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The following table shows the pH values of four solutions A, B, C and D on a pH scale : The solutions A, B, C and D respectively are of a
Seawater contains many salts dissolved in it. Common salt is separated from these salts. Deposits of solid salt are also found in several parts of the world. These large crystals are often brown due to impurities. This is called rock salt and is mined like coal. The common salt is an important raw material for chemicals of daily use.
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