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Glass reacts with HF to produce:

1. SiF4
2. H2SiF6
3. H2SiO3
4. Na3AlF6

Correct answer: H2SiF6

Solution

Glass, primarily composed of silica (SiO2), reacts with hydrofluoric acid (HF) to form hexafluorosilicic acid (H2SiF6). This is a well-known reaction in chemistry.

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