CBSE Questions for Class 12 Medical Biology Environmental Issues Quiz 15 - MCQExams.com

Depletion of the Ozone layer in the stratosphere is caused by.
  • Carbon monoxide
  • Hydrocarbons
  • Nitrogen dioxide
  • Polychloro-biphenyls
Ozone layer depletion is caused by
  • AFC's
  • BFC's
  • CFC's
  • DFC's
Electrostatic precipitators (ESP) are used to control
  • pesticide pollution
  • air pollution
  • radioactive pollution
  • water pollution
Some statements are given below each with one or two blanks. Select the option that correctly fills up the blanks.

(i)  High concentration of DDT disturbs_____ in birds, which causes______.
(ii)  _______ burns more efficiently as compared to petrol and diesel.
(iii)  ______ is the natural ageing of a lake which occurs due to accumulation of_______.
(iv)  ______ reduces the number of organisms which are sensitive to high temperature.
(v)  Irreparable computers and other electronic goods are known as _______.
  • (i) Calcium metabolism, thinning of eggshell (ii) CNG (iii) Eutrophication, nitrates and phosphates (iv) Thermal wastewater (v) Electronic waste
  • (i) Protein metabolism, thickening of eggshell (ii) CNG (iii) Eutrophication, nitrates and phosphates (iv) Thermal wastewater (v) Electronic waste
  • (i) Calcium metabolism, thinning of eggshell (ii) Coal (iii) Biomagnification, nitrates and phosphates (iv) Organic wastewater (v) Inorganic waste
  • (i) Calcium metabolism, thickening of eggshell (ii) CNG (iii) Biomagnification, DDT and mercury (iv) Thermal wastewater (v) Electronic waste
Accelerated eutrophication occurs due to?
  • Increase in amount of dissolved oxygen.
  • Disposal of waste rich in nitrates and phosphates.
  • Increase in concentration of DDT and mercury in water.
  • Unsafe disposal of radioactive wastes.
Kyoto protocol is a multination international treaty for
  • phasing out greenhouse gases
  • controlling ozone destroying substances
  • management of hazardous wastes
  • conservation of biodiversity
When there is depletion of ozone in the stratosphere the wavelength of radiation striking the earth's surface will be ............
  • $$10^{-2}$$ m
  • $$10^{-7}$$ m
  • $$10^{-10}$$ m
  • 100 m
Particulate and gaseous pollutants along with harmless gases are released from the thermal power plants. Name the most widely used device of removing particulate pollutants from the air.
  • Electrostatic precipitator
  • Fabric filters
  • Cyclone separators
  • None of the above
Which of the following methods of waste management produce energy?
  • Biomedical waste management
  • Safe landfill sites
  • Industrial solid waste management
  • Pyrolysis
Which of the following are main responsible for ozone depletion?
  • Chlorofluorocarbons
  • Hydrocarbons
  • Carbon monoxide
  • Carbon dioxide
The pollutant that causes hole in the ozone layer is
  • $$SF_{6}$$
  • nitrousoxide
  • $$CFC_{s}$$
  • $$PFC_{s}$$
In 2015 and 2017, there was very heavy rain in our state. In 2016, there was no adequate rain. These extreme conditions are due to
  • Uneven distribution of human population
  • Global warming
  • Depletion of ground water
  • Ozone depletion
_____________ is the first country to have phased out the CFCs and HCFCs which are responsible for the depletion of the ozone layer
  • Denmark
  • Germany
  • France
  • Spain
Snow blindness is caused due to 
  • Global warming
  • Ozone depletion
  • Greenhouse effect
  • Bio magnification
Ultraviolet radiation which is not lethal but harm to the organism is
  • 0.1-0.28
  • 0.28-0.32
  • 0.32-0.4
  • 0.4-0.5
The earth's radiation is often referred to as __________ radiation, while the sun's radiation is often referred to as ___________ radiation.
  • Shortwave, longwave
  • Shortwave, shortwave
  • Longwave, shortwave
  • Longwave, longwave
Ideal conditions for a strong radiation inversion:
  • Clear, calm, dry, winter night
  • Clear, calm, moist, summer night
  • Cloudy, calm, moist, winter night
  • Cloudy, windy, moist, summer night
Melanornia (skin cancer) is associated with
  • ozone accumulation
  • ozone depletion
  • acid rain
  • allergens
The planet with a strong greenhouse effect, whose surface temperature averages $$480^{o}C$$ $$(900^{o}F)$$ is :
  • Earth
  • Venus
  • Mars
  • Pluto
What gases are involved in ozone depletion?
