Question

take 2ml of dilute NaOHin test tube and add 2drops of phenolphthalein indicators, solution colour changes to pink, when u add dilute HCL drop by colour gradually disappear​

Answer 1

Answer:

Exactly

Explanation:

Phenolphthalein is solution indicatior which helps to detect solution nature.

FOR BASIC SOLUTION: When indicator is added to solution, it turns to pink as it is basic in nature.

FOR ACIDIC SOLUTION: When indicator is added to acidic solution, it turns to invisible colour due to more concentration of hydronium ions.