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Question

Absolute alcohol is a:


A

100% ethanol

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B

Ethanol+water+phenol

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C

95% ethanol+5% water

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D

95% ethanol + 5% methanol

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Solution

The correct option is A

100% ethanol


The explanation for the correct option:

(A) 100% ethanol: Absolute alcohol is 100% pure ethyl alcohol. i.e., ethanol.It doesn't contain more than one percent water.This is the alcohol which is present in alcoholic beverages.It is prepared by azeotropic distillation from rectified spirit.

The explanation for the incorrect option:

(B) Ethanol+water+phenol: Absolute alcohol contains ethyl alcohol with less than one precentage of water.It doesn't contain phenol in it.So the option is wrong.

(C) 95% ethanol+ 5% water: Absolute alcohol is prepared by azeotropic distillation from rectified spirit.The mixture of 95% ethanol and 5% water is known as rectified spirit.

(D) 95% + 5%methanol: The mixture of 95% and 5%methanol is known as methylated spirit.Methylated spirit is also called as denatured alcohol which can be used as fuel and solvent.

Therefore, option(A) is correct. i.e., absolute alcohol is 100% ethanol.


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