Plant roots are not growing well in highly acidic soil. Which substance will be useful in a suitable amount?
Answer and explanation
Correct answer: Slaked lime
The governing concept is neutralisation and correction of soil pH. Highly acidic soil has an excess of acidic substances and a low pH. Slaked lime, Ca(OH)₂, is a base; when applied in a carefully measured amount, it reacts with acidic components and raises the soil pH toward a more suitable range. Therefore option C is correct. Lemon juice, vinegar, and dilute acid are acidic and would generally intensify the problem rather than correct it.
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What is the correct answer to this question?
Slaked lime
Why is this the correct answer?
The governing concept is neutralisation and correction of soil pH. Highly acidic soil has an excess of acidic substances and a low pH. Slaked lime, Ca(OH)₂, is a base; when applied in a carefully measured amount, it reacts with acidic components and raises the soil pH toward a more suitable range. Therefore option C is correct. Lemon juice, vinegar, and dilute acid are acidic and would generally intensify the problem rather than correct it.
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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