Download App

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
Secondary sewage treatment is mainly a
  • A
    Chemical process
  • B
    Physical process
  • C
    Mechanical process
  • ✓
    Biological process
✓

Answer

Correct option: D.
Biological process
d
Secondary treatment of the liquid effluent from the primary settling tank is purely a biological treatment involving microbial activity

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (0.5 Marks)" from STD 12 - 8. microbes in human welfare→STD 12 - 8. microbes in human welfare — all question types→BIOLOGY STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

The idea that life originates from preexisting life is referred as:
→
Use of which of the following contraceptive device has increased in recent years due to its additional benefit of protecting the user from contracting $STDs$ and $AIDS$?
→
The measure taken up by India to overcome the problem of biopiracy is:
    →
    Damaged sieve tubes are sealed by deposition of
    →
    Which body of the Government of India regu- lates GM research and safety of introducing GM organisms for public services?
    →
    Which of the following is more close man
    →
    Occasionally a single gene may express more than are effect. The phenomenon is called :
    →
    The difference between $Spermiogenesis$ and $Spermiation$ is
    →
    Ovulation does not occur during pregnancy in the human female because
    →
    How many microspore mother cells will give rise to $256$ microspores after reduction division
    →