an acid changes the color of litmus paper from blue to red & an acid is corrosive ->  an acid is corrosive and can change the color of litmus paper from blue to red  lemon juice changes the color of litmus paper from blue to red & lemon juice is corrosive ->  lemon juice is corrosive and can change the color of litmus paper from blue to red  an acid is corrosive and can change the color of litmus paper from blue to red & lemon juice is corrosive and can change the color of litmus paper from blue to red ->  lemon juice is a kind of acid  lemon juice is a kind of acid & an acid is often sour in taste -> lemon juice is sour in taste