Question

Solve the following crossword puzzle by identifying the names of gases from the information given about them.

Across

3. The gas which is a major constituent of CNG used as fuel.

4. The gas which is the major constituent of earth's atmosphere.

5. A gas which is produced inside the sun by fusion reaction.

6. The gas found in stratosphere that absorbs harmful UV radiations from the sun and prevents them from reaching earth surface.

Down

1. A gas used for disinfecting water of swimming pool.
2. A gas used in advertisement signage displays that shows up a bright red colour when electricity is passed through it.

Answer 1

Across

3. Methane

4. Nitrogen

5. Helium

6. Ozone

Down

1. Chlorine
2. Neon

Explanation:

Acoss:

3. CNG is compressed natural gas, which is a mixture of hydrocarbons.It contain primarily methane and it also contain other hydrocarbons like ethane, butane, etc.

4. Atmosphere is a mixture of many gases and it contain primarily nitrogen (78%).

5. Helium is a noble gas.In stars nuclear fusion takes place where two hydrogen atoms fuse together and one helium is formed along with the emission of light.

6. Ozone is an allotrope of oxygen.It stays as a protective shield to our earth by preventing harmful UV rays to pass through.

Down:

1. Chlorine gas is used as a disinfectant of water.
2. Neon is a noble gas, used in advertisement signage displays that shows up a bright red colour when electricity is passed through it.