Undesirable change in physical, chemical and biological characteristics of air, water, land and soil. | Card: 2 / 50 |
Which gas causes giddiness, headache and cardiovascular malfunction? | Card: 5 / 50 |
Fill in the blank: ESP can remove about _____ of particulate matter from thermal power plants. | Card: 7 / 50 |
Nitric oxide splits into nitrogen and oxygen, carbon monoxide oxidises to carbon dioxide. | Card: 10 / 50 |
Because leaded petrol inactivates the catalyst, making the convertor ineffective. | Card: 12 / 50 |
Riddle: I burn efficiently, leave no remains, and cannot be stolen easily. What fuel am I? | Card: 13 / 50 |
Which act includes noise as an air pollutant? | Card: 17 / 50 |
Fill in the blank: _____ is the increase in toxicant concentration at successive trophic levels. | Card: 21 / 50 |
Biological magnification is the increase in toxicant concentration at successive trophic levels. | Card: 22 / 50 |
DDT disturbs calcium metabolism, causing egg shell thinning and declining bird populations. | Card: 24 / 50 |
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Biochemical Oxygen Demand measures oxygen required for microbial breakdown of organic matter. | Card: 26 / 50 |
Which aquatic plant is called 'Terror of Bengal'? | Card: 29 / 50 |
Conventional sedimentation-filtration-chlorine treatment, then biological purification using marsh organisms. | Card: 32 / 50 |
Fill in the blank: Ecosan toilets recycle human excreta into _____ to reduce chemical fertiliser needs. | Card: 33 / 50 |
True. This recycled plastic-bitumen mixture enhances water repellant properties. | Card: 40 / 50 |
Which farming method follows zero-waste cyclical processes? | Card: 41 / 50 |
B) Organic farming uses cyclical, zero-waste methods maximising resource utilisation. | Card: 42 / 50 |
Excessive use of inorganic fertilisers, pesticides and chemical seepage from industries. | Card: 44 / 50 |
Fill in the blank: Radioactive wastes are buried _____ meters deep below earth's surface. | Card: 45 / 50 |






