NEET Chemistry · Chapter-wise PYQs

Environmental Chemistry NEET PYQs (2005–2026) with Solutions

Environmental Chemistry has appeared in 6 of the 22 NEET and AIPMT papers from 2005 to 2026, with 7 questions in all: about 0.3 per paper on average. The last five papers (2022–2026) had 2 questions from it.

The most-asked topics are Atmospheric Pollution (1), Atmospheric Pollution and Oxides of Sulphur (1) and Carbon Monoxide Sink (1).

Environmental Chemistry is not one of the chapters in NEET MIND's map of the current NEET syllabus, so it may no longer be examined; its past questions stay here for practice.

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Free account: 7 PYQs from Environmental Chemistry with explanations and progress tracking.

PYQs in this chapter
7
Papers it appeared in
6 of 22
Average per paper
0.3
NEET weightage
Not in syllabus map

7 solved Environmental Chemistry PYQs

Real NEET and AIPMT questions from this chapter, newest first. Try each one, then open the answer and the step-by-step explanation.

  1. Question 1 (NEET 2022)

    NEET 2022MediumAtmospheric Pollution and Oxides of Sulphur
    The pollution due to oxides of sulphur gets enhanced due to the presence of: (a) particulate matter (b) ozone (c) hydrocarbons (d) hydrogen peroxide Choose the most appropriate answer from the options given below:
    1. Option A: (a), (c), (d) only
    2. Option B: (a), (d) only
    3. Option C: (a), (b), (d) only
    4. Option D: (b), (c), (d) only
    Show answer & explanation

    Correct answer: (C) (a), (b), (d) only

    Explanation

    Oxides of sulphur pollution is enhanced in the presence of particulate matter, ozone and hydrogen peroxide due to accelerated oxidation processes leading to acid formation. Hydrocarbons are not directly responsible. Therefore, the correct combination is (a), (b), (d). Hence option (C) is correct.

  2. Question 2 (NEET 2022)

    NEET 2022EasyIndustrial Pollution Control
    The device which can remove particulate matter present in the exhaust from a thermal power plant is:
    1. Option A: Catalytic Converter
    2. Option B: STP
    3. Option C: Incinerator
    4. Option D: Electrostatic Precipitator
    Show answer & explanation

    Correct answer: (D) Electrostatic Precipitator

    Explanation

    Electrostatic precipitators remove fine particulate matter from industrial and thermal power plant exhaust gases using electrically charged plates.

  3. Question 3 (NEET 2021)

    NEET 2021MediumAtmospheric Pollution
    Match List-I with List-II.
    1. Option A: (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
    2. Option B: (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
    3. Option C: (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
    4. Option D: (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
    Show answer & explanation

    Correct answer: (D) (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

    Explanation

    SO2 oxidation contributes to tropospheric pollution, HOCl photolysis causes ozone depletion, acid rain reacts with CaCO3, and NO2 photolysis contributes to photochemical smog.

  4. Question 4 (NEET 2018)

    NEET 2018EasyOxides of nitrogen as pollutants
    Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?
    1. Option A: N₂O₅
    2. Option B: NO₂
    3. Option C: NO
    4. Option D: N₂O
    Show answer & explanation

    Correct answer: (A) N₂O₅

    Explanation

    Common atmospheric nitrogen oxide pollutants include NO, NO₂ and N₂O produced from combustion processes and natural activities. N₂O₅ is comparatively unstable and is not considered a common atmospheric pollutant. Hence, option (A) is correct.

  5. Question 5 (NEET 2017)

    NEET 2017EasyCarbon Monoxide Sink
    Which of the following is a sink for CO?
    1. Option A: Plants
    2. Option B: Haemoglobin
    3. Option C: Micro-organisms present in the soil
    4. Option D: Oceans
    Show answer & explanation

    Correct answer: (C) Micro-organisms present in the soil

    Explanation

    Micro-organisms present in soil oxidize carbon monoxide and act as an important natural sink for CO.

  6. Question 6 (AIPMT 2014)

    AIPMT 2014EasyPhotochemical Smog
    Which of the following is not a common component of photochemical smog?
    1. Option A: Ozone
    2. Option B: Acrolein
    3. Option C: Peroxyacetyl nitrate
    4. Option D: Chlorofluorocarbons
    Show answer & explanation

    Correct answer: (D) Chlorofluorocarbons

    Explanation

    Photochemical smog commonly contains ozone (O₃), aldehydes such as acrolein, and peroxyacetyl nitrate (PAN). Chlorofluorocarbons (CFCs) are not common constituents of photochemical smog.

  7. Question 7 (AIPMT 2008)

    AIPMT 2008EasyGreen Chemistry
    Green chemistry means such reactions which
    1. Option A: Study the reactions in plants
    2. Option B: Produce colour during reactions
    3. Option C: Reduce the use and production of hazardous chemicals
    4. Option D: Are related to the depletion of ozone layer
    Show answer & explanation

    Correct answer: (C) Reduce the use and production of hazardous chemicals

    Explanation

    Green chemistry is the design of chemical products and processes that reduce or eliminate the use and generation of hazardous substances. Therefore option (C) is correct.

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