A food with a pH below 4.6 is high in acid. This includes many citrus fruits, plums, grapes, pomegranates, and several other fruits. Tomatoes, which are technically a fruit, are also acidic. Defining ...

If a substance has a pH of 2, what does it mean -- acidic or alkaline? Read to know the answer! pH -- an abbreviation you might have come across many times but do you know what it means? Well, pH ...