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Glacial acetic acid gets its name because pure ethanoic acid does what at around 17 degrees C?
ATurns into a blue dye
BDecomposes into carbon dioxide
CBoils into a colourless vapour
DFreezes into an ice-like solid
Answer & Solution
Correct answer: D. Freezes into an ice-like solid
1. The melting point of pure ethanoic acid is 17 degrees C.
2. In cold countries the room temperature can fall to this value.
3. The acid then freezes and looks like ice.
4. Because of this ice-like appearance it is named glacial acetic acid.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 9 "Carbon Compounds", p.137_
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