Who are they? Be more specific, and you will get the answer you are looking for.
It doesn't contain an acid, it is an acid. Lactic acid to be precise.
They contain Sulfuric Acid.
Interestingly enough I just read today that it did contain said acid! H3PO4
No, sprite does not contain acetic acid, however, it does contain citric acid.
Yes it does contain citric acid!
coke contain gastric acid
Yes, they contain phenolic acid! Incorrect !!! No, since they contain citric acid.
Dyes don't contain sulphuric acid.
The stomach contain hydrochloric acid.
Yes grapes contain citric acid.
The citric acid doesn't contain alcohol.
No- hydrochloric acid is an acid and is the opposite of an alkali so no alkalis contain it