Q.12 What do you understand by alkalis?
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1 : a soluble salt obtained from the ashes of plants and consisting largely of potassium or sodium carbonate broadly : a substance (such as a hydroxide or carbonate of an alkali metal) having marked basic properties — compare base sense 6a. 2 : alkali metal.
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A soluble salt obtained from the ashes of plants and consisting largely of potassium or sodium carbonate is called alkali.
An alkali is a substance with a pH value of more than 7.
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