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Class 10ScienceChemical Substances – Nature and BehaviourAcids, Bases, and SaltsMedium
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Why does a farmer add slaked lime to highly acidic soil?

Answer and explanation

Correct answer: To reduce the acidity of the soil

The governing concept is acid–base neutralisation in soil treatment. Slaked lime, Ca(OH)₂, is a basic substance. When it is mixed with highly acidic soil, it reacts with excess acidic components and reduces their effect, bringing the soil closer to a suitable pH for plant growth. Therefore option A is correct. The treatment does not increase acidity, manufacture chlorine, or convert soil into salt.

Related tags

Soil AciditySlaked LimeNeutralisationPhAcidsBasesAnd 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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