A farmer finds that the soil is acidic, resulting in poor crop growth. Which substance should be added to reduce the acidity of the soil?
Answer and explanation
Correct answer: Quicklime, calcium oxide
Quicklime is calcium oxide, CaO, a basic oxide. When added carefully to acidic soil, it reacts with the excess acidic substances and helps neutralise them, bringing the soil closer to a suitable pH for crops. Hydrochloric acid and vinegar are acids and would increase acidity, while sodium chloride is not the appropriate neutralising material. Hence, option A is correct.
Frequently asked questions
What is the correct answer to this question?
Quicklime, calcium oxide
Why is this the correct answer?
Quicklime is calcium oxide, CaO, a basic oxide. When added carefully to acidic soil, it reacts with the excess acidic substances and helps neutralise them, bringing the soil closer to a suitable pH for crops. Hydrochloric acid and vinegar are acids and would increase acidity, while sodium chloride is not the appropriate neutralising material. Hence, option A is correct.
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.
