Diluted form of ethanoic acid is known as?

Vinegar

The correct answer is option 3. Vinegar.

Ethanoic acid is another name for acetic acid, which has the chemical formula \(CH_3COOH\). When acetic acid is diluted with water, it forms a solution known as vinegar.

Vinegar is a common household product used in cooking, food preservation, pickling, and as a condiment. It has a sour taste and distinctive smell due to the presence of acetic acid. The concentration of acetic acid in vinegar typically ranges from 5% to 8%, although it can vary depending on the type and intended use.

The process of making vinegar involves fermentation, where ethanol (the alcohol in alcoholic beverages) is oxidized by acetic acid bacteria to produce acetic acid. This fermentation process occurs naturally in certain foods and beverages, such as wine, beer, cider, and fruit juices, leading to their transformation into vinegar if left exposed to air.

In summary, the diluted form of ethanoic acid is called vinegar. It is a versatile liquid used in various culinary and household applications, thanks to its acidic properties and distinctive flavor.