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 does not affect ozone layer?
Cl2
CH3Cl
NO
CFCl3
The water drops on the surface of glass in which ice cubes are placed is because of
Atmospheric Vapour
The glass itself
The ice cubes inside
None of above
Global warming is caused by
Nitrogen
Argon
Helium
Carbon dioxide
Smoking is injurious to health because it contains
Charcoal
Nicotine
Carcinogens
Carotene
The largest component of air is
Hydrogen
Oxygen
Skin forms the breathing organ of
Both earth worm and frog
Earth worm only
Both fish and frog
Frog only
The smallest unit of living matter.
Cells
Tissues
Organs
Plants
Which of the following is a biodegradable waste?
Radioactive wastes
Aluminium cans
DDT
Cattle dung
Which component of air remains the same in both exhaled and inhaled air?
Water content
