Which of the following is used to denature ethanol? A. Methyl alcohol B. Propyl alcohol C. Phenol D. Methane

Methyl alcohol
Propyl alcohol
Phenol
Methane

The correct answer is A. Methyl alcohol.

Methyl alcohol, also known as wood alcohol, is a colorless, flammable liquid that is used as a solvent and fuel. It is also used to denature ethanol, which is the process of adding a poisonous substance to ethanol to make it unfit for human consumption.

Propyl alcohol, also known as isopropyl alcohol, is a colorless, flammable liquid that is used as a solvent and antiseptic. It is not used to denature ethanol.

Phenol, also known as carbolic acid, is a white, crystalline solid that is used as a disinfectant and antiseptic. It is not used to denature ethanol.

Methane is a colorless, odorless, flammable gas that is the main component of natural gas. It is not used to denature ethanol.