Question

which which of the following solution will be turn phenolphthalein pink ❓
A. HCL( aq)
B .CO 2(aq)
C.KOH(aq)
D .H2SO4(aq)​

Answer 1

Answer:

co2 is a phenolphalien pink solution

Answer 2

The solution that turns phenolphthalein colorless is aq. KOH.

Explanation:

• Phenolphthalein turns colorless in presence of an acid and turns pink in presence of a base.
• As aq. hydrochloric acid and aq. sulphuric acids being acidic in nature turns the phenolphthalein colorless.
• Therefore, the basic aq. KOH (potassium hydroxide) turns the phenolphthalein into pink color.
• The aq. carbon dioxide is also acidic in nature and therefore it will turn the phenolphthalein colorless.