Earth is protected from U.V radiation by
Troposphere
Ozone layer
Co2 layer
Oxygen layer
The major cause of ozone layer depletion is the use of
Sulfur compound
CFCs
Plastic
Medicine
A catalyst used in the preparation of oxygen from H2O2 is
MnO2
CaO2
H2O
H2S
A thin layer that connect the earth atmosphere with the space
Thermosphere
Stratosphere
Exosphere
Ionosphere
The acid rain does not occur by
Sulphuric acid
Nitric acid
Sulfurous acid
Acetic acid
Which of the following is a main air pollutant
Co2
N2
No2
Co
Co2 gas is
Lighter than air
Heavier than air
Neither lighter nor heavier
None of these
Baking powder is
Sodium bicarbonate
Sodium carbonate
Calcium bicarbonate
Calcium carbonate
