JAMB - Chemistry (2005 - No. 3)
Phenolphthalein in acidic solution is
red
orange
colourless
yellow
Explication
Phenolphthalein, a common acid-base indicator, remains colourless in acidic solutions but turns pink in basic solutions.
Phenolphthalein, a common acid-base indicator, remains colourless in acidic solutions but turns pink in basic solutions.