This quiz works best with JavaScript enabled. Home > Agriculture > Soil Science > Chemistry > Soil Chemistry – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Soil Chemistry Quiz 1 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Is loamy soil good for growing plants? A) Yes, it is the best. B) Yes, but only when it is in a pot. C) No, it holds too much water. D) No, it does not hold enough water. Show Answer Correct Answer: A) Yes, it is the best. 2. What is the main component of soil? A) Rock particles. B) Humus. C) Water. D) Air. Show Answer Correct Answer: A) Rock particles. 3. What is the only process that removes carbon from the atmosphere? A) Photosynthesis. B) Cellular respiration. C) Decomposition. D) Combustion. Show Answer Correct Answer: A) Photosynthesis. 4. How do animals get the nitrogen they need? A) From the air they breathe. B) From the sun. C) From the food they eat. D) From the water they drink. Show Answer Correct Answer: C) From the food they eat. 5. A Horizon is also called A) Bedrock. B) C horizon. C) B horizon. D) Topsoil. Show Answer Correct Answer: D) Topsoil. 6. PH is important because A) It determines a soil's suitability for life. B) It determines whether nutrient elements are at optimal, deficient, or toxic levels. C) It determines the fate of soil pollution. D) All answers are correct. Show Answer Correct Answer: D) All answers are correct. 7. What is the role of soil microorganisms? A) Make soil porous. B) Make soil rich in humus. C) Both the above options. D) None of above. Show Answer Correct Answer: B) Make soil rich in humus. 8. It is the loss of soil by the action of both water and wind. A) Desertification. B) Transpiration. C) Deforestation. D) Soil Erosion. Show Answer Correct Answer: D) Soil Erosion. 9. If the atmosphere is 78% N2, why can't we just get our nitrogen by breathing? A) The legumes take it up first. B) We have no mechanism to break the triple bond of nitrogen between the atoms. C) We need Oxygen for cellular respiration. D) Our lungs would be damaged by the N2. Show Answer Correct Answer: B) We have no mechanism to break the triple bond of nitrogen between the atoms. 10. The alternate freezing and thawing ofthe water during the winter causes the cracks to enlarge, breaking off small pieces of rocks. A) Time. B) Topography. C) Climate. D) Organism. Show Answer Correct Answer: C) Climate. 11. The following are products of decomposition except: A) Oxygen. B) Nutrient minerals. C) Carbon dioxide. D) Water. Show Answer Correct Answer: A) Oxygen. 12. Soil water has certain functions in the soil. A) Anchors the roots. B) Infiltration. C) Increases Cation Exchange Capacity. D) None of above. Show Answer Correct Answer: B) Infiltration. 13. Which type of soil has the largest particles? A) Sand. B) Silt. C) Clay. D) Loam. Show Answer Correct Answer: A) Sand. 14. Which of the following soil has the smallest particles A) Clayey Soil. B) Loamy Soil. C) Sandy Soil. D) Silt Soil. Show Answer Correct Answer: A) Clayey Soil. 15. Toys, Pots and Statues are made of which soil type? A) Sandy Soil. B) Clayey Soil. C) Loamy Soil. D) None of these. Show Answer Correct Answer: B) Clayey Soil. 16. Water cannot penetrate through which layer? A) A-Horizon. B) O-Horizon. C) B-Horizon. D) Bedrock. Show Answer Correct Answer: D) Bedrock. 17. Which layer is interaction between A-Horizon and B-Horizon A) E-Horizon. B) 0-Horizon. C) C-Horizon. D) Bedrock. Show Answer Correct Answer: A) E-Horizon. 18. What is sandy soil A) Containing greater proposition of big particles. B) Have fine particles relatively higher. C) The mixture of sandy and clayey soil. D) A bedrock. Show Answer Correct Answer: A) Containing greater proposition of big particles. 19. A solution with a pH greater than 7 would be considered: A) Neutral. B) Alkaline/basic. C) Acidic. D) None of above. Show Answer Correct Answer: B) Alkaline/basic. 20. In which soil does the water seeps out very fast A) Loamy soil. B) Sandy Soil. C) Clayey Soil. D) Silt Soil. Show Answer Correct Answer: B) Sandy Soil. 21. The presence or absence of mountains and valleys, is also involved in soil formation. A) Time. B) Topography. C) Climate. D) Organism. Show Answer Correct Answer: B) Topography. 22. What is the pH range which provides for the optimal availability of plant essential nutrients (elements)? A) 12.3-14.2. B) 6.3-7.2. C) 2.3-3.3. D) None of the answers are correct. Show Answer Correct Answer: B) 6.3-7.2. 23. ..... is the topmost layer of soil. A) Topsoil. B) Nitrogen. C) Bedrock. D) Subsoil. Show Answer Correct Answer: A) Topsoil. 24. What type of molecule is water? A) Negative. B) Universal. C) Positive. D) Polar. Show Answer Correct Answer: D) Polar. 25. Which of the following is true. In a soil with a high clay content A) More lime is required to correct pH. B) Nitrogen leaching is more likely. C) There is a low water-holding capacity. D) Will drain much faster and better than sandy soil. Show Answer Correct Answer: A) More lime is required to correct pH. 26. What do you mean by humas A) A vertical session. B) The rotting of dead matter in the soil. C) Action of breaking rocks by wind. D) Rocks. Show Answer Correct Answer: B) The rotting of dead matter in the soil. 27. Which element causes soil to appear red? A) Silicon. B) Nickel. C) Iron. D) Calcium. Show Answer Correct Answer: C) Iron. 28. These are pesticides that come from natural sources such as plants or bacteria. A) Insecticides. B) Herbicides. C) Biopesticides. D) Rodenticides. Show Answer Correct Answer: C) Biopesticides. 29. Capillarity occurs due to A) Cohesion and adhesion. B) Gravitational movement. C) Hygroscopic adhesion. D) None of above. Show Answer Correct Answer: A) Cohesion and adhesion. 30. Which type of soil has a gritty texture? A) Sand. B) Silt. C) Clay. D) Loam. Show Answer Correct Answer: A) Sand. Next →Related QuizzesSoil Science QuizzesAgriculture QuizzesSoil Chemistry Quiz 2Soil Chemistry Quiz 3Soil Chemistry Quiz 4 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books