Question

On the basis of bonding, which of the following is true about potassium chloride when compared to sucrose?

(Points : 3)
Potassium chloride has a higher boiling point than sucrose.

Potassium chloride dissolves in water, but sucrose does not.

Potassium chloride has a lower melting point than sucrose.

Potassium chloride crystals are softer than sucrose crystals.

Answer 1

Answer: Potassium chloride dissolves in water, but sucrose does not

Explanation:

Potassium chloride is an ionic compound whereas sucrose is a covalent compound. And ionic compounds being polar ,easily dissolve in polar solvents such as water whereas covalent compounds being non polar dissolve only in nonpolar solvents.

Ionic compounds are held together by strong electrostatic forces and thus have high melting and boiling points. Ionic compounds are arranged in crystal lattice and are hard.

Answer 2

Ionic bonding is present for potassium chloride. Two opposite ions attract and for a bond called the ionic bond. On the other, sucrose has a covalent bonding where electrons are shared between atoms. Between this two bonds, ionic is the much stronger bond therefore the correct answer is the first option. Potassium chloride has a higher boiling point than sucrose.