1.
A substance C4H10O\text{C}_4\text{H}_{10}\text{O} yields on oxidation a compound C4H8O\text{C}_4\text{H}_8\text{O} which gives an oxime and a positive iodoform test. The original substance on treatment with conc. H2SO4\text{H}_2\text{SO}_4 gives C4H8\text{C}_4\text{H}_8. The structure of the compound is: