Atmosphere has ______________________ % of nitrogen.
78%
0.03%
99%
50%
Global warming is the Increased level of
carbondioxide
Hydrogen
Helium
Nitrogen
Which of the following does not affect ozone layer?
Cl2
CH3Cl
NO
CFCl3
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 of the following is a biodegradable waste?
Radioactive wastes
Aluminium cans
DDT
Cattle dung
During photosynthesis, plants absorb___________ and watervapour.
Carbondioxide
Oxygen
Natural gas
Skin forms the breathing organ of
Both earth worm and frog
Earth worm only
Both fish and frog
Frog only
The largest component of air is
Carbon dioxide
Smoking is injurious to health because it contains
Charcoal
Nicotine
Carcinogens
Carotene
Global warming is caused by
Argon
