Which of the following does not affect ozone layer?
Cl2
CH3Cl
NO
CFCl3
Global warming is the Increased level of
carbondioxide
Hydrogen
Helium
Nitrogen
The largest component of air is
Oxygen
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.
During photosynthesis, plants absorb___________ and watervapour.
Carbondioxide
Natural gas
Skin forms the breathing organ of
Both earth worm and frog
Earth worm only
Both fish and frog
Frog only
Atmosphere has ______________________ % of nitrogen.
78%
0.03%
99%
50%
The smallest unit of living matter.
Cells
Tissues
Organs
Plants
The gas emitted when fossil fuels are burnt
Chloroflurocarbons.
Global warming is caused by
Argon
