Question

Assertion (A): NaCl is a good conductor of electricity in solid state.

Reason (R): In the solid-state Na⁺ and Cl⁻ ions are free.

Options

• If both A and R are true, and R is the correct explanation of A.

• If both A and R are true, but R is not the correct explanation of A.

• If A is true, but R is false.

• If both A and R are false.

Answer 1

If both A and R are false.

Explanation:

Solid NaCl cannot conduct electricity because its Na⁺ and Cl⁻ ions are tightly held in a rigid crystal lattice by strong electrostatic forces, meaning they are not free to move. NaCl only becomes conductive when melted or dissolved in water, as these processes break the lattice and allow the ions to move freely toward electrodes.