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Primary leaving examination
Primary leaving examination
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An alkali is a soluble base. OR An alkali is a substance which when dissolved in water produces hydroxide ions as the only negatively charged ions in solution. Examples are Sodium hydroxide, Potassium hydroxide, Ammonium hydroxide and calcium hydroxide.
An alkali is a soluble base.
OR
An alkali is a substance which when dissolved in water produces hydroxide ions as the only negatively charged ions in solution. Examples are Sodium hydroxide, Potassium hydroxide, Ammonium hydroxide and calcium hydroxide.
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Hello. And Bye.
Hello. And Bye.
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A base is a substance that reacts with an acid to form salt and water only.
A base is a substance that reacts with an acid to form salt and water only.
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Loam soil is a mixture of sand about 40%, clay 15% and organic matter 1-4%. It is dark and has a stable crumb structure Clay soil is heavy and has fine particles with a sticky feel when wet. Sandy soil is light and has a gritty when wet
Loam soil is a mixture of sand about 40%, clay 15% and organic matter 1-4%. It is dark and has a stable crumb structure
Clay soil is heavy and has fine particles with a sticky feel when wet.
Sandy soil is light and has a gritty when wet
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