Which chemical compound is used for the etching of glass?
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Sodium bicarbonate
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Carbon monoxide
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Hydrofluoric acid
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Nitric acid
C
Correct answer
Explanation
Hydrofluoric acid is unique in its ability to dissolve silica (SiO2), which is the main component of glass. This chemical reaction makes HF extremely hazardous to work with but indispensable for glass etching and frosting applications.