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Class 10ScienceChemical Substances – Nature and BehaviourAcids, Bases, and SaltsMedium
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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.

Related tags

Soil TreatmentBasic SoilOrganic ManurePhAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour
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10 more MCQs
  1. 1What type of substance turns blue litmus paper red?
  2. 2What type of substance turns red litmus paper blue?
  3. 3Which of the following substances acts as a natural indicator?
  4. 4What is the general nature of an aqueous soap solution?
  5. 5Which of the following substances turns red litmus paper blue?
  6. 6What is the nature of a solution whose pH is less than 7?
  7. 7At 25°C, a solution with a pH greater than 7 is of which nature?
  8. 8A student dips red litmus paper into a soap solution. What change will occur in the red litmus paper?
  9. 9Which gas is generally produced when dilute acids react with active metals?
  10. 10A student dips red litmus paper into a soap solution. What will be the colour of the litmus paper?
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