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STD 12 - 8. microbes in human welfare — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 8. microbes in human welfare1 Mark
MCQ
Identify the incorrect statement w.r.t. biogas plant
  • A
    It consists of a concrete tank, $10-15$ feet deep in which bio-wastes are collected and a slurry of dung is fed
  • ✓
    A floating cover is placed over the slurry, which keeps on rising as the gas is consumed in the tank
  • C
    It has an outlet, which is connected to pipe to supply biogas to nearby houses
  • D
    The spent slurry is removed and may be used as fertiliser
✓

Answer

Correct option: B.
A floating cover is placed over the slurry, which keeps on rising as the gas is consumed in the tank
b
A floating covers is placed over slurry which keeps on rising as the gas is produced in the tank due to microbial activity.

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