Jump to a section

Chemistry - Environmental Chemistry

Practise 46 TS EAMCET previous year questions on Environmental Chemistry, compiled from papers spanning 2001 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty TS EAMCET tests.

Environmental Chemistry has been asked in 21 of the 24 years of TS EAMCET papers analysed (2001–2024), with 46 questions in all. 87% of them were easy, 11% moderate and 2% tough. Most of its questions came from 2020, with 7 questions that year. In the last three years (2022–2024) it had 4 questions across 17 papers, about 0.2 per paper.

The chapter's 4 topics are not weighted equally: Air Pollution (31 questions, 67%), Water Pollution (10 questions, 22%), and Environmental Pollution and pollutants (4 questions, 9%) have been asked the most. Air Pollution has also led over the last five years, with 7 questions. Water Pollution has produced the most tough questions (1).

  1. 1Which of the following is not the common component of photochemical smog?04 May, 2025 (M)Air Pollution
  2. 2Observe the following statements Statement-I: The carbon containing components of photochemical smog are acrolein, methanal and PAN Statemen04 May, 2025 (E)Air Pollution
  3. 3In drinking water, if the maximum prescribed concentration of copper is , the maximum prescribed concentration of zinc will be03 May, 2025 (M)Water Pollution
  4. 4Which of the following is a lung irritant that can lead to an acute respiratory disease in children?03 May, 2025 (E)Air Pollution
  5. 5Among the following compounds, which one is not primarily responsible for depletion of ozone layer in stratosphere?02 May, 2025 (M)Air Pollution
  6. 6Identify the correct statements from the following I. Photochemical smog has high concentration of oxidising agents II. is present in classi02 May, 2025 (E)Air Pollution
  7. 7Eutrophication can lead to11 May, 2024 (M)Water Pollution
  8. 8Which of the following industries generate nonbiodegradable wastes?10 May, 2024 (E)Environmental Pollution and pollutants
  9. 9The common components of photochemical smog are09 May, 2024 (M)Air Pollution
  10. 10Methemoglobinemia is due to09 May, 2024 (E)Environmental Pollution and pollutants
  11. 11The reagent used in the determination of the chemical oxygen demand (COD) of water sample is06 Aug, 2021 (E)Water Pollution
  12. 12The indicator used during the estimation of COD of a water sample is05 Aug, 2021 (E)Water Pollution
  13. 13Ozone is formed in the upper atmosphere by a photochemical reaction with O 2 in the presence of04 Aug, 2021 (E)Air Pollution
  14. 14Acid rain is mainly caused by the emissions of which of the following gases? I. Sulphur dioxide II. Carbon dioxide III. Nitrogen dioxide IV.14 Sep, 2020 (E)Air Pollution
  15. 15Which of the following molecules is present in photochemical smog?11 Sep, 2020 (M)Air Pollution
  16. 16The average atmospheric residence time is lowest for which of the given the greenhouse gas?11 Sep, 2020 (E)Air Pollution
  17. 17Biochemical oxygen demand (BOD) is a measure of organic materials present in water, BOD value less than indicates a water sample to be10 Sep, 2020 (M)Water Pollution
  18. 18Which of the following is air pollutant?10 Sep, 2020 (E)Air Pollution
  19. 19The consequence of global warming may be the following09 Sep, 2020 (M)Air Pollution
  20. 20Which among the following is not the components of photochemical smog?09 Sep, 2020 (E)Air Pollution
  21. 21Match the following: The correct answer is06 May, 2019 (M)Control of environmental pollution
  22. 22The irritant red haze in traffic and congested places is due to04 May, 2019 (M)Air Pollution
  23. 23Consider the following reactions involving some atmospheric pollutants. Based on the above, the formation of formaldehyde from methane in th04 May, 2019 (E)Air Pollution
  24. 24What is the formula of the product formed when reacts with enamel on teeth?03 May, 2019 (M)Water Pollution
  25. 25Find the suitable IUPAC name of the compound given below.03 May, 2019 (E)Air Pollution
  26. 26Which of the following statements about smog is/are correct? (i) Smog formed on sumny days contain oxidísing molecules. (ii) Photochemical s07 May, 2018 (M)Air Pollution
  27. 27Identify the reactions that occur in photochemical smog. (i) (ii) ; (iii) (iv)05 May, 2018 (M)Air Pollution
  28. 28Pure water would have a BOD value of05 May, 2018 (E)Water Pollution
  29. 29When vegetation is burnt in the absence of oxygen, which of the following will be formed ?04 May, 2018 (M)Air Pollution
  30. 30Which of the following chemicals is not involved in photochemical smog formation?04 May, 2018 (E)Air Pollution
  31. 31In environmental chemistry, the medium which is affected by a pollutant is called as the2016Environmental Pollution and pollutants
  32. 32In municipal sewage, BOD values (in ppm) are2015Water Pollution
  33. 33What are and in the following reaction?2014Air Pollution
  34. 34Cataract and skin cancer are caused by2013Air Pollution
  35. 35The pair of gases responsible for acid rain are2012Air Pollution
  36. 36Which air pollutant is responsible for Bhopal gas tragedy?2011Air Pollution
  37. 37The acceptable level of carbon monoxide gas (CO) in the atmosphere in ppm level is2010Air Pollution
  38. 38The chemical entities present in thermosphere of the atmosphere are2009Environmental Pollution and pollutants
  39. 39Among the following compounds, which one is not responsible for depletion of ozone layer?2008Air Pollution
  40. 40Bhopal gas tragedy of 1984 was caused by2007Air Pollution
  41. 41is responsible for the decomposition of ozone to oxygen. Which of the following reacts with ozone to form oxygen?2006Air Pollution
  42. 42Which of the following is not an air pollutant?2005Air Pollution
  43. 43Identify the correct decreasing order of the following with respect to altitude from atmosphere I. Troposphere II. Mesosphere III. Thermosph2004Air Pollution
  44. 44Water is considered to be polluted if the dissolved oxygen D.O. content is less than ... :... ppm :2003Water Pollution
  45. 45Fluorosis disease is caused due to the reaction of ...... with excess of fluoride in the body.2002Water Pollution
  46. 46Which one of the following is mainly responsible for depletion of ozone layer?2001Air Pollution

Frequently Asked Questions

1.How many questions are available for Environmental Chemistry?

This chapter includes 46 questions compiled from TS EAMCET papers spanning 2001 to 2025.

2.Are these questions only from TS EAMCET, or from other exams too?

These are TS EAMCET questions specifically for the Environmental Chemistry chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Environmental Chemistry an important chapter for TS EAMCET Chemistry?

Environmental Chemistry has appeared in 22 of the 25 years of TS EAMCET papers covered here, with 46 questions across 46 papers - about one per paper it appears in.

4.What is the difficulty level of Environmental Chemistry questions in TS EAMCET?

Of the 46 questions analysed for this chapter, 87% are easy, 11% moderate and 2% tough. 2020 had the most, with 7 questions.

5.Which topics in Environmental Chemistry should I focus on?

These topics have carried the most weightage in Environmental Chemistry:

  • Air Pollution - 31 questions (67%)
  • Water Pollution - 10 questions (22%)
  • Environmental Pollution and pollutants - 4 questions (9%)
  • Water Pollution has produced the most tough questions (1).
6.Is Environmental Chemistry's weightage in TS EAMCET going up or down?

Across all 46 papers analysed, Environmental Chemistry has averaged about 1.0 questions per paper. In the last three years (2022–2024), that average has fallen, at about 0.2 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.