A student added an acidic substance to already acidic soil. What effect is likely on plant growth?
Answer and explanation
Correct answer: Growth may be affected further
Plant growth depends on a suitable soil pH and on the availability of nutrients. If soil is already acidic, adding another acidic substance can lower its pH further and may make nutrient uptake or root health worse. Thus option A is the most appropriate conclusion. Neutralisation would require a suitable basic material, such as carefully applied slaked lime; the soil will not automatically become neutral or basic, and pH is not irrelevant.
Frequently asked questions
What is the correct answer to this question?
Growth may be affected further
Why is this the correct answer?
Plant growth depends on a suitable soil pH and on the availability of nutrients. If soil is already acidic, adding another acidic substance can lower its pH further and may make nutrient uptake or root health worse. Thus option A is the most appropriate conclusion. Neutralisation would require a suitable basic material, such as carefully applied slaked lime; the soil will not automatically become neutral or basic, and pH is not irrelevant.
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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