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Environment & EcologyMediumAsked in: SSC GD Constable · 10 Jan 2023, Shift 1

Identify a way to reduce the pollution caused due to burning of fossil fuels

  1. A.By lowering the temperature of burning
  2. B.By increasing the efficiency of the combustion process
  3. C.By increasing the number of carbon molecules
  4. D.By decreasing the latent heat

Correct answer

B. By increasing the efficiency of the combustion process

Explanation

The correct answer is B, By increasing the efficiency of the combustion process. When coal, petrol or diesel burn with too little oxygen, the burning is incomplete and gives out carbon monoxide, soot and unburnt hydrocarbons, the worst pollutants from vehicles and power plants. Efficient, complete combustion turns more of the fuel into carbon dioxide and water and also gets more energy from each litre or kilogram, so less fuel has to be burnt. Catalytic converters in vehicles, which change carbon monoxide and nitrogen oxides into less harmful gases, and cleaner fuels such as CNG work on the same idea. A is wrong because lowering the burning temperature leads to incomplete combustion and more smoke and carbon monoxide. C is wrong because adding more carbon only means more carbon dioxide and more soot. D is wrong because latent heat is the heat needed to change the state of a substance, such as ice to water, and has nothing to do with pollution from burning. Exam tip: complete combustion gives CO2 and water; incomplete combustion gives carbon monoxide and soot.

Practice Questions

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Q2.Environment & EcologyAsked in: CDS · CDS-I 2019, GKMedium

Which one of the following statements about the National Green Tribunal is not correct?

  1. A.It was set up in the year 2010.
  2. B.It is involved in effective and expeditious disposal of cases relating to environmental protection and conservation of forests.
  3. C.It may consider giving relief and compensation for damages to persons and property.
  4. D.It is bound by the procedures laid down under the Code of Civil Procedure, 1908.
Show answer
Correct answer: D. It is bound by the procedures laid down under the Code of Civil Procedure, 1908.

The National Green Tribunal is not bound by the Code of Civil Procedure; it is guided by the principles of natural justice.

Q3.Environment & EcologyAsked in: CDS · CDS-I 2018, GKHard

Consider the following statements about National Wildlife Action Plan (NWAP) of India for 2017-2031:

1. This is the Third National Wildlife Action Plan.

2. The NWAP is unique as this is the first time India has recognized the concerns relating to climate change impact on wildlife.

3. The NWAP has ten components.

Which of the statements given above is/are correct?

  1. A.1 only
  2. B.1 and 2 only
  3. C.2 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: B. 1 and 2 only

The plan for 2017-2031 is India's third National Wildlife Action Plan and the first to deal with the impact of climate change on wildlife, but it has five components, not ten.