Which is always present in photochemical smog?
O3
CO2
SO2
CH4
A.
O3
Photochemical smog occurs at high temperature due to stull air, emission of nitrogen oxides and hydrocarbons. Nitrogen dioxide (NO2) splits into nitric oxide and nascent oxygen.
Nascent oxygen combines with molecular oxygen to form ozone. This further reacts with hydrocarbons to form aldehydes and ketones.
NO2, O2 and ketones combine to form Peroxy Acyl Nitrates (PAN) which is responsible for eye irritation. Therefore, first reported in Los Angeles, so called Los Angeles Smog.
Classical (London) Smog was reported in London. It occurs at low temperature which contains sulphur gases, smoke and dust particles.
The Montreal Protocol refers to
Persistent organic pollutants
Global warming and climate change
Substances that deplete the ozone layer
Biosafety of genetically modified organisms
Which of the following bio-engineered bacteria is utilized for cleaning of marine oil slicks?
Escherichia coli
Pseudomonas syringae
Pseudomonas putida
Rhizoctonia solani
In a cola fired power plant, electrostatic precipitators are installed to control emission of
SO2
NOx
SPM
CO
A lake with an inflow of domestic sewage rich in organic waste may result in
Drying of the lake very soon due to algal bloom
An increased production of fish due to lot of nutrients
Death of fish due to lack of oxygen
Increased population of the aquatic food web organisms
Ozone depletion in staratosphere would result in
forest fires
global warming
skin cancer incidence
None of the above
Besides dung, the weed that can be used in biogas production is
Hydrilla
Solanum- nigrum
Eichhornia Crassipes
Parthenium hysterophorus
