Answer: Ag+ ions move into interstitial positions via Frenkel defect, allowing ion migration.
- A Ag+ ions move into interstitial positions via Frenkel defect, allowing ion migration
- B AgCl is said to largely melt at this temperature, releasing free-moving ions in routine practice
- C Schottky defects are said to form instead and conduct via free electrons overall
- D Rising temperature is said to directly lower the lattice energy of the solid in most cases
Correct answer: A. Ag+ ions move into interstitial positions via Frenkel defect, allowing ion migration
Explanation: At higher temperatures, more Ag⁺ ions move into interstitial positions (Frenkel defect); the increased number of mobile interstitial Ag⁺ ions raises ionic conductance.
The three cubic unit cells: Simple Cubic has atoms only at corners; Body-Centred adds one atom at the centre; Face-Centred adds one atom at the centre of each of the 6 faces, giving the highest packing efficiency.
Concept context
Explore the ordered world of crystalline solids: unit cells, packing, defects, and how structure determines electrical and magnetic properties.