The layer of atmosphere which extends up to 10 km from sea level is called
[D] None of these
Which one of the following is a secondary pollutant?
Which of the following is a primary pollutant?
[D] H2 SO4
Air pollutants that produce photochemical oxidants include,
[A] CO2, CO and SO2
[B] N2O. NO and HNO3
[C] O2 Cl2 and HNO3
[D] O3 Cl2 and SO2
The region containing water vapour is
Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?
Which one of the following statement is NOT true?
[A] Oxides of S, N and C are most widespread air pollutant.
[B] pH of drinking water should be between 5.5 and 9.5
[C] Concentration oI dissolved oxygen below 6 ppm is good for growth of fish.
[D] Clean water would have a BOD value of less than 5 ppm.
Smoke, dust, mist and dimes are
[A] non-viable in nature
[B] air borne particles
[C] dangerous for human health.
[D] Allot these.
The aromatic compound present as particulates is
[D] Polycyclic Aromatic Hydrocarbons
In which of the following regions hydrogen and helium are found?
Besides CO2 the other greenhouse gas is
UV radiations from sun cause a reaction that produces
Ozone hole refers to
[A] Increase In concentration of ozone
[B] hole in ozone layer
[C] reduction of thickness of ozone layer in stratosphere
[D] reduction ol thickness of ozone layer in troposphere
Carbon monoxide is a pollutant as it
[A] inactlves nerves
[B] inhibits glycolysis
[C] combines with oxygen
[D] com bines with haemoglobin
Spraying of DOT produces pollution of which type?
[B] Air and water
[C] Air and soil
[D] Air water and soil