Environmental Chemistry Flashcards
Humans need _____ times more air than food
12-15
Troposphere extends to?
Stratosphere extends to?
~10km
10-50km
Low conc of SO2 causes ________ in humans. High conc of cause ________________ in plants.
asthma, bronchitis, emphysema
stiffness of flower buds
Higher concentrations of _______ damage the
leaves of plants and retard the rate of
photosynthesis
NO2
Hydrocarbons affect plants by
causing ageing, breakdown of tissues and shedding of leaves, flowers and twigs
Carboxyhaemoglobin is ___ times more stable than oxyhemoglobin.
When the concentration of carboxyhemoglobin
reaches about ______, the oxygen
carrying capacity of blood is greatly
reduced
300, 3-4%
Carbon dioxide gas is confined to __________ only
troposphere
About __% of the solar energy reaching the
earth is absorbed by the earth’s surface, which
increases its temperature. T
75
greenhouse gases are
methane, water vapour, nitrous oxide, CFCs and ozone
Increase in the global temperature increases the incidence of infectious diseases like
dengue, malaria, yellow fever, sleeping sickness etc.
Rainwater pH? Wb acid rain?
5.6, less than 5.6
Aerosol particles of oxides or ammonium salts in rain drops result in _________________.
SO2 is also absorbed directly on both solid and liquid ground surfaces and is thus deposited as ________.
Wet deposition
Dry deposition
‘Taj Trapezium’– an area that includes the towns of
Agra, Firozabad, Bharatpur and Mathura
Dust is composed of fine solid particles
over _____ in diameter
1um
Particulate pollutants bigger than ___ microns are likely to lodge in the nasal passage, whereas particles
of about ____ micron enter into lungs easily
5
1
