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Answer:
1. acetic acid - monoprotic acid - acetic acid bacteria, notably the genus Acetobacter and Clostridium acetobutylicum. These bacteria are found universally in foodstuffs, water, and soil, and acetic acid is produced naturally as fruits and other foods spoil
2. fizzy drinks - phosphoric acid - Foods that are high in protein (e.g. meat, beans, eggs, chicken, and fish) are usually high in phosphorus as well. This means additional phosphoric acid from processed food and soda is likely more than the body needs. Dark-colored sodas tend to have more phosphoric acid.
3. lactic acid - carboxylic acid - Carboxylic acids occur widely in nature. The fatty acids are components of glycerides, which in turn are components of fat. Hydroxyl acids, such as lactic acid (found in sour-milk products) and citric acid (found in citrus fruits), and many keto acids are important metabolic products that exist in most living cells.
4. tataric acid - dihydroxybutanedioic acid - Tartaric acid naturally occurs in plants like grapes, apricots, apples, bananas, avocados and tamarinds. It is added in foods giving a sour taste and serving as an antioxidant.
5. formic acid - carboxylic acid - Formic acid is also present in a natural state in stinging nettles, and is is reponsible for the burning feeling on contact with them. It is also found in the stings and bites of many insects, including bees and ants, which use it as a chemical defence mechanism.