An organic compound on treatment with `Br_(2)//C Cl_(4)`, gives a bromoderivative alkene. The compound will be

Cyclohexane when treated with Br_(2) in C Cl_(4) gives

Acetylene with excess of Br_(2)//C Cl_(4) gives

An organic compound on treatment with conc. Sulphuric acid, gives an intermediate compound, which on further hydrolysis gives isopropanol. The organic compound is __________ and the process is called _____