There are two jars A and B containing food materials. Food in jar ‘A’ is pickled with acetic acid while ‘B’ is not. Food of which of jar will stale first? Explain. Name two synthetic indicators which are used to test acids and bases.
Food in jar ‘B’ will stale first because it will undergo oxidation and will also be attacked by microorganisms. Synthetic indicators: Phenolphthalein, methyl orange.
