Final answer:
Ethyl alcohol, or ethanol, when termed as 'absolute,' refers to its pure, undiluted form. The correct answer is e. 100 percent "absolute" alcohol, which indicates it is entirely pure ethanol with no other substances mixed in.
Step-by-step explanation:
Ethyl alcohol, or ethanol, is a chemical compound with the formula C₂H₆O, which can be simplified to CH₃CH₂OH or C₂H₅OH. Ethanol is found in alcoholic beverages and is produced by fermenting sugars with yeast. When referring to 'absolute' alcohol, it implies that the alcohol is pure without any water content. Hence, when we are talking about ethyl alcohol being 'absolute', it refers to its purest form that is not mixed with any other substances.
Given the choice among varying percentages, the correct answer will be that ethyl alcohol or ethanol when mentioned as 'absolute' refers to e. 100 percent "absolute" alcohol, meaning it is entirely ethanol with no water or other impurities.