Decomposers in Nature MCQs Quiz Online PDF Download

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IGCSE biology practice test MCQ: after decomposition of household sewage, dried substance results in with choices sludge, fertilizer, land fill and all of these for online subjective aptitude tests, online learning, competitive exams with interesting topics preparation. Free study guide is for online learning decomposers in nature quiz test with MCQs to practice test questions with answers.

MCQs on Decomposers in Nature Quiz PDF Download

MCQ: After decomposition of household sewage, dried substance results in

  1. sludge
  2. fertilizer
  3. land fill
  4. all of these

D

MCQ: Before discharging decomposed sewage into rivers and seas,

  1. the water is filtered
  2. the pathogens are removed
  3. the pH of sewage is neutralized
  4. both A and B

D

MCQ: Inorganic gases released during decomposition include

  1. carbon dioxide
  2. hydrogen sulphide
  3. water vapors
  4. all of these

D

MCQ: Inorganic salts released during decomposition include

  1. nitrate
  2. suplhate
  3. phosphate
  4. all of these

D

MCQ: Biogas contains

  1. carbon monoxide
  2. carboxy acids
  3. methane
  4. ethane

C