Microbes in production of biogas — NEET Biology Questions

Practice 54 questions on Microbes in production of biogas from Microbes in human welfare (NCERT Class 12, Chapter 8). Free samples below — get all 54 in the app.

54 Questions Microbes in human welfare Class 12

Sample Questions — Microbes in production of biogas

Try 5 questions below from Microbes in production of biogas. Get all 54 in the MedicNEET app.

MCQ
Which component of the biogas plant is responsible for gas collection?
  • A. Inlet pipe
  • B. Digester
  • C. Gas tank
  • D. Slurry outlet
✅ Correct Answer: C
The gas formed during anaerobic digestion rises into the tank above the digester.
MCQ
Cattle dung is commonly known as:
  • A. Gobar
  • B. Silage
  • C. Manure
  • D. Humus
✅ Correct Answer: A
'Gobar gas' is biogas generated from cattle dung.
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MCQ
Methanogens are found in the rumen of:
  • A. Poultry
  • B. Fishes
  • C. Ruminants
  • D. Amphibians
✅ Correct Answer: C
Methanogens help in cellulose digestion in rumens and produce methane.
MCQ
Which of the following statements about methanogens is/are correct? I. Present in rumen of cattle II. Capable of digesting cellulose III. Produce methane in aerobic conditions IV. Used in gobar gas plants
  • a) I and III only
  • b) I, II and III only
  • c) I, II and IV only
  • d) I, II, III and IV
✅ Correct Answer: C
Methanogens are strict anaerobes that digest cellulose and generate methane.
MCQ
Methanogens are strict anaerobes. Which one of the following would reduce biogas yield the most?
  • A. Excess cow dung
  • B. Increase in temperature
  • C. Use of spent slurry
  • D. Entry of oxygen into digester
✅ Correct Answer: D
Oxygen inhibits methanogens; they require oxygen-free conditions.

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