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← ScienceWhich consequence results when molten NaCl solidifies unevenly?
A)Increased point defect concentrations appear✓
B)Covalent bond character becomes dominant
C)Grain boundary diffusion decreases sharply
D)Electron mobility increases significantly
💡 Explanation
Undirected cooling induces localized stress. Cation/anion vacancies increase via Frenkel Defect formation because minimized lattice energy drives point defect equilibrium to accommodate strain; therefore the concentration changes, rather than altered bonding or grain effects.
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