Question : Which of the following molecules or ions involved in the nitrogen cycle do not contain oxygen atoms?
Option 1: Nitrite
Option 2: Ammonia
Option 3: Nitrate
Option 4: Laughing gas
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Correct Answer: Ammonia
Solution : The correct answer is Ammonia.
Chemically, ammonia has one atom of nitrogen and three atoms of hydrogen. It is chemically abbreviated as NH3. So, it does not contain any oxygen atoms. Ammonia is a colourless gas with a sharp, pungent, and suffocating smell. Ammonification is the process in the nitrogen cycle in which various bacteria, and prokaryotes disintegrate the nucleic acids present in dead, and decaying matter, and release ammonia in the soil.
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Question : Chile saltpetre is the common name of
Option 1: Sodium Nitrate
Option 2: Potassium Nitrite
Option 3: Potassium Nitrate
Option 4: Sodium Nitrite
Question : When Lead nitrate is heated, which of the following gases is produced?
Option 1: Nitrogen oxide
Option 2: Lead dioxide
Option 3: Nitrogen dioxide
Option 4: Lead oxide
Question : Which one of the following mineral does not contain oxygen?
Option 1: Haematite
Option 2: Bauxite
Option 3: Cryolite
Option 4: Calcite
Question : Which of the following steps is not involved in a water cycle?
Option 1: Hydration
Option 2: Condensation
Option 3: Precipitation
Option 4: Evaporation
Question : Which one of the following elements is an example of noble gas?
Option 1: Nitrogen
Option 2: Hydrogen
Option 3: Chlorine
Option 4: Helium
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