A few drops of phenolphthalein indictor were added to an unknown solution A. It scquired pink colour Now another unknown solution B was added to it dropwise and the solution ultimately because colourless. Predict the nature of the solution A and B.

Explanation

The solutio A is basic in nature and phenolphthalein has imparted pink colour to it. The solution B is of an acid which has ultimately made solution A colourless by neutralising its basic effect.