  • Nitrogen
  • Chlorine and Bromine
  • Chlorofluorocarbons (CFCs) and Ozone Depleting Substances (ODS)
  • Both B and C
What does a single chlorine free radical destroy?
  • Ultraviolet radiations
  • Atmosphere
  • Biosphere
  • Ozone layer
The indoor pollutant radon which is a radioactive gas causes
  • lung cancer
  • anemia
  • hormone disorder
  • cardiac arrest
Free radicals of bromine are more destructive than _______ in case of ozone depletion.
  • Carbon
  • Chlorine
  • Phosphorous
  • Nitrogen
Which of the following is depleted by CFCs?
  • Atmosphere
  • Ozone Layer
  • Biosphere
  • Hydrosphere
How long does an acid airborne form in atmosphere?
  • 6 to 7 days
  • 2 to 5 days
  • 1 to 2 days
  • 5 to 6 days
What causes effects of ozone layer?
  • Alpha Radiations
  • Ultraviolet Radiations
  • Gamma radiations
  • Beta Radiations
Organic pollutants are discharged as a municipal sewage and
  • Industrial effluents
  • Mining Pollution
  • Natural pollution
  • Artificial Pollution
Waste which arise from household, institutions, markets and other activities is known as
  • Industrial Waste
  • Municipal Waste
  • Hazardous Waste
  • Solid waste
The ozone hole over Antarctica was discovered in the
  • 1955
  • 1965
  • 1970
  • 1985
Which source of air pollution has a large stationary source?
  • Point Source
  • Area Source
  • Line Source
  • Mobile Source
In pulverization, volume and physical characteristics of solid waste are
  • Not Changed
  • Changed
  • Remain constant
  • unstable
Material produced by weathering accumulates in ?
  • Sedimentary Rocks
  • Depositional basins
  • Basins
  • Igneous rocks
Which chemical is a 'ozone' depleting solvent?
  • PAN
  • CFCs
  • Carbon tetrachloride
  • Nitrogen
'HCFCs' can be used in refrigerants instead of
  • $$CO_{2}$$
  • Chlorine
  • CFCs
  • $$O_{2}$$
HCs are thermodynamically not stable towards
  • Acidification
  • Decomposition
  • Reduction
  • Oxidation
Chlorine free radical reacts with 'ozone' to form _______.
  • CFCs
  • Chlorine oxide
  • $$N_{2}$$
  • Bromine oxide
Scientists predicted, ecosystem would adversely affected by
  • Global Warming
  • Urbanization
  • Deforestation
  • Acid deposition
What does solid waste consist?
  • Mud
  • Sand
  • dust
  • All of above
What does total solid include?
  • Total Solid Waste
  • Total Dissolved Solids
  • Total Suspended Solids
  • Both b and c
'Human activities' are playing main role in causing;
  • Acid deposition
  • Global warming
  • Deforestation
  • Urbanization
What is involved in ozone depletion?
  • Chlorofluorocarbons (CFCs)
  • Carbon tetrachloride (CCl4)
  • Carbon tetrafluoride (CF4)
  • All of above
Tropospheric ozone harmful effects on humans, included:
  • Chest pain
  • Throat irritation
  • Vomiting
  • Both A and B
Which among the following alkane has largely replaced the ozone layer-depleting halomethanes in household refrigerators and freezers?
  • Methane
  • Propane
  • Butane
  • Ethane
The hydrochlorofluorocarbons (HCFCs) are the compounds that have the following molecules: hydrogen, carbon, chlorine, fluorine. Which among the above plays the most important role in ozone depletion?
  • Hydrogen
  • Carbon
  • Chlorine
  • Flourine
At which of the following places First Global Conference on depletion of Ozone layer was held?
  • Geneva
  • Vienna
  • London
  • Frankfurt
'Nitric acid' reacts with ozone, resulting in the production of __________.
  • $$O_3$$
  • CO
  • $$CO_2$$
  • $$NO_2$$
Which among the following gas is used as reference to calculate "Global Warming Potential (GWP)"?
  • Carbon Dioxide
  • Methane
  • Ozone
  • Nitrogen Di-oxide
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