A few drops of phenolphthalein indicator were added to an unknown solution A. It acquired pink color. Now another unknown solution B was added to it dropwise and the solution ultimately became colorless. Predict the nature of solutions A and B.

Question

Toppr Admin · Accepted Answer

-A- is basic in nature as phenolphthalein has imparted pink color to it- Solution -B- is acid as it has made solution -A- colorless by neutralizing its basic nature-160-

A few drops of phenolphthalein indicator were added to an unknown solution A. It acquired a pink colour. Now another unknown solution B was added to it drop by drop and the solution became colourless. Predict the nature of A & B.

$$A$$ is basic in nature as phenolphthalein has imparted pink color to it. Solution $$B$$ is acid as it has made solution $$A$$ colorless by neutralizing its basic nature.