Identify 'Z' in the following sequence of reactions of ethanol
PBrs−−−→Xalc.KOH−−−−−→Yi)conc.H2SO4−−−−−−−−→ii) H2O,ΔZ
CH2 = CH2
CH3CH2OH
CH3CH2 - O - CH2CH3
CH3CH2 - OSO3H
3C2H5OH+PBr3→3C2H5Br+H3PO3 (X)C2H4Br+KOHalc.→C2H4 (Y)C2H4+HHSO4→C2H5−HSO4H2O−−→C2H5OH (Z)