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Ecosanitation is
1. Sustainable system for handling human excreta
2. Sustainable system for handling agricultural wastes
3. Sustainable system for handling industrial effluents
4. Sustainable system for handling biomagnification

The raw material for making polyblend is
1. Bitumen
2. Plastic film waste
3. Recycled plastic
4. Any biodegradable waste

Integrated organic farming has been adopted in India by
1. Ramesh Chandra Dagar
2. Ahmed Khan
3. Panduranga Hegde
4. Amrita Devi

Algal bloom in a lake
1. Increases CO₂ level
2. Leads to oxygen depletion
3. Kills fishes
4. All of these

Most hazardous pollutant of automobile exhaust is
1. Mercury
2. Copper
3. Arsenic
4. Lead

Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of
1. Oxygen
2. Food
3. Light
4. Essential minerals

Acid rain is caused by increase in the atmospheric concentration of :
1. O₃ and dust
2. SO₂ and NO₂
3. SO₃ and CO
4. CO₂ and CO

Increase in concentration of the toxicant at successive trophic levels is known as:
1. Biogeochemical cycling
2. Biomagnification
3. Biodeterioration
4. Biotransformation

High value of BOD (Biochemical Oxygen Demand) indicates that
1. Consumption of organic matter in the water is higher by the microbes
2. Water is pure
3. Water is highly polluted
4. Water is less polluted

The UN Conference of Parties on climate change in the year 2011 was held in
1. Qatar
2. Poland
3. South Africa
4. Peru

A scrubber in the exhaust of a chemical industrial plant removes
1. Gases like sulphur dioxide
2. Particulate matter of the size 5 micrometer or above
3. Gases like ozone and methane
4. Particulate matter of the size 2.5 micrometer or less

 A location with luxuriant growth of lichens on the trees indicates that the
1. Trees are very healthy
2. Trees are heavily infested
3. Location is highly polluted
4. Location is not polluted

The zone of atomosphere in which the ozone layer is present is called
1. Ionosphere
2. Mesophere
3. Stratosphere
4. Troposphere

Global warming can be controlled by
1. Reducing reforestation, increasing the use of fossil fuel
2. Increasing deforestation , slowing down the growth of human population
3. Increasing deforestation, reducing efficiency of energy usage
4. Reducing deforestation, cutting down use of fossil fuel

The Air Prevention and Control of Pollution Act came into force in
1. 1981
2. 1985
3. 1990
4. 1975

 Kyoto Protocol was endorsed at
1. CoP - 5
2. CoP - 6
3. CoP - 4
4. CoP - 3

Which one of the following is a wrong statement?
1. Greenhouse effect is a natural phenomenon
2. Eutrophication is a natural phenomenon in freshwater bodies
3. Most of the forests have been lost in tropical areas
4. Ozone in upper part of atmosphere is harmful to animals

In an area where DDT has been used extensively. the population of birds declined significantly because
1. Cobras were feeding exclusively on birds
2. Many of the birds eggs laid, did not hatch
3. Birds stopped laying eggs
4. Earthworms in the area got eradicated

“Good ozone” is found in the
1. Stratosphere
2. Ionosphere
3. Mesosphere
4. Troposphere

Eutrophication is often seen in:
1. Mountains
2. Deserts
3. Fresh water lakes
4. Ocean

The two gases making highest relative contribution to the greenhouse gases are
1. CO₂ and N₂O
2. CO₂ and CH₄
3. CH₄ and N₂O
4. CFC₅ and N₂O

When domestic sewage mixes with river water
1. Small animals like rats will die after drinking river water
2. The increased microbial activity releases micronutrients such as iron
3. The increased microbial activity uses up dissolved oxygen
4. The river water is still suitable for drinking as impurities are only about 0.1%

dB is a standard abbreviation used for the quantitative expression of
1. A certain pesticide
2. The density of bacteria in a medium
3. A particular pollutant
4. The dominant Bacillus in a culture

 Global agreement in specific control strategies to reduce the release of ozone depleting substances, was adopted by:
1. The Montreal Protocol
2. The Koyoto Protocol
3. The Vienna Convention
4. Rio de Janeiro Conference

Steps taken by the Government of India to control air pollution include:
1. Compulsory PUC (Pollution Under Control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons.
2. Permission to use only pure diesel with a maximum of 500 ppm sulphur as fuel for 3. Use of non-polluting Compressed Natural Gas (CNG) only as fuel by all buses and trucks.
4. Compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel.

Biochemical Oxygen Demand (BOD) in a river water:
1. Has no relationship with concentration of oxygen in the water.
2. Gives a measure of Salmonella in the water.
3. Increases when sewage gets mixed with river water.
4. Remains unchanged when algal bloom occurs.

Chipko movement was launched for the protection of :
1. Forests
2. Livestock
3. Wet lands
4. Grasslands

DDT residues are rapidly passed through food chain causing biomagnification because DDT is:   
1. Moderately toxic
2. Non-toxic to aquatic animals
3. Water soluble
4. Lipo soluble

According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health?
1. 5.2 - 2.5
2. 2.5 or less
3. 1.5 or less
4. 1.0 or less

In which one of the following the BOD (Biochemical Oxygen Demand) of sewage (S), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order?
1. S < DE < PE < SE
2. SE < S < PE < DE
3. SE < PE < S < DE
4. PE < S < SE < DE

Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste water into natural surface water, is
1. < 3.0 ppm
2. < 10 ppm
3. < 100 ppm
4. < 30 ppm