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Litmus Paper in Acid
Red (Litmus)
Litmus Paper in Base
Blue (Litmus)
Phenolphthalein in Acid
Colourless (Phenolphthalein)
Phenolphthalein in Base
Pink (Phenolphthalein)
Methyl Orange in Acid
Red (Methyl Orange)
Methyl Orange in Base
Yellow (Methyl Orange)
Bromothymol Blue in Acid
Yellow (Bromothymol Blue)
Bromothymol Blue in Base
Blue (Bromothymol Blue)
Phenol Red in Acid
Yellow (Phenol Red)
Phenol Red in Base
Red (Phenol Red)
