Which of the following statements regarding ionic compounds is INCORRECT?

Correct option is B

The correct answer is (b) Ionic compounds in the solid state conduct electricity.

Explanation:

• Ionic compounds generally have high melting points due to the strong electrostatic forces (ionic bonds) between oppositely charged ions, which require a large amount of energy to break.
• Ionic compounds do not conduct electricity in the solid state because the ions are fixed in a rigid lattice and cannot move freely. However, when they are in the molten state or dissolved in water, the ions are free to move and can conduct electricity.
• Many ionic compounds, especially salts, are soluble in water. This is because water molecules surround and separate the ions due to the polar nature of water, which helps in the dissociation of the ionic compound.
• Ionic compounds are typically found in solid form at room temperature because of the strong ionic bonds that hold the ions together in a lattice structure.

Information Booster:

Ionic Bonds: Ionic compounds are formed when atoms transfer electrons from one to another, resulting in the formation of oppositely charged ions. These oppositely charged ions attract each other, forming strong ionic bonds.

Properties of Ionic Compounds:

• Solubility in Water: Many ionic compounds dissolve in water because water molecules can separate the ions from the lattice. However, not all ionic compounds are equally soluble in water. For example, sodium chloride (NaCl) is highly soluble, while compounds like barium sulfate (BaSO₄) are almost insoluble.
• Electrical Conductivity: Ionic compounds can conduct electricity in molten form or when dissolved in water, but not in solid form.
• Brittleness: Ionic compounds tend to be brittle, breaking under stress because the ions in the lattice are shifted and similar charges come into alignment, causing repulsion.

Solid-State Ionic Compounds: While ionic compounds are non-conductive in solid form, their ability to conduct electricity when molten or dissolved is an important property used in electrolysis processes, such as the extraction of metals from ores.