide. The reaction is shown below:
${\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)+\mathrm{HCOOH}\left(\mathrm{aq}\right)\to \mathrm{CO}\left(\mathrm{g}\right)+{\mathrm{H}}_2{\mathrm{SO}}_4.{\mathrm{H}}_2\mathrm{O}\left(\mathrm{aq}\right)$

Thus, carbon monoxide is formed when formic acid reacts with concentrated sulphuric acid.