Question

Which of the following statements are correct?
(i). Ordinary ethyl alcohol is known as grain alcohol.
(ii). Methylated spirit contains rectified spirit.
(iii). Absolute alcohol is $100\%$ ethanol.
(iv). Rectified spirit is $100\%$ ethanol.
(A). $2,3,4$
(B). $2,3$
(C). $1,2,3$
(D). All are correct.

Answer 1

Alcohol, sometimes referred to by the chemical name ethanol, is a psychoactive drug that is the active ingredient in drinks such as beer, wine and distilled spirits.

Complete step by step answer:
Grain alcohol is a purified form of ethyl alcohol made from the distillation of fermented grain. The ethanol is produced via fermentation of sugars in the grain by yeast prior to repeated distillation or rectification. The term ‘grain alcohol’ may be used to refer to any ethanol produced from grain or another agricultural origin or it may be reserved to describe alcohol that is at least $90\%$ pure.
Hence, (i) is correct.

Rectified spirit, also known as neutral spirits, rectified alcohol, or ethyl alcohol of agricultural origin is highly concentrated ethanol that has been purified by means of repeated distillation is a process called rectification. In some countries, denatured alcohol or denatured reaction spirit may commonly be available as ‘rectified spirit’.
Hence, (ii) is correct.

Absolute alcohol is a common name for the chemical compound ethanol. To qualify as ‘absolute’ , the ethyl alcohol must contain no more than one percent water. In other words, absolute alcohol is liquid alcohol that is at least $99\%$ pure alcohol by weight. Ethanol is a colourless liquid with molecular formula ${C_2}{H_5}OH$ . It is the alcohol found in alcohol beverages.
Hence, (iii) is correct.

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 $78.13^\circ C$.
Hence, (iv) is wrong.

So, the correct answer is Option C .

Note:
Since $100\%$ ethanol is so hydrophilic it pulls water straight out of the atmosphere to mix with you won’t get $100\%$. Distillation only gets you up to $\sim 95\%$ after which you'll use a desiccant to remove the water.