Lemon juice and vinegar, for two (5)
I believe the answer is:
acids
(Other definitions for acids that I've seen before include "they're sharp" , "They react" , "They have a sour taste" , "They turn litmus paper red" , "Corrosive substances" .)
I believe the answer is:
acids
(Other definitions for acids that I've seen before include "they're sharp" , "They react" , "They have a sour taste" , "They turn litmus paper red" , "Corrosive substances" .)