Question

The colour of phenolphthalein indicator in NaOH
A) Yellow
B) Green
C) Pink
D) Orange​

Answer 1

C) Pink

Phenolphthalein is an indicator of acids (colorless) and bases (pink). Sodium hydroxide is a base, and it was in the pitcher at the beginning, so when added to the phenolphthalein in beakers 2 and 4, it turned pink (top half of the graphic)

Answer 2

The colour of phenolphthalein indicator in NaOH is Pink

option C