Which of the following does not affect ozone layer?
Cl2
CH3Cl
NO
CFCl3
The largest component of air is
Hydrogen
Oxygen
Nitrogen
Carbon dioxide
Which of the following statement is wrong about ozone layer?
A well marked ozone layer is present in the stratosphere
Ozone layer damage the human body and causes inflammatory diseases.
Ozone layer absorbs the harmful ultraviolet rays of the sun.
Ozone layer act as a protective shield.
Which is the protective covering to the earth and its living beings?
Ozone
During photosynthesis, plants absorb___________ and watervapour.
Carbondioxide
Natural gas
Global warming is caused by
Argon
Helium
The gas emitted when fossil fuels are burnt
Chloroflurocarbons.
Atmosphere has ______________________ % of nitrogen.
78%
0.03%
99%
50%
Which component of air remains the same in both exhaled and inhaled air?
Water content
Global warming is the Increased level of
carbondioxide
