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If plant growth is poor in acidic soil, which substance can be carefully used to improve its pH?

Answer and explanation

Correct answer: Slaked lime

The governing concept is neutralisation and soil pH management. Acidic soil has a pH below the preferred range for some plants. Slaked lime, Ca(OH)2, is a basic substance; when applied in a suitable measured quantity, it neutralises some soil acidity and raises the pH. Hence option A is correct. Vinegar, lemon juice, and dilute acids are acidic, so adding them would generally increase rather than reduce soil acidity.

Related tags

Soil PhSlaked LimeNeutralisationAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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