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← ScienceWhich consequence results when exposed titanium dioxide degrades paint?
A)Chalking from photocatalytic oxidation occurs✓
B)Ionic bond hydrolysis weakens paint
C)Van der Waals forces intensify cracking
D)Hydrogen bond crosslinking prevents deformation
💡 Explanation
Chalking happens because UV light causes electron-hole pairs in the titanium dioxide pigment; the photocatalytic oxidation mechanism then decomposes the organic binder. This causes pigments become loosely bound and release, therefore resulting in chalking rather than the other options that involve different degradation and forces.
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