I mean this is like 5 years late but I think I know what question you're on about. I don't think the focus of the question was the hex-3-ene to hexan-3-ol part but rather the equation given . Also if you draw about the product given, there is an alcohol group present on the sulphuric acid bit added and that is attached to the 3rd carbon so probably in that sense it's hexan-3-ol but yeah. If you focus on the equation part of it , it's just a simple electrophilic addition question