Biology NEET - XII: Chapter 16- Environmental Issues
The Environmental Protection Act was passed in 1986 by the Government of India. It serves as an umbrella legislation aimed at protecting and improving the environment, as well as preventing hazards to humans and other living beings.
When was the Environmental (protection) Act passed?
1986
Key Terms
When was the Environmental (protection) Act passed?
1986
Should the velocity of the air passing through electrostatic precipitator be low or high?
It should be low enough to allow the dust to fall
According to _____________ particulate size 2.5micrometers or less in diameter (PM 2.5) are responsible for causing the greatest harm to human health.
Central Pollution Control Board (CPCB)
When did the Air (Prevention and Control of Pollution) Act come into force?
1981
When was the Air (Prevention and Control of Pollution) Act amended to include noise as an air pollutant?
1987
In 1991, which position did Delhi grab in the list of the 41 most polluted cities of the world?
4th
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| Term | Definition |
|---|---|
When was the Environmental (protection) Act passed? | 1986 |
Should the velocity of the air passing through electrostatic precipitator be low or high? | It should be low enough to allow the dust to fall |
According to _____________ particulate size 2.5micrometers or less in diameter (PM 2.5) are responsible for causing the greatest harm to human health. | Central Pollution Control Board (CPCB) |
When did the Air (Prevention and Control of Pollution) Act come into force? | 1981 |
When was the Air (Prevention and Control of Pollution) Act amended to include noise as an air pollutant? | 1987 |
In 1991, which position did Delhi grab in the list of the 41 most polluted cities of the world? | 4th |
According to Euro III laws, in diesel and petrol sulphur should be controlled at | Diesel- 350 ppm Petrol- 150 ppm |
According to Euro III laws aromatic hydrocarbons should be contained at what percent of the concerned fuel? | 42% |
When was the Water (Prevention and Control of Pollution) Act passed? | 1974 |
Which metals are characterised as heavy metals? | Metals with density greater than 5 gm/(cm^3) |
In Arcata, biologists developed a series of six connected marshes over ____ hectares of marshland. | 60 hectares |
Which institutions did Ahmed Khan collaborate with to blends of polyblend and bitumen which enhanced the bitumen’s water repellant properties? | R.V College of Engineering and Bangalore city corporation. |
Clouds and gas reflect about (1)_ of the incoming solar radiation and absorb some of it, but almost (2) of incoming solar radiation falls on Earth’s surface heating it. | (1) - one fourth (2) - half |
WHat percent of the total green house gases consists of carbon dioxide. | 60% |
WHat percent of the total green house gases consists of N2O? | 6% |
WHat percent of the total green house gases consists of methane? | 20% |
WHat percent of the total green house gases consists of CFCs? | 14% |
During the past century, the temperature of the earth has increased by | 0.6°C |
In which units is the thickness of the ozone layer measured? | Dobson units (DU) |
Inflammation of cornea due to UV-B is also known as | Snow blindness |
UV-C damages DNA and mutation may occur. True/false? | False. UV-B damages DNA and mutation may occur. |
When was the Montreal protocol signed and for what? | 1987, regarding ozone depletion |
In the beginning of the twentieth century, forests covered about (1) percent of the land of India. By the end of the centurey, it shrunk to (2) per cent. | (1) - 30% (2) - 19.4% |
Thr National Forest Policy of India has recommended (1) percent forest cover for plains and (2)_ for hills. | (1) - 33% (2) - 67% |
When and where did Chipko movement occur? | In Garhwal Himalayas, 1974 |
When was the concept of joint forest management introduced in India? | 1980s |
Is DDT a primary pollutant or a secondary pollutant? | Primary pollutant |
Is benzyl hexachloride (BHC) a primary pollutant or a secondary pollutant? | Primary pollutant |
Is ozone a primary pollutant or a secondary pollutant? | Secondary |
Is PAN ( peroxyacyl nitrate) a primary pollutant or a secondary pollutant? | Secondary |
The formation of secondary pollutants by the action of one or more primary pollutants is called | Synergism |
Which are the most harmful gaseous pollutants? | sulphur dioxide, sulphur trioxide |
TOxicity of copper in humans can cause | Hypertension and uremia |
Which isotope of strontium is carcenogenic? | Sr-90 |
Which isotope of iodine is carcenogenic? | I-131 |
Which smog is also known as Los Angeles smog? | Photochemical smog |
Which smog is also known as London smog? | Sulfur smog |
What are the component of photochemical smog? | Smoke+fog+ oxides of nitrogen +hydrocarbons+ UV light+PAN+ozone |
Which smog is caused due to high temperature? | Photochemical smog |
Which smog is caused due to low temperature? | Sulfur smog |
What are the component of sulfur smog? | Smoke + fog + S + coal + vapours of sulphuric acid |
What is the effect of PAN in plants? | Inhibits photolysis of water during photosynthesis, inhibit chlorophyll formation and PSII |
Bhopal gas tragedy occurred due to the accidental leakage of | Methyl isocyanide and phosgene |
Which radioactive element does tobacco smoke contain? | Polycyclic radioactive polonium (P-210) |
Sound is categorized as noise at how many decibels? | 80 dB |
What is maximum permitted sound in resedential zone in day? | 65 dB |
What is the maximum permitted sound in silence zone in day? | 50 dB |
Minamata disease is caused due to | mercuric poisoning |
Cadmium poisoning in humans can cause | Itai-itai disease |
Blue baby syndrome is caused due to | nitrate poisoning |
Dissolved oxygen content of water is measured using | Oxymeter |
Positive soil pollution is caused due to | Addition of pollutants in soil |
Negative soil pollution is caused due to | Washing away of top soil |
What is known as carbon dioxide fertilisation effect? | Increase in rate of photosynthesis because of increase in carbon dioxide concentration |
El Nino happens over which ocean? | Pacific ocean |
Kyoto protocol is related to which environmental issue? | Climatic change and greenhouse gases |
The ozone hole is present over which region of earth? | Antarctic region |