Which substance can help reduce excessive basicity of basic soil?
Answer and explanation
Correct answer: Organic manure
The governing idea is that soil treatment should counter the unwanted pH. Excessively basic soil can be improved by adding organic manure, because decomposition of organic matter produces acidic substances gradually and can lower the soil's basicity. Therefore option A is the best answer. Slaked lime, caustic soda, and sodium carbonate are basic or alkaline substances; adding them would not normally reduce basicity and could make the condition worse.
Frequently asked questions
What is the correct answer to this question?
Organic manure
Why is this the correct answer?
The governing idea is that soil treatment should counter the unwanted pH. Excessively basic soil can be improved by adding organic manure, because decomposition of organic matter produces acidic substances gradually and can lower the soil's basicity. Therefore option A is the best answer. Slaked lime, caustic soda, and sodium carbonate are basic or alkaline substances; adding them would not normally reduce basicity and could make the condition worse.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
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