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Environmental Chemistry — NEET UG Chemistry PYQs

349 previous year questions from Environmental Chemistry with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

349 questionsChemistrySolutions on every page
1

An organic halogen compound which is used as refrigerant in refrigerators and air conditioners is

MHT CET Medical 2026 Solution View → 2

According to green chemistry, which of the following features is NOT favored by the catalyst?

MHT CET Medical 2026 Solution View → 3

Which of the following is responsible for depletion of ozone layer in stratosphere?

MHT CET Medical 2026 Solution View → 4

Which of the following is NOT a principle of green chemistry?

MHT CET Medical 2026 Solution View → 5

Which of the following is one of the 12 principles of Green Chemistry?

MHT CET Medical 2026 Solution View → 6

What is use of Carbon tetrachloride?

MHT CET Medical 2026 Solution View → 7

Which statement is not true about photochemical smog?

NEET 2023 Solution View → 8

Given below are two statements : Statement I : The nutrient deficient water bodies lead to eutrophication. Statement II : Eutrophication leads to decrease in the level of oxygen in

NEET 2023 Solution View → 9

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 ans

NEET 2022 Solution View → 10

Match List-I with List-II: Choose the correct answer from the options given below:

NEET 2022 Solution View → 11

Match List - I with List - II. List-I List-II (a) 2 SO 2 g + O 2 g → 2 SO 3 g (i) Acid rain (b) HOCl g ⟶ hv OH ∙ + Cl ∙ (ii) Smog (c) CaCO 3 + H 2 SO 4 &#8

NEET 2021 Solution View → 12

Which of the following is not correct about carbon monoxide?

NEET 2020 Solution View → 13

Which of the following statement is NOT true about acid rain?

NEET 2020 Solution View → 14

Among the following, the one that is not a greenhouse gas is:

NEET 2019 Solution View → 15

The liquified gas that is used in dry cleaning along with a suitable detergent is

NEET 2019 Solution View → 16

Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?

NEET 2018 Solution View → 17

Which of the following region is coldest?

JIPMER 2017 Solution View → 18

Which of the following is a sink for CO ?

NEET 2017 Solution View → 19

Which of the following statement(s) is not correct?

JIPMER 2016 Solution View → 20

500 mL of a sample of water required 19.6 mg of K ₂ Cr ₂ O ₇ for the oxidation of dissolved organic matter in it in the presence of H ₂ SO ₄ . The COD of water sample is

JIPMER 2015 Solution View → 21

Eutrophication of a lake means, it

JIPMER 2015 Solution View → 22

Which of the following soap/detergent is least, reduce space biodegradable?

JIPMER 2015 Solution View → 23

In Fischer-Ringe's method of separation of nobles gas mixture from air, is used

JIPMER 2014 Solution View → 24

Green chemistry means such reactions which

JIPMER 2014 Solution View → 25

Which one of the following is not a common component of Photochemical Smog?

NEET 2014 Solution View → 26

Excess fluoride (over 10 ppm ) in drinking water can cause

JIPMER 2013 Solution View → 27

Which one of following statements is not true?

NEET 2013 Solution View → 28

Which one of the following is mainly responsible for depletion of ozone layer?

JIPMER 2012 Solution View → 29

Which one of the following statements regarding photochemical smog is not correct?

NEET 2012 Solution View → 30

Which one of the following statements is not true?

NEET 2011 Solution View → 31

Freon used as refrigerant is

JIPMER 2008 Solution View → 32

Green chemistry means such reactions which

NEET 2008 Solution View → 33

On the basis of the following (E^ ) values, the strongest oxidizing agent is :- ( aligned & [ Fe ( CN )₆ ]⁴⁻ [ Fe ( CN )₆ ]³⁻+e⁻¹, E ^ =-0.35 ~V & Fe ²⁺ Fe ³⁺+e⁻¹ ; E ^ =-0.77 ~V a

NEET 2008 Solution View → 34

Green chemistry means such reactions which

NEET 2008 Solution View → 35

Which of the following is secondary pollutant?

