Air (Prevention and Control of Pollution) Act was amended in 1987 to include among pollutants:
1. Vehicular exhaust
2. Allergy causing pollen
3. Noise
4. Particulates of size 2.5 micrometer or below
According to the Central Pollution Control Board [CPCB] what size (in diameter) of particulate is responsible for causing greater harm to human health?
1. 3.5 micrometers
2. 2.5 micrometers
3. 4.0 micrometers
4. 3.0 micrometers
When domestic sewage mixes with river water:
1. | The increased microbial activity releases micro-nutrients such as iron. |
2. | The increased microbial activity uses up dissolved oxygen. |
3. | The river water is still suitable for drinking as impurities are only about 0.1%. |
4. | Small animals like rats will die after drinking river water. |
''Good ozone'' is found in the:
1. Ionosphere
2. Mesosphere
3. Troposphere
4. Stratosphere
Consider the following statements (A-D) about organic farming:
A. | Utilizes genetically modified crops like Bt cotton |
B. | Uses only naturally produced inputs like compost |
C. | Does not use pesticides and urea |
D. | Produces vegetables rich in vitamins and minerals |
Which of the above statements is correct?
1. (A) and (B) only
2. (B), (C) and (D)
3. (C) and (D) only
4. (B) and (C) only
A species that was introduced for ornamentation but has become a troublesome weed in India:
1. Parthenium hysterophorus
2. Eichhornia crassipes
3. Prosopis juliflora
4. Trapa Spinosa
If is absent in the atmosphere of the earth, then:
1. Temperature will decrease
2. Temperature will increase
3. Plants will flourish well
4. No effect
Besides CH4 and CO2, another green house gas is:
1. SO2
2. NH3
3. N2O
4. CFC
Temperature variation in Pacific ocean in present time is called:
1. Cyclone effect
2. El Nino effect
3. Greenhouse effect
4. Gaudikov's effect
Sewage purification is performed by:
1. Microbes
2. Fertilisers
3. Antibiotics
4. Antiseptics