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Absolute alcohol is prepared from rectified spirit by 

(a) fractional distillation 

(b) steam distillation 

(c) azeotropic distillation 

(d) vacuum distillation

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(c) azeotropic distillation 

Absolute alcohol can be prepared from rectified spirit by azeotropic distillation. Absolute alcohol is 100% pure alcohol. Rectified spirit contains 95.87% ethanol and 4.13% water. It is a constant boiling mixture having boiling point 78.13°C.

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