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CSEE (Form 4) Soil Chemistry — practice questions

Explore 3 free Soil Chemistry questions in CSEE (Form 4) Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Soil Chemistry questions and exercises with answers

Showing questions 1–3 of 3.

What is the role of organic matter in soil?Read the answer and worked solution →Fault the wrong rolesRead the answer and worked solution →Organic matter or micro-organisms?Read the answer and worked solution →

Worked practice questions

What is the role of organic matter in soil?

  1. Reserving nutrients and so giving fertility
  2. Accelerating the breakdown of organic matter
  3. Improving the water infiltration rate
  4. Converting soil nitrogen into nitrate
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Correct answer: A. Reserving nutrients and so giving fertility

1. Organic matter is decayed plant and animal material held in the soil. 2. It stores plant nutrients and releases them gradually, which is what makes a soil fertile. 3. Water infiltration depends on soil porosity, a physical property, rather than on organic matter. 4. Breaking down organic matter is the work of soil micro-organisms, so that option swaps the roles round. 5. Converting nitrogen to nitrate is nitrification, carried out by bacteria and not driven by organic matter itself. _Source: NECTA CSEE 2021 Chemistry 032, Question 1: Multiple Choice, item (viii)_

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Fault the wrong roles

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Questions
  1. Question
    Three of these are not the role of organic matter in soil.
    Choices
    1. Item
      Reserving nutrients for fertility
      Correct
      Yes
    2. Explanation
      infiltration depends on soil porosity
      Item
      Controlling water infiltration
    3. Explanation
      micro-organisms do the breaking down
      Item
      Breaking down organic matter
    4. Explanation
      nitrification is carried out by bacteria
      Item
      Turning nitrogen into nitrate
Instructions
Three of these are not the role of soil organic matter. Fault each one.

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Organic matter or micro-organisms?

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Left
Organic matter
Items
  1. Region
    Organic matter
    Item
    Stores nutrients
  2. Region
    Organic matter
    Item
    Decayed matter
  3. Region
    Micro-organisms
    Item
    Breaks waste
  4. Region
    Micro-organisms
    Item
    Makes nitrate
  5. Region
    both
    Item
    Aids fertility
  6. Region
    both
    Item
    Found in soil
Right
Micro-organisms
Instructions
Tap a role, then what performs it. Some apply to both.

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