The electrical conductivity of an ionic solid compound is _____________ (high/low/nil)

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Ionic Compounds**: Ionic compounds are formed by the electrostatic attraction between positively charged ions (cations) and negatively charged ions (anions). A common example is sodium chloride (NaCl), which consists of sodium ions (Na⁺) and chloride ions (Cl⁻).

2. **Structure of Ionic Solids**: In the solid state, ionic compounds are arranged in a rigid lattice structure. The ions are held together by strong electrostatic forces of attraction, which makes the structure very stable.

3. **Electrical Conductivity in Solid State**: For a substance to conduct electricity, it must have charged particles that are free to move. In solid ionic compounds, the ions are fixed in place within the lattice and cannot move freely. Therefore, they do not have free ions or electrons to carry an electric current.

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