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Which consequence results when atmospheric moisture accumulates on sodium chloride?

A)Increased electrical conductivity develops
B)Decreased refractive index is experienced
C)Reduced thermal expansion occurs
D)Crystalline structure becomes more stable

💡 Explanation

Increased conductivity develops because dissolution of NaCl into ions induces electrolytic conduction via mobile ions, rather than electronic. The ionic conductivity rises therefore. It doesn't lead to refractive index changes, thermal expansion or crystal stability.

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