Practical Organic Chemistry

A compound '\(\mathrm{X}\)' when treated with phthalic anhydride in presence of concentrated \(\mathrm{H}_{2} \mathrm{SO}_{4}\) yields '\(\mathrm{Y}\)'. '\(\mathrm{Y}\)' is used as an acid/base indicator. '\(\mathrm{X}\)' and '\(\mathrm{Y}\)' are respectively