After testing soil and finding it acidic, a student recommends adding lime to it. What is the main reason for this recommendation?
Answer and explanation
Correct answer: Lime neutralises the acidity of soil and raises its pH
The governing concept is neutralisation. Lime, commonly supplied as calcium oxide or calcium hydroxide, is basic, whereas acidic soil contains excess acidic substances. The base reacts with and neutralises that acidity, so the soil pH rises towards a more suitable range for plant growth. Option A is therefore correct. Options B, C and D describe effects that are not the purpose of liming acidic soil.
Frequently asked questions
What is the correct answer to this question?
Lime neutralises the acidity of soil and raises its pH
Why is this the correct answer?
The governing concept is neutralisation. Lime, commonly supplied as calcium oxide or calcium hydroxide, is basic, whereas acidic soil contains excess acidic substances. The base reacts with and neutralises that acidity, so the soil pH rises towards a more suitable range for plant growth. Option A is therefore correct. Options B, C and D describe effects that are not the purpose of liming acidic soil.
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.
