Which acid is present in grapes?

Organic acid:

• An organic acid is a chemical compound with acidic properties.
• The most common organic acid is a carboxylic acid that contains $-\mathrm{COOH}$ carboxyl group.

Acid in grapes:

• The acid that is present in grapes is Tartaric acid as well as L-malic acid.
• Tartaric acid is used to give acidic flavor to grapes.
• This acid plays a vital role in maintaining the pH in juices containing grapes.
• The structure of Tartaric acid is given below: