Environment and Ecology questions with answers

2,222 multiple-choice questions. Open any question for its answer and explanation.

Questions asked in State PSC and UPSC prelims, by topic. Each topic also has notes to read.

Read the notes: Pollution →

26. Which one of the following fuels causes minimum environmental pollution ?Asked in HPPSC HPAS Prelims 2013
27. The government has released a new four- color classification scheme for industries based on their pollution potential. Which is not correct in this regard?Asked in HPPSC HPAS Prelims 2020
28. Most of the air pollution that we experience is located in :Asked in HPPSC HPAS Prelims 2021
29. Match List I with List II: List I (Air Pollution Incident) (a) Meuse (1930) (b) Donora (1948) (c) Bhopal (1984) (d) London (1952) List II (Country) (i) England (ii) India (iii) USA (iv) Belgium Choose the correct answer from the options given below:Asked in HPPSC HPAS Prelims 2021
30. This matches (iii) USA. (c) Bhopal (1984): The Bhopal gas tragedy occurred in Bhopal, India in 1984. This matches (ii) India. (d) London (1952): The Great Smog of London occurred in London, England (UK) in 1952. This matches (i) England. 30. The main precursors of winter smog are :Asked in HPPSC HPAS Prelims 2021
31. According to the latest Air Quality Report (2024) which Indian City emerged as the most polluted ?Asked in HPPSC HPAS Prelims 2024
32. Under Government of India’s National Air Quality Monitoring Programme (NAMP) covering 312 cities / towns in 29 States and 6 Union Territories of the country, which of the following combination has been identified for regular monitoring at all the locations?Asked in JPSC CS Prelims 2021
33. Consider the following statements regarding SAFAR system inaugurated recently :Asked in KPSC KAS Prelims 2017
34. Which of the following statements are correct with reference to 'AdBlue'? (a) It is a diesel exhaust fluid used to reduce the amount of air pollution emitted by BS 6 diesel engine. (b) It is a mixture of demineralised water and pure urea. (c) It is blue colour toxic fluid with highly flammable properties. (d) It reduces the level of sulphur dioxide from the vehicle emission. Choose the correct answer from the options given below :Asked in KPSC KAS Prelims 2024
35. The main air pollutant(s) in metropolitan cities is/areAsked in MPPSC CS Prelims 2018
36. Coal can be made more efficient and cleaner fuel by converting it into ___________ .Asked in MPSC CS Prelims 2013
37. Match the following Pollutants and their Mediums as per the UNEP documents : Pollutant Medium a. Nitrogen oxides I. Sea b. Petroleum hydrocarbons II. Food c. Fluorides III. Air d. Mycotoxins IV. Fresh waterAsked in MPSC CS Prelims 2018
38. Find out correct statements regarding Air Quality Index (AQI) in India. (a) It reports quality of air on a daily basis. (b) Higher the AQI value, greater the level of air pollution. (c) India follows 500 points scale. (d) Monitors record concentration of the major pollutants to calculate AQI. Answer Options :Asked in MPSC CS Prelims 2020
39. Which acid is present in Acid Rain ?Asked in CGPSC Prelims Exam 2017
40. Nitrogen fertilizers in soils releases _____ when broken down by bacteria.Asked in MPSC CS Prelims 2023
41. One of the main causes of air pollution in cities is emissions from vehicles like cars and trucks. Cars emit various pollutants which are bad for human health when inhaled, like 1. Nitrogen oxides (NOx) 2. Carbon monoxide (CO) 3. Carbon dioxide (CO2) 4. Benzene Which of the above pollutants are not tolerated by human beings even at very low levels ?Asked in UPSC NDA 1 2016
42. Which one of the following sectors is the largest contributor to carbon dioxide emissions from fuel consumption in India ?Asked in UPSC NDA 2 2016
43. Which one of the following is a cause of acid rains?Asked in UPSC NDA 2 2017 · UPSC CAPF 2023
44. Which one of the following is a major environmental issue in eastern Canada?Asked in UPSC NDA 2 2020
45. The main pollutants responsible for causing green house effect, acid rain and ozone layer depletion are :Asked in OPSC CS Prelims 2016
46. Which of the following can be used for controlling Gaseous Air Pollutant ?Asked in OPSC CS Prelims 2016
47. Acid rain is caused by increase in the atmospheric concentration of :Asked in OPSC CS Prelims 2016 · OPSC CS Prelims 2019
48. The pollutant generated in high quantity by the thermal power plants is:Asked in OPSC CS Prelims 2017
49. Which Committee has been constituted by the Union Government to continuously monitor the solutions to air pollution?Asked in OPSC CS Prelims 2017
50. Which one of the following is a useful biological indicator of sulphur dioxide pollution ?Asked in OPSC CS Prelims 2018