Chipko movement was launched for the protection of:
1. grasslands
2. forests
3. livestock
4. wet lands
DDT residues are rapidly passed through food chain causing biomagnification because DDT is:
1. lipo soluble
2. moderately toxic
3. non-toxic to aquatic animals
4. water soluble
Steps taken by the Government of India to control air pollution include:
1. | compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel |
2. | compulsory PUC (Pollution Under Control) certification of petrol driven vehicles, which tests for carbon monoxide and hydrocarbons |
3. | permission to use only pure diesel with a maximum of 500 ppm Sulphur as fuel for vehicles |
4. | use of non-polluting Compressed Natural Gas(CNG) only as fuel by all buses and trucks |
Montreal protocol aims at:
1. reduction of ozone depleting substances
2. biodiversity conservation
3. control of water pollution
4. control of CO2 emission
Biochemical Oxygen Demand (BOD) in river water:
1. | remains unchanged when algal bloom occurs |
2. | has no relationship with the concentration of oxygen in the water |
3. | gives a measure of Salmonella in the water |
4. | increases, when sewage gets mixed with river water |
Global agreement in specific control strategies to reduce the release of ozone-depleting substance was adopted by:
1. Rio de Janeiro Conference
2. The Montreal Protocol
3. The Kyoto Protocol
4. The Vienna Convention
A lake near a village suffered heavy mortality of fish within a few days. Consider the following reasons for this:
1. | Lots of urea and phosphate fertilizer were used in the crops in the vicinity. |
2. | The area was sprayed with DDT by an aircraft. |
3. | The lake water turned green and stinky |
4. | Phytoplankton populations in the lake declined initially, thereby, greatly reducing photosynthesis. |
Which two of the above were the main causes of fish mortality in the lake?
1. 2, 3
2. 3, 4
3. 1, 3
4. 1, 2
1. 2.5 or less
2. 1.5 or less
3. 1.0 or less
4. 5.2 or 2.5
Which one of the following statements is correct?
1. | Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies |
2. | Both Azotobacter and Rhizobium in root nodules of plants |
3. | Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and potassium for plant nutrition in the soil |
4. | At present it is not possible to grow maize without chemical fertilizers |
1. Jatropha
2. Azadirachta
3. Musa
4. Aegilops