Q. No.
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
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. |
1. Durban
2. Bali
3. Doha
4. Cancun
1. Decreasing amount of atmospheric oxygen
2. Increasing amount of atmospheric carbon dioxide
3. Decreasing amount of atmospheric carbon dioxide
4. Increasing concentration of atmospheric oxygen
1. It can cause respiratory problems
2. It can directly enter into our circulatory system
3. It can cause inflammation and damage to the lungs
4. It can be inhaled into the lungs
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
Photochemical smog pollution does not contain:
1. ozone
2. nitrogen dioxide
3. carbon dioxide
4. PAN (Peroxy Acyl Nitrate)
Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year:
1. 1986
2. 1987
3. 1988
3. 1985
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
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