Environment previous year Questions UPSC /IAS 2021

1. Why is there a concern about copper smelting plants? (UPSC / IAS 2021)

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.

2. With reference to furnace oil, consider the following statements: (UPSC / IAS 2021)

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?

3. In the nature, which of the following is/are most likely to be found surviving on a

surface without soil? (UPSC / IAS 2021)

1. Fern
2. Lichen
3. Moss
4. Mushroom

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4. Which one of the following is used in preparing a natural mosquito repellent? (UPSC / IAS 2021)

5. Consider the following kinds of organisms: (UPSC / IAS 2021)

1. Copepods
2. Cyanobacteria
3. Diatoms
4. Foraminifera

Which of the above are primary producers in the food chains of oceans?

6. Consider the following animals: (UPSC / IAS 2021)

1. Hedgehog
2. marmot
3. Pangolin

to reduce the chance of being captured by predators, which of the above

organisms rolls up/roll up and protects/protect its/their vulnerable parts?

7. With reference to the ‘New York Declaration on Forests’, which of the following

statements are correct? (UPSC / IAS 2021)

1. It was first endorsed at the United Nations Climate Summit in 2014.
2. It endorses a global timeline to end the loss of forests.
3. It is a legally binding international declaration.
4. It is endorsed by governments, big companies and indigenous communities.
5. India was one of the signatories at its inception.

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8. Magnetite particles, suspected to cause neurodegenerative problems, are generated as

environmental pollutants from which of the following? (UPSC / IAS 2021)

1. Brakes of motor vehicles
2. Engines of motor vehicles
3. Microwave stoves within home
4. Power plants
5. Telephone lines

Select the correct answer using the code given below.

9. Which one of the following is a filter feeder?

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? (UPSC / IAS 2021)

11. Which of the following are detritivores? (UPSC / IAS 2021)

1. Earthworms
2. Jellyfish
3. Millipedes
4. Seahorses
5. Woodlice

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12. The ‘Common Carbon Metric’, supported by UNEP, has been developed for(UPSC / IAS 2021)

13. The ‘Common Carbon Metric’, supported by UNEP, has been developed for(UPSC / IAS 2021)