AIR

Gap-fill exercise

  
Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Air contains nitrogen.

We breath in oxygen and breath out .

Industries and vehicles release gases like and sulpher dioxide into the atmosphere.

Third most abundant element after Hydrogen and Helium in the universe is .

is a non-combustible gas as it does not burn on its own.

Non metallic oxides are generally in nature.

Hydrocarbons react with oxygen to form and water vapour.

The process of conversion of iron into its hydrated form of oxide in the presence of air and moisture is called .

Nitrogen is the most abundant element in the human body by mass.

Nitrogen is neither combustible nor a of combustion.

is used as a refrigerant.

is used for filling the space above mercury in high temperature thermometer to reduce the evaporation of mercury.

CO2 used in manufacturing sodium carbonate by process.

CO2 is used along with ammonia in the manufacture of fertilizers like .

Melting of ice cap and glaciers takes place due to .

Reduction in the use of fossil fuels is a measure to prevent .

irritates eyes and skin of human beings.

Acid rain changes the fertility of the , destroys plants and aquatic life.

The green house gases are CO2, , CH4, CFC (Chlorofluoro carbon) etc.