ANSWER
High boiling point
OPTION D
STEP-BY-STEP EXPLANATION:
Firstly, we need to know the meaning of an ionic compound
Ionic compounds: These are compounds that consist of ions held together by an electrostatic force. The compound is always neutral but contains a positively charged ion called the cation and a negatively charged ion called the anion. Ionic compounds have the following properties
• They have a high melting point
,• They have a high boiling point
,• They are usually soluble in water
,• They conduct electricity when dissolved in water or melted
,• They are usually crystalline solid
From the option provided, the only correct answer is; it has a high boiling point