A soil has pH 5 and crops are not growing well. Which method is scientifically more suitable?
Answer and explanation
Correct answer: Add a suitable amount of slaked lime
A soil pH of 5 indicates appreciable acidity, which can hinder the availability of nutrients and affect crop growth. Slaked lime, calcium hydroxide, is a base; in a carefully measured amount it neutralises part of the excess acidity and raises the soil pH toward a more suitable range. Hence option A is correct. Vinegar, lemon juice, and dilute acid would add acidity and generally worsen the stated problem.
Frequently asked questions
What is the correct answer to this question?
Add a suitable amount of slaked lime
Why is this the correct answer?
A soil pH of 5 indicates appreciable acidity, which can hinder the availability of nutrients and affect crop growth. Slaked lime, calcium hydroxide, is a base; in a carefully measured amount it neutralises part of the excess acidity and raises the soil pH toward a more suitable range. Hence option A is correct. Vinegar, lemon juice, and dilute acid would add acidity and generally worsen the stated problem.
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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