Decomposers in Nature MCQs Quiz Online PDF Book Download

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MCQ on Decomposers in NatureQuiz Book 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. sulfate
  3. phosphate
  4. all of these

D

MCQ: Biogas contains

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

C