Environmental pollution is one of the biggest problems every human being is facing today, and everybody should know about it to prevent the destruction caused by it, irrespective of whether one is preparing for exams or not. For the exams, it is one of the most important and one of the most asked as well as the most important topics, so we have curated the best MCQ set for it. All the below-mentioned MCQs are extracted from renowned books and journals, thus, anyone preparing for any of the competitive exams like UPSC, JKpsc, and SSC exams is suggested to go through these MCQs to secure their chance in the upcoming examinations. MCQs also check your level of preparation for any topic you are studying, so all candidates preparing must give it a shot without any delay. These MCQs are also important for the last-minute revisions of the topic so to prepare smartly all the candidates are suggested to go through it.
Which of the following best describes pollution?
A) It is the process of planting more and more trees
B) It is the addition of unwanted materials to the environment
C) It is the increase in the number of plants and animals
D) It is the complete harmony among the living beings
Correct Answer – Option B, It is the addition of unwanted materials to the environment
What is the best definition of pollutants in environmental pollution?
A) These are the essential compounds and substances that are added to the soil for fertility
B) Natural oxygen and water present in the air
C) Physical, chemical, or biological substances harmful to life
D) Pure gases released from trees and plants
Correct Answer – Option C, Physical, chemical, or biological substances harmful to life
Which one of the following is not considered a type of pollution in the environment?
A) Air pollution
B) Noise pollution
C) Soil pollution
D) Plant pollution
Correct Answer – Option D, Plant pollution
Toxic gases like carbon monoxide and nitrogen oxides are a major source of which type of pollution?
A) Noise pollution
B) Air pollution
C) Thermal pollution
D) Soil pollution
Correct Answer – Option B, Air pollution
Fly ash causes pollution of which of the following resources?
A) Only soil
B) Only air
C) Air and water both
D) Only forests
Correct Answer – Option C, Air and water both
Which metal harms the kidneys, liver, and reduces children’s intelligence?
A) Copper
B) Zinc
C) Lead
D) Iron
Correct Answer – Option C, Lead
Which of the following is a tried and tested method to reduce indoor air pollution?
A) Burning plastics and rubber
B) Using smokeless chullahs
C) Cooking with coal
D) Keeping all windows shut
Correct Answer – Option B, Using smokeless chullahs
Which device collects dust particles by charging them with ions?
A) Filters
B) Electrostatic precipitators
C) Scrubbers
D) Inertial collectors
Correct Answer – Option B, Electrostatic precipitators
Scrubbers are used for removing which type of pollutants from air and gases?
A) Only dust particles
B) Suspended metals only
C) Gaseous and aerosol pollutants
D) Greenhouse gases only
Correct Answer – Option C, Gaseous and aerosol pollutants
Which among the following gases is not considered a greenhouse gas?
A) Carbon dioxide
B) Methane
C) Oxygen
D) Nitrous oxide
Correct Answer – Option C, Oxygen
Which layer of the Earth is damaged by the use of CFCs present in refrigerators?
A) Oxygen layer
B) Ozone layer
C) Carbon dioxide layer
D) Dust layer
Correct Answer – Option B, Ozone layer
The unwanted sound that sometimes causes permanent hearing loss is known as?
A) Noise pollution
B) Sound pollution
C) Air pollution
D) Echo pollution
Correct Answer – Option A, Noise pollution
According to the World Health Organization, what should be the safe noise level during nighttime?
A) 35 dB
B) 45 dB
C) 55 dB
D) 65 dB
Correct Answer – Option A, 35 dB
Which of the following is considered an outdoor source of noise pollution?
A) Washing machines
B) Generators in homes
C) Loudspeakers and heavy vehicles
D) Fans and air coolers
Correct Answer – Option C, Loudspeakers and heavy vehicles
The presence of harmful chemicals, pesticides, or sewage in lakes and rivers is known as?
A) Soil pollution
B) Thermal pollution
C) Water pollution
D) Noise pollution
Correct Answer – Option C, Water pollution
Name the disease in humans caused by mercury pollution in water bodies?
A) Itai-Itai disease
B) Cancer
C) Minamata disease
D) Skin cancer
Correct Answer – Option C, Minamata disease
The rapid growth of algae and phytoplankton in nutrient-rich water bodies is called?
A) Thermal pollution
B) Soil erosion
C) Eutrophication
D) Sedimentation
Correct Answer – Option C, Eutrophication
What is the main harmful effect of eutrophication?
A) Increase in dissolved oxygen
B) Sudden decrease in dissolved oxygen
C) Increase in food chain balance
D) Improvement of swimming ability
Correct Answer – Option B, Sudden decrease in dissolved oxygen
Which treatment stage of sewage water mainly removes suspended solid particles?
A) Primary treatment
B) Secondary treatment
C) Tertiary treatment
D) Final recycling
Correct Answer – Option A, Primary treatment
Which of the following best describes soil pollution?
A) Addition of compost to soil
B) Addition of substances reducing soil quality and fertility
C) Mixing of organic matter with soil
D) Growing crops without fertilizers
Correct Answer – Option B, Addition of substances reducing soil quality and fertility
Which non-biodegradable item releases poisonous gases like dioxins into the air?
A) Wood pieces
B) Plastic bags
C) Paper cups
D) Cotton cloths
Correct Answer – Option B, Plastic bags
Which method converts domestic organic waste into manure through earthworms?
A) Incineration
B) Composting
C) Vermicomposting
D) Sedimentation
Correct Answer – Option C, Vermicomposting
Which radiation is produced in microwave ovens?
A) Gamma rays
B) Non-ionizing radiation
C) X-rays
D) Ionizing radiation
Correct Answer – Option B, Non-ionizing radiation
Which type of radiation exposure causes genetic changes?
A) Somatic radiation damage
B) Temporary skin damage
C) Non-ionizing radiation only
D) Genetic radiation damage
Correct Answer – Option D, Genetic radiation damage
Which nuclear disaster in 1986 released huge radiation?
A) Three Mile Island, USA
B) Fukushima, Japan
C) Chernobyl, USSR
D) Nagasaki, Japan
Correct Answer – Option C, Chernobyl, USSR
