Question

sodium hydroxide in a test tube. add two drops of phenolphthalein​

Answer 1

Answer:

solution turns deep pink as NaOH is a strong base.

Explanation:

Answer 2

Answer:

since phenolphthalein is a basic indicator therefore the colour of phenolphthalein will change from colourless solution to pink coloured solution due to reaction of it with base

like sodium hydroxide