Chemical Engineering :: Environmental Engineering
-
Pick out the wrong statement pertaining to 'green house' for the plants.
-
In water treatment, alum[Al2(SO4)3] is used for the process of
-
Pick out the one which is not a chemical coagulant.
-
Presence of iron and manganese in water causes
-
Septic tanks are used for the __________ of the deposited solids.
-
Death may occur, when SO2 concentration in atmospheric air exceeds __________ ppm.
-
Which of the following acts as a natural source of air pollution ?
-
Higher concentration of CO2 in atmosphere
-
Permissible safe limit (TLV) of __________ toxic gas is 100-1000 parts per million (ppm).
-
Radioactive substances present in the polluted water stream can be removed by
|
A.
'Green house' (made of glass) allows visible sunlight (i.e., short wavelength solar radiation like ultra-violet rays) to pass through the glass and heat up the soil thereby warming up plants inside it.
|
|
B.
The emitted longer wavelength radiation (e.g., infrared) is partly reflected and partly absorbed by the glass of the green house.
|
|
C.
'Green house effect' in earth's atmosphere is due to increasing CO2 level in atmosphere. where CO2 acts like the glass of 'green house' thereby warming up the earth's surface.
|
|
D.
'Green house' is colder than the outside atmosphere.
|
Whatsapp
Facebook
