Answer:
C. sodium chloride
Explanation:
Boiling point is temperature at which vapor pressure of the liquid becomes equal to external pressure (atmospheric) surrounding liquid.
On basis of bonding, the compound which has the highest boiling point is sodium chloride as it posses ionic bonding which is comprised of strong electrostatic bonds.
Water and alcohol are liquid and also, glucose has covalent bonding.
The melting points are shown below as:
Alcohol - 78.37 °C.
Glucose - 146 °C.
Water - 100°C.
Sodium chloride - 1413 °C.
Answer - C. sodium chloride
