Isopropyl bromide was treated separately with sodium tertiary butoxide and sodium ethoxide under two different conditions.
Reaction I : Treatment of isopropyl bromide with sodium tertiary butoxide at 40°C gave almost exclusively compound A (C₃H₆).
Reaction - II : Treatment of isopropyl bromide with sodium ethoxide at 30°C yielded compound (A) along with small amount of an ether B (C₅H₁₂O)
Compound A was readily oxidized by a neutral solution of cold  dilute potassium permanganate to give a brown precipitate