Absolute alcohol (100\% alcohol) is prepared by distilling rectified spirit over

Absolute alcohol (100\% alcohol) is prepared by distilling rectified spirit over
  1. $\mathrm{Na}$
  2. $\mathrm{CaCl}_2$
  3. $\mathrm{Mg}$
  4. $\mathrm{Mg}\left(\mathrm{OC}_2 \mathrm{H}_5\right)_2$

Solution

Rectified spirit ( $95.6 \%$ alcohol), on distillation, either with magnesium ethoxide or quick lime gives absolute alcohol.

Asked in: AP EAMCET 2001

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