Question

$I$. Ionic solids have high melting points.
$II$. Molten ionic solids conduct electricity.

• A. Statement $I$ is true, Statement $II$ is true
• B. Statement $I$ is true, Statement $II$ is false
• C. Statement $I$ is false, Statement $II$ is true
• D. Statement $I$ is false, Statement $II$ is false

Answer 1

Answer: (A)

Statement $I$ is true, Statement $II$ is true

Ionic solids are composed of oppositely charged ions(i.e. positively charged cations and negatively charged anions). There is a strong force of attraction because they are oppositely charged. Hence a lot of energy is required to break them due to which they have high melting point.

In molten state, ions are free to move and hence can conduct electricity. That's why molten ionic solid can conduct electricity.