Which substance can be suitable to treat acidic soil for farming?
Answer and explanation
Correct answer: Slaked lime
The governing concept is acid-base neutralisation. Acidic soil has an excess of acidic substances, so a suitable treatment should be mildly basic rather than another acid. Slaked lime, calcium hydroxide, is basic and can react with excess acidity, helping raise the soil pH toward a more suitable range. Thus option A is correct. Vinegar, lemon juice, and dilute hydrochloric acid are acidic, so adding them would generally increase rather than reduce soil acidity.
Frequently asked questions
What is the correct answer to this question?
Slaked lime
Why is this the correct answer?
The governing concept is acid-base neutralisation. Acidic soil has an excess of acidic substances, so a suitable treatment should be mildly basic rather than another acid. Slaked lime, calcium hydroxide, is basic and can react with excess acidity, helping raise the soil pH toward a more suitable range. Thus option A is correct. Vinegar, lemon juice, and dilute hydrochloric acid are acidic, so adding them would generally increase rather than reduce soil acidity.
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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