What are pesticides and herbicides ? Explain giving examples.
Pesticides are a combination of two or more subtances. It is useful to destroy other insects like locusts and pests. e.g., Aldrin and Dieldrin anesthesizers are substance used to destroy weeds.
e.g., Sodium chlorate : $\mathrm{NaClO}_{3}$
Sodium Arsenate : $\mathrm{Na}_{3} \mathrm{ASO}_{3}$
Write name of the pollutant found in Troposphere.
Which are the atmospheric air pollutants ?
Write down the reactions involved during the formation of photochemical smog.
A large number of fish are suddenly found floating dead on a lake. There is no evidence of toxic dumping but you find an abundance of phytoplankton. Suggest a reason for the fish kill.
From where the biodegradeble wastes are generated ?