defination of acid according to 7th class
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An acid is a chemical species that donates protons or hydrogen ions and/or accepts electrons. The pH is less than 7.
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Explanation:
Acids =]
=> An acid is a chemical substance that has a sour taste.
=> Many food items such as lemons, curd, vinegar and orange taste sour because of the presence of acid in them.
=> Acidic Substances are the substances that contain acid in them.
=> Natural Acids are the acids that occur in nature, for example, acids found in fruits are natural acids.
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