Env, Environment, UPSC PYQ

1

Consider the following kinds of organisms: (1) Copepods (2) Cyanobacteria (3) Diatoms (4) Foraminifera Which of the above are primary producers in the food chains of oceans?

1 and 2

2 and 3

3 and 4

1 and 4

2

Which one of the following is a filter feeder?

Catfish

Octopus

Oyster

Pelican

3

Why is there a concern about copper smelting plants? (1) They may release lethal quantities of carbon monoxide into environment. (2) The copper slag can cause the leaching of some heavy metals into environment. (3) They may release sulphur dioxide as a pollutant. Select the correct answer using the code given below:

1 and 2 only

2 and 3 only

1 and 3 only

1, 2 and 3

4

Which of the following are the reasons/factors for exposure to benzene pollution?
(1) Automobile exhaust
(2) Tobacco smoke
(3) Wood burning
(4) Using varnished wooden furniture
(5) Using products made of polyurethane
Select the correct answer using the code given below:

1, 2 and 3 only

2 and 4 only

1, 3 and 4 only

1, 2, 3, 4 and 5

5

Magnetite particles, suspected to cause neurodegenerative problems, are generated as environmental pollutants from which of the following? (1) Brakes of motor vehicles (2) Engines of motor vehicles (3) Microwave stoves within homes (4) Power plants (5) Telephone lines Select the correct answer using the code given below:

1, 2, 3 and 5 only

1, 2 and 4 only

3, 4 and 5 only

1, 2, 3, 4 and 5

6

With reference to furnace oil, consider the following statements: (1) It is a product of oil refineries. (2) Some industries use it to generate power. (3) Its use causes sulphur emissions into environment. Which of the statements given above are correct

1 and 2 only

2 and 3 only

1 and 3 only

1, 2 and 3

7

Which of the following have species that can establish symbiotic relationship with other organisms? (1) Cnidarians (2) Fungi (3) Protozoa Select the correct answer using the code given below

1 and 2 only

2 and 3 only

1 and 3 only

1, 2 and 3

8

Which of the following are detritivores? (1) Earthworms (2) Jellyfish (3) Millipedes (4) Seahorses (5) Woodlice Select the correct answer using the code given below:

1, 2 and 4 only

2, 3, 4 and 5 only

1, 3 and 5 only

1, 2, 3, 4 and 5

9

Steel slag can be the material for which of the following?
1. Construction of base road
2. Improvement of agricultural soil
3. Production of cement
Select the correct answer using the code given below:

1 and 2 only

2 and 3 only

1 and 3 only

1, 2 and 3

10

In case of which one of the following biogeochemical cycles, the weathering of rocks is the main source of release of nutrient to enter the cycle?

Carbon cycle

Nitrogen cycle

Phosphorus cycle

Sulphur cycle