Correct Answer: Hydrofluoric Acid (HF)
Subject: chemistry
Explanation: • <b>Key Fact</b> Glass dissolves in Hydrofluoric acid (HF), which is why HF is never stored in glass containers. • <b>Supporting Detail</b> HF is uniquely capable of reacting with the silica (SiO₂) present in glass. • <b>Related Concept</b> Due to this property, Hydrofluoric acid is primarily used for glass etching. • <b>Why wrong options are wrong</b> Common strong acids like HCl, HNO₃, and H₂SO₄ do not dissolve glass. • <b>Exam Trick</b> Memory Trick: 'HF' = Hates Flint (Flint is a type of glass). • <b>Additional Info</b> Solid glass is also referred to chemically as a "Supercooled liquid".
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