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A base is any substance that neutralizes acid. It may or may not be soluble in water.
Those bases which are soluble in water are called alkalis.
Thus an alkali is a water-soluble base. For example NaOH, KOH etc.
Alkali, as well as base neutralize acid, but we have observed that alkali produce OH− ions in the water, whereas bases such as copper oxide and ferrous do not produce OH− ions.
This is why it is said that all alkalis are bases but all bases are not alkalis.
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| S.No | Acids | Bases
|
| 1. | Its taste is sour. | Its taste is bitter. |
| 2. | When added to litmus solution, it turns red. | When added to litmus solution, it turns blue. |
| 3. | Examples: Curd, lemon juice and vinegar | Examples: Baking soda, Soap and lime water. |
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