Vineger is a solution of: 

5-8% solution of acetic acid

The correct answer is option 1. 5-8% solution of acetic acid.

Vinegar is a liquid that is primarily composed of water and acetic acid. Acetic acid is a weak acid with the chemical formula \(CH_3COOH\). When acetic acid dissolves in water, it forms a solution commonly known as vinegar.

The concentration of acetic acid in vinegar can vary depending on the type of vinegar and its intended use. However, the most common concentration range for household vinegar is approximately 5-8% solution of acetic acid. This means that for every 100 mL of vinegar, there are approximately 5-8 mL of acetic acid.

This concentration range gives vinegar its characteristic sour taste and acidic properties. It is widely used in cooking, food preservation, pickling, and as a condiment. Additionally, vinegar has various household uses, including cleaning, deodorizing, and as a natural remedy for certain ailments.

The acidity of vinegar plays a crucial role in its functionality and versatility in both culinary and non-culinary applications. However, it's essential to handle vinegar with care due to its acidic nature.