Mg(0H)2 as there is ionic between Mg & OH and covalent between O and H in OH and same with K2C03 ionic between K and C03 and covalent between C and 0 Solution Mg(0H)2 as there is ionic between Mg & OH and covalent between O and H in OH and same with K2C03 ionic between K and C03 and covalent between C and 0.