Acids, Bases and Salts

Fill the blanks in the following sentences
(a) Lemon juice and vinegar taste ___________ because they
contain ___________.
(b) Turmeric and litmus are _________ acid-base indicators.
(c) Phenolphthalein gives _________ colour with lime water.
(d) When an acidic solution is mixed with a basic solution,
they _________ each other forming _________ and water.