Chemistry MCQS for Class 10
Which one of the following is not air pollutants?
O2
CO
NO2
N2
Thermosphere lies beyond.
Troposphere
Stratosphere
Mesosphere
Biosphere
The formula of ozone is.
O
CO
O3
O2
About 99% of atmospheric mass lies in.
35 km
15 km
30 km
16 km
Acid rain affects the aquatic life by clogging fish gills because of:
Chromium metal
Mercury metal
Lead metal
Aluminium metal
Earth has natural systems.
Four
Three
One
Two
The recombination of O and O2 in mid stratosphere is an
None of these
Exothermic reaction
Endothermic reaction
Heat absorbing process
Forest fires and burning of wood emit.
Cl2
NO2
SO2
CO2
Ozone id beneficial for us as it:
absorbs air pollutants
absorbs infrared radiations
absorbs ultraviolet radiation
absorbs chlorofluorocarbons
About 99% atmosphere’s lies within:
15kilometre
11 kilometre
35 kilometre
30 kilometre
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