What is the purpose of adding slaked lime to acidic soil?
Answer and explanation
Correct answer: To reduce soil acidity
The governing concept is neutralisation. Acidic soil has a pH below the suitable range, while slaked lime, calcium hydroxide, is a basic substance. Its hydroxide ions react with acidic components in the soil and reduce excess acidity, helping bring the pH closer to a level suitable for plant growth. Therefore option A is correct. Option B reverses the effect, while C and D describe unrelated changes that do not occur.
Frequently asked questions
What is the correct answer to this question?
To reduce soil acidity
Why is this the correct answer?
The governing concept is neutralisation. Acidic soil has a pH below the suitable range, while slaked lime, calcium hydroxide, is a basic substance. Its hydroxide ions react with acidic components in the soil and reduce excess acidity, helping bring the pH closer to a level suitable for plant growth. Therefore option A is correct. Option B reverses the effect, while C and D describe unrelated changes that do not occur.
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.
