Question

5--8% solution of acetic acid in water is called:

• A. Tincture
• B. Vinegar
• C. Ester
• D. Rectified spirit

Hint:

Important facts:
• Acetic acid formula: \( CH_3COOH \)
• Dilute acetic acid solution is called vinegar.
• Vinegar is widely used in food preservation and cooking.

Answer 1

The Correct Option is B

Concept:
Acetic acid is a weak organic acid with chemical formula: \[ CH_3COOH \] When acetic acid is dissolved in water in small concentration approximately between \(5\%\) and \(8\%\), the resulting solution is called vinegar. Vinegar is commonly used:
• In food preservation
• In cooking
• In pickles
• As a cleaning agent

Step 1: Identify the chemical mentioned in the question.
The question refers to: \[ 5\%-8\% \text{ acetic acid solution} \] Acetic acid dissolved in water in this concentration is commonly known as vinegar.

Step 2: Analyze each option carefully.
Option (A): Tincture
Tincture is generally an alcoholic solution containing medicinal substances. Example: \[ \text{Tincture iodine} \] Hence, incorrect. Option (B): Vinegar
Vinegar contains dilute acetic acid solution. Hence, this option is correct. Option (C): Ester
Esters are compounds formed by reaction between acids and alcohols. They usually have pleasant fruity smells. Hence, incorrect. Option (D): Rectified spirit
Rectified spirit is concentrated ethanol solution. Hence, incorrect.

Step 3: Choose the correct answer.
Thus, \(5\%-8\%\) solution of acetic acid is: \[ \boxed{\text{Vinegar}} \] Hence, \[ \boxed{(2)\ \text{Vinegar}} \]