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Questions and Answers
What is the primary reason for wine to become sour when exposed to air?
What is the primary reason for wine to become sour when exposed to air?
- Oxidation of ethanol to ethanoic acid (correct)
- Presence of sulfites
- Conversion of water to acetic acid
- Fermentation of sugars
What is the composition of rectified spirit commonly used in spirit lamps?
What is the composition of rectified spirit commonly used in spirit lamps?
- 80% ethanol and 20% water
- 100% ethanol
- 90% ethanol and 10% water
- 95.87% ethanol and 4.13% water (correct)
Which compounds are added to commercial alcohol to make it unfit for drinking?
Which compounds are added to commercial alcohol to make it unfit for drinking?
- Sodium chloride and sulfuric acid
- Hydrogen peroxide and acetic acid
- Potassium permanganate and ammonia
- CuSO4 and pyridine (correct)
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