During neutralisation of an acid by a base, the end point refers for the completion of reaction. The detection of end point in acid -base neutralisation is usually made by an acid-base indicator. An acid-base indicator is itself a weak acid (Phenolphthlein) or a weak base (Mrthyl orange). At about 50% ionisation which depends on the medium, the anion furnished by an indicator (acid) or cation furnished by indicator (basic) imparts its characteristic colour to solution at point. For example phenolphthalein, the dissociation is underset("Colourless")(H In hArr H^(+))+underset("Pink")(In^(-)), K_(H In)= ([H^(+)][In^(-)])/([H In]) favoured in presence of alkali and pink colour of phenolphalein ion is noticed as soon as the medium changes to alkaline nature. The end point of acid-base neutralisation not necessarily coincides with equivalent point but it is closer and closer to equivalence point. Also at equivalence point of acid-base neutralisation pH is not necessarliy equal to 7. Which of the following statements are correct ? (1) Phenolphthalein is not a good indicator for weak alkali titrations (2) Phenolphthalein does not give pink colour with weak alkalies as NH_(4)OH (3) Phenolphthalein is an acid indicator and imparts colour in basic medium (4) Phenolphthalein isa basic indicator and imparts colour in basic medium (5) Phenolphthalein furnishes coloured cation