Absolute alcohol is prepared from rectified spirit by :

steam distillation

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fractional distillation

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distillation with CaO and Ca

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simple distillation

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Solution

The correct option is B distillation with CaO and Ca
$R e c t i f i e d s p i r i t C a O + C a - ---- \to A b s o l u t e a l c o h o l$
In preparing anhydrous alcohol. Spirit react with quicklime for some days and then distill off the alcohol slowly from a water-bath and treat the product in the same way.

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