JIPMER 2006 Solution View → 36

Which one of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

NEET 2004 Solution View → 37

What is the primary consequence of adding excessive organic matter to water?

NEET Solution View → 38

What is the primary goal of Swachh Bharat Mission Gramin (SBM–G)?

NEET Solution View → 39

What is the common method of disposing of small quantities of toxic waste?

NEET Solution View → 40

What is the potential consequence of ineffective solid waste management on the environment?

NEET Solution View → 41

Which of the following gases is not a significant contributor to the greenhouse effect and global warming?

NEET Solution View → 42

How does nitrate contamination in drinking water primarily affect infants?

NEET Solution View → 43

Which of the following is a symptom of excessive sulphate consumption through drinking water?

NEET Solution View → 44

What is a significant concern related to food storage in India?

NEET Solution View → 45

Which season in Antarctica experiences the formation of polar stratospheric clouds?

NEET Solution View → 46

Which greenhouse gas is associated with damage to the ozone layer?

NEET Solution View → 47

What is the consequence of high BOD in water?

NEET Solution View → 48

What is the consequence of poor waste management?

NEET Solution View → 49

What is a potential consequence of using herbicides in cornfields?

NEET Solution View → 50

Which component of smog results from the action of sunlight on unsaturated hydrocarbons and nitrogen oxides?

NEET Solution View → 51

What are the environmental benefits of using water as a medium for chemical reactions in green chemistry?

NEET Solution View → 52

Which gas is responsible for the redness and irritation of eyes in the presence of air pollution?

NEET Solution View → 53

What is the primary gas responsible for global warming?

NEET Solution View → 54

What is the primary role of aerobic bacteria in water?

NEET Solution View → 55

What is the term used to describe the natural process that keeps the Earth's temperature stable?

NEET Solution View → 56

How are large quantities of toxic wastes typically disposed of?

NEET Solution View → 57

What is the role of chlorine radicals in ozone depletion in the stratosphere?

NEET Solution View → 58

In what industry are large quantities of toxic wastes commonly generated?

NEET Solution View → 59

In addition to using water filters, what is another preventive measure to reduce lead exposure in older homes with lead pipes?

NEET Solution View → 60

What is the approximate height of the troposphere from sea level?

NEET Solution View → 61

What is the classification of alkali metals based on their density?

NEET Solution View → 62

What is the threshold for sulphate levels in drinking water to cause a laxative effect?

NEET Solution View → 63

What is the potential effect of excessive sulphate (>500 ppm) in drinking water?

NEET Solution View → 64

Which group of people is most susceptible to the adverse effects of nitrate in drinking water?

NEET Solution View → 65

Which of the following is NOT an example of a particulate pollutant produced by condensation of vapors or spray liquids in the air?

NEET Solution View → 66

How does green chemistry aim to minimize chemical pollutants in the environment during a synthesis?

NEET Solution View → 67

Which type of smog is characterized by a mixture of smoke, fog, and sulfur dioxide?

NEET Solution View → 68

What is the term for the pollutants that can be traced back to specific, identifiable sources of contamination?

NEET Solution View → 69

Which date marks the birth anniversary of Mahatma Gandhi?

NEET Solution View → 70

What is the role of water vapor in the greenhouse effect?

NEET Solution View → 71

Which two programmes fall under the Swachh Bharat Abhiyan?

NEET Solution View → 72

What is the typical concentration of oxygen in the atmosphere?

NEET Solution View → 73

What is the potential harm associated with the accumulation of phosphates in water?

NEET Solution View → 74

What happens when the pH of rainwater drops below 5.6?

NEET Solution View → 75

How does soluble fluoride affect drinking water?

NEET Solution View → 76

What is the lowest region of the atmosphere where human beings and other organisms live called?

NEET Solution View → 77

What action can individuals take to reduce lead exposure from drinking water?

