Statement 1: AlCl3 forms dimer Al2Cl6 in gaseous state but it dissolves in H2O forming AlH2O63+ and 3Cl− ions.Statement 2: Aqueous solution of AlCl3 is acidic due to hydrolysis.

Statement 1: In gaseous phase and in non-polar solvent like benzene AlCl3 exists as dimer, Al2Cl6.  High enthalpy of hydration in water breaks the covalent dimer forming AlH2O63+ and 3Cl−.Statement 2: AlCl3 + 3H2O →   AlOH3 +  3HCl