Env, Environment, UPSC PYQ

1

Consider the following statements

1. Carbon fibres are used in the manufacture of components used in automobiles and aircrafts.
2. Carbon fibres once used cannot be recycled.

Which of the statements given above is fare correct?

1 only

2 only

Both 1 and 2

Neither 1 nor 2

2

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

3

Which one of the following is a filter feeder?

Catfish

Octopus

Oyster

Pelican

4

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

5

Consider the following statements regarding mercury pollution :

1. Gold mining activity is a source of mercury pollution in the world.
2. Coal-based thermal power plants cause mercury pollution.
3. There is no known safe level of exposure to mercury.

How many of the above statements are correct?

Only one

Only two

All three

None

6

Which one of the following best describes the term “greenwashing”?

Conveying a false impression that a company’s products are eco-friendly and environmentally sound

Non-inclusion of ecological/environmental costs in the Annual Financial Statements of a country

Ignoring the disastrous ecological consequences while undertaking infrastructure development

Making mandatory provisions for environmental costs in a government project/programme

7

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

8

With reference to the role of biofilters in Recirculating Aquaculture System, consider the following statements :

1. Biofilters provide waste treatment by removing uneaten fish feed.
2. Biofilters convert ammonia present in fish waste to nitrate.
3 . Biofilters increase phosphorus as nutrient for fish in water.

How many of the statements given above are correct?

Only one

Only two

All three

None

9

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

10

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