Radish is my last test subject! The strips in the acid range faded into a pinkish-orange colour, while those in alkaline turned purple-bluish at the sides. The liquid in pH 2 became orange, pinkish in pH 3 and light green in pH 12. Both radish and purple cabbage contain anthocyanin, it seems that radish, like purple cabbage, can be used as a pH indicator.
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