Question

Paheli Is Writing Some Statements. She Wants To Know In Which Of The Following Statements Is Or Are Incorrect? 

(a) Phenolphthalein indicator is natural acid base indicator

(b) Phenolphthalein indicator is colourless in acid solution

(c) Phenolphthalein indicator is gives pink colour in basic solution

(d) The substance whose solution do not change the colour of any indicator, called neutral substances



PLEASE ANSWER FAST I WILL MARK U AS BRAINLIEST ​

Answer 1

The Statement which is incorrect is (a) Phenolphthalein indicator is natural acid base indicator.

Explanation:

• Phenolphthalein solution is a colorless solution used as an acid–base indicator and medicinally as a laxative.
• It is a synthetic indicator which is remains colorless in acidic and neutral medium but gives bright pink color in basic medium. For example: the phenolphthalein will give pink color in sodium hydroxide solution but will remain colorless in vinegar.

Hence, The Statement which is incorrect is (a) Phenolphthalein indicator is natural acid base indicator.