SCIENCE

What is the meaning of CNG

• Compressed natural gas

• Common natural gas

• Common natural gasoline

• None of the above

Composition of carbon dioxide in the air

• 0.02 percent

• 1 percent

• 0.08 percent

• 0.03 percent

The gas need for burning

What are three state of matter

• Solid liquid gases

• Nitrogen oxygen hydrogen

• Plant human water

• No one

Composition of Nitrogen in the air

• 21%

• 78%

• 77%

• 81%

Air is a mixture of gas.true or false

Layer of air around the earth is known as

• Hydrosphere

• Lithosphere

• Atmosphere

• Biosphere

Composition of oxygen present in the air

• 21%

• 26%

• 20%

• None of the above