Multiple choice

Microorganisms use up the water's oxygen and release poisonous gases. Which of the following gases is a poisonous gas released by microorganisms present in water?

  1. Helium

  2. Ammonia

  3. Nitrogen

  4. Hydrogen

  5. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option. Ammonia is the poisonous gas released by microorganisms present in water after they use up the water's oxygen.