Biology NEET Full Syllabus Mock Test 180 Questions New Syllabus Mock Test - 12 PCB Single Correct MCQ
Published on: August 14, 2026

Which of the following chiefly produced by the activity of an anaerobic bacteria on sewage

A
Laughing gas
B
Propane
C
Mustard gas
D
Marsh gas

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The correct answer is:
D

Marsh gas, also known as methane , is chiefly produced by the activity of anaerobic bacteria on sewage and in various natural environments like marshes and wetlands. Anaerobic bacteria are microorganisms that can survive and thrive in environments with little to no oxygen, and they play a significant role in the breakdown of organic matter, such as sewage, producing methane as a by product.

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