Q. No.Photochemical smog pollution does not contain:
1. ozone
2. nitrogen dioxide
3. carbon dioxide
4. PAN (Peroxy Acyl Nitrate)
The limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal wastewater into natural surface water is:
1. < 3.0 ppm
2. < 10 ppm
3. < 100 ppm
4. < 30 ppm
Which of the following methods is the most suitable for the disposal of nuclear waste?
| 1. | Bury the waste within rocks, deep below the earth's surface |
| 2. | Shoot the waste into the space |
| 3. | Bury the waste under the Antarctic ice-cover |
| 4. | Dump the waste within rocks, under deep ocean |
Which of the following pairs of gases is mainly responsible for green house effect?
1. Carbon dioxide and methane
2. Ozone and Ammonia
3. Oxygen and Nitrogen
4. Nitrogen and Sulphur dioxide
Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for:
1. making tubes and pipes
2. making plastic sacks
3. use as a fertilizer
4. construction of roads
Which of the following protocols did aim for reducing the emission of chlorofluorocarbons into the atmosphere?
1. Geneva protocol
2. Montreal protocol
3. Kyoto protocol
4. Gothenburg protocol
Assertion: During green revolution, crop production is increased.
Reason: Deforestation is one of the method of green revolution to increases productivity.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Ultrasound of how much frequency is beamed into a human body for sonography?
1. 30-40 MHz
2. 15-30 MHz
3. 1-15 MHz
4. 45-70 MHz
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 |
Fill up the blanks:
i. In a scrubber, the exhaust is passed through a spray of _______.
ii. According to Central Pollution Control Board , particulate size _________ or less in diameter are responsible for causing the greatest harm to human health.
iii. Electrostatic precipitator, which can remove __________ present in the exhaust from a thermal power plant.
iv. As the exhaust passes through the catalytic converter, unburnt hydrocarbons are converted into carbon dioxide and ______.
i ii iii iv
1. Lime 2.8 micro-meters Gases like sulphur dioxide Hydrogen
2. Kerosene 2.5 micro-meters Gases like sulphur dioxide Water
3. Lime 2.5 micro- meters Over 99 per cent Water
particulate matter
4. Kerosene 2.8 micro- meters Over 99 per cent Hydrogen
particulate matter
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