(d) As all the com pounds have same concentration, i.e. 0.1 M. Thus, the compound that will break into the most parts has highest boiling point. Glucose (1 part, covalent; does not ionise) Sodium chloride (1 Na, 1 Cl; ionises) Calcium chloride (1 Ca, 2Cl; ionises) Ferric chloride (1 Fe, 3Cl; ionises)