| 2341 |
The standard BOD test measures oxygen consumed by microbes over: |
Environmental Studies
Water pollution |
Medium |
| 2342 |
A 10 mL water sample is diluted to 300 mL. DO falls from 8.0 mg/L to 5.0 mg/L in the BOD test. The BOD of the… |
Environmental Studies
Water pollution |
Hard |
| 2343 |
For the same water sample, COD is generally higher than BOD because: |
Environmental Studies
Water pollution |
Medium |
| 2344 |
The presence of coliform bacteria such as E. coli in drinking water indicates: |
Environmental Studies
Water pollution |
Easy |
| 2345 |
The two nutrients mainly responsible for eutrophication of lakes are: |
Environmental Studies
Lakes and eutrophication |
Easy |
| 2346 |
The warm upper layer of a thermally stratified lake is called the: |
Environmental Studies
Lakes and eutrophication |
Medium |
| 2347 |
In a eutrophic lake, fish die mainly because: |
Environmental Studies
Lakes and eutrophication |
Medium |
| 2348 |
Compared with a eutrophic lake, an oligotrophic lake typically has: |
Environmental Studies
Lakes and eutrophication |
Easy |
| 2349 |
Lakes in cold regions freeze from the top down and aquatic life survives below because: |
Environmental Studies
Lakes and eutrophication |
Hard |
| 2350 |
In a jar (sedimentation) test, which soil fraction settles to the bottom first? |
Environmental Studies
Soil pollution |
Easy |
| 2351 |
Which soil type has the highest water-holding capacity? |
Environmental Studies
Soil pollution |
Easy |
| 2352 |
100 g of oven-dry soil weighs 140 g after it is soaked and allowed to drain. Its water-holding capacity is: |
Environmental Studies
Soil pollution |
Medium |
| 2353 |
Which material is commonly added to correct acidic soil? |
Environmental Studies
Soil pollution |
Medium |
| 2354 |
The polluted liquid that seeps out of a waste dump and can contaminate soil and groundwater is called: |
Environmental Studies
Soil pollution |
Hard |
| 2355 |
Which of these is a push factor for rural-to-urban migration? |
Environmental Studies
Urbanisation |
Easy |
| 2356 |
According to Census 2011, roughly what share of India’s population lived in urban areas? |
Environmental Studies
Urbanisation |
Medium |
| 2357 |
The “urban heat island” effect means that: |
Environmental Studies
Urbanisation |
Easy |
| 2358 |
For a settlement to be a census town in India, at least what share of its male main workers must be in non-ag… |
Environmental Studies
Urbanisation |
Hard |
| 2359 |
The UN World Urbanization Prospects 2018 projected that by 2050 the share of the world’s population living in… |
Environmental Studies
Urbanisation |
Medium |
| 2360 |
The 1972 report The Limits to Growth, which warned that endless growth on a finite planet could lead to colla… |
Environmental Studies
Critique of conventional development |
Medium |