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Rectified spirit consists of which of the following mixtures?

1. 95% ethyl alcohol and 5% water
2. 94% ethyl alcohol and 4.53% water
3. 94.4% ethyl alcohol and 5.43% water
4. 95.87% ethyl alcohol and 4.13% water

Correct answer: 95% ethyl alcohol and 5% water

Solution

Rectified spirit is the constant-boiling azeotrope of ethanol and water, about 95% ethanol and 5% water by volume (cannot be concentrated further by simple distillation).

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