Multiple choice Sorel's cement is formed by MgCl2.5MgO.xH2O Mg(OH)2 MgCO3 CaSO4.1/2H2O None of these Reveal answer Fill a bubble to check yourself A Correct answer Explanation When the saturated solution of magnesium chloride is made to react with magnesium oxide, the resulting paste is a hard marble like mass forming MgCl2.5MgO.xH2O. Hence, this option is correct.