NEET Solution View → 78

Which class of pollutants includes heavy metals like cadmium and mercury?

NEET Solution View → 79

Which gas is primarily responsible for protecting against harmful UV radiation in the stratosphere?

NEET Solution View → 80

What was the primary source of airborne lead emissions in Indian cities, and how has it been addressed?

NEET Solution View → 81

How can photochemical smog be controlled?

NEET Solution View → 82

Which atmospheric layer contains dinitrogen, dioxygen, ozone, and little water vapor?

NEET Solution View → 83

What role does oxygen play in the formation of ozone in the atmosphere?

NEET Solution View → 84

What is an example of a non-viable particulate pollutant that consists of solid or liquid particles formed during the combustion of organic matter?

NEET Solution View → 85

What is the potential consequence of the melting of polar ice caps due to global warming?

NEET Solution View → 86

What is the first step in the waste disposal process?

NEET Solution View → 87

Which of the following is an example of nonpoint source pollution?

NEET Solution View → 88

What happens to nitrogen dioxide and methane in the summer season over Antarctica?

NEET Solution View → 89

What is the potential effect of sulphate levels in drinking water exceeding 750 ppm?

NEET Solution View → 90

What is the primary factor responsible for global warming?

NEET Solution View → 91

What is the process of lead leaching into drinking water called?

NEET Solution View → 92

What is the primary cause of acid rain?

NEET Solution View → 93

What is the primary purpose of recycling non-biodegradable materials like plastic, glass, and metal scraps?

NEET Solution View → 94

What is the effect of carbon monoxide (CO) on the human body?

NEET Solution View → 95

What is the main reason nitrate can enter drinking water from agricultural activities?

NEET Solution View → 96

What is the primary role of bacteria in water with organic matter?

NEET Solution View → 97

In which atmospheric layer does most of Earth's weather phenomena occur?

NEET Solution View → 98

What is the main cause of ozone depletion over Antarctica during the winter season?

NEET Solution View → 99

What is the result of the hydrolysis of chlorine nitrate over Antarctica?

NEET Solution View → 100

Which type of particulate pollutants is produced by the condensation of vapors during sublimation, distillation, boiling, and chemical reactions?

NEET Solution View → 101

Which organ may be affected by prolonged exposure to high levels of sulphate in drinking water?

NEET Solution View → 102

What is the primary goal of Swachh Bharat Mission–Urban (SBM–U)?

NEET Solution View → 103

What is the primary environmental concern associated with the improper disposal of non-degradable industrial solid wastes?

NEET Solution View → 104

What happens to waste that is not collected in garbage bins?

NEET Solution View → 105

Which of the following is a degradable waste?

NEET Solution View → 106

What is the classification of alkali metals based on their density?

NEET Solution View → 107

How can crops and food items be protected from damage by insects, rodents, weeds, and crop diseases?

NEET Solution View → 108

Which gases are included in the group of greenhouse gases?

NEET Solution View → 109

What is the potential consequence of prolonged exposure to high levels of sulphate in drinking water?

NEET Solution View → 110

What is the term used to describe the amount of oxygen required by bacteria to break down organic matter in water?

NEET Solution View → 111

What happens to non-biodegradable materials like plastic, glass, and metal scraps in the waste disposal process?

NEET Solution View → 112

In clean water, what is the typical BOD value?

NEET Solution View → 113

Which of the following organic solvents is highly toxic and should be used with caution?

NEET Solution View → 114

Which of the following sectors receives high priority for development in India's economy?

NEET Solution View → 115

What are the main sources of pathogens in water?

NEET Solution View → 116

What is the primary cause of photochemical smog?

NEET Solution View → 117

What is the consequence of an increase in global temperature?

NEET Solution View → 118

What is the source of oxygen in water during the day?

NEET Solution View → 119

What can happen if animals swallow polythene bags?

NEET Solution View → 120

In terms of BOD, what is the characteristic of highly polluted water?

NEET Solution View →
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