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12th Class Chemistry Chapter 16 MCQs with Answers

12th Class Chemistry Chapter 16 MCQs

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Welcome to the 12th Class Chemistry Chapter 16 MCQs Practice and Quiz Tests. We are presenting you with top MCQ questions from the 12th Class Chemistry Chapter 16 Environmental Chemistry.

You can find all the 12th Class Chemistry Chapter 16 MCQs online tests on our website. These online tests are great for learning and as well as for scoring maximum marks in your Intermediate Exams. We are making these Class 12 Chemistry MCQs online tests for those who want full marks in their exams.

Acid rain is caused by the presence of which pollutants in the atmosphere?
a) Carbon dioxide (CO2)
b) Sulfur dioxide (SO2) and nitrogen oxides (NOx)
c) Methane (CH4) and ozone (O3)
d) Particulate matter (PM10)

Answer
b) Sulfur dioxide (SO2) and nitrogen oxides (NOx)

Which gas is the major component responsible for the greenhouse effect?
a) Oxygen (O2)
b) Carbon dioxide (CO2)
c) Nitrogen (N2)
d) Hydrogen (H2)

Answer
b) Carbon dioxide (CO2)

The ozone layer is located in which region of the atmosphere?
a) Troposphere
b) Mesosphere
c) Stratosphere
d) Thermosphere

Answer
c) Stratosphere

Ozone depletion is mainly caused by:
a) Sulfur dioxide (SO2) emissions
b) Nitrogen oxides (NOx) emissions
c) Chlorofluorocarbons (CFCs) and other halocarbons
d) Carbon dioxide (CO2) emissions

Answer
c) Chlorofluorocarbons (CFCs) and other halocarbons

Which international agreement aimed to phase out the production and consumption of ozone-depleting substances?
a) Montreal Protocol
b) Kyoto Protocol
c) Paris Agreement
d) Basel Convention

Answer
a) Montreal Protocol

Which of the following is a primary air pollutant?
a) Ground-level ozone (O3)
b) Particulate matter (PM10)
c) Sulfuric acid (H2SO4)
d) Nitric oxide (NO)

Answer
d) Nitric oxide (NO)

1
The “Great Smog” of 1952 in London was primarily caused by:
a) Carbon dioxide (CO2) emissions
b) Methane (CH4) emissions
c) Sulfur dioxide (SO2) emissions
d) Nitrogen oxides (NOx) emissions

Answer
c) Sulfur dioxide (SO2) emissions

Which of the following air pollutants is a product of incomplete combustion of fossil fuels?
a) Sulfur dioxide (SO2)
b) Carbon monoxide (CO)
c) Nitrogen oxides (NOx)
d) Methane (CH4)

Answer
b) Carbon monoxide (CO)

The process of converting nitrogen oxides (NOx) and volatile organic compounds (VOCs)
in the presence of sunlight into ground-level ozone (O3) is known as:
a) Acidification
b) Photochemical smog formation
c) Eutrophication
d) Greenhouse effect

Answer
b) Photochemical smog formation

What is the primary source of anthropogenic carbon dioxide (CO2) emissions?
a) Transportation
b) Agriculture
c) Deforestation
d) Industrial processes

Answer
d) Industrial processes

The “Dead Zone” in the Gulf of Mexico is caused by:
a) Oil spills
b) Eutrophication
c) Radioactive waste dumping
d) Plastic pollution

Answer
b) Eutrophication

Which of the following is NOT a greenhouse gas?
a) Carbon dioxide (CO2)
b) Methane (CH4)
c) Nitrous oxide (N2O)
d) Sulfur dioxide (SO2)

Answer
d) Sulfur dioxide (SO2)

The term “eutrophication” refers to:
a) The accumulation of toxic substances in the food chain
b) The depletion of the ozone layer
c) The excessive growth of algae in water bodies
d) The formation of acid rain

Answer
c) The excessive growth of algae in water bodies

Which of the following pollutants is a major cause of indoor air pollution?
a) Carbon monoxide (CO)
b) Ground-level ozone (O3)
c) Sulfur dioxide (SO2)
d) Nitrogen oxides (NOx)

Answer
a) Carbon monoxide (CO)

The process of converting nitrogen oxides (NOx) and sulfur dioxide (SO2) into nitric acid
(HNO3) and sulfuric acid (H2SO4), respectively, is known as:
a) Photochemical smog formation
b) Acid rain formation
c) Greenhouse effect
d) Ozone depletion

Answer
b) Acid rain formation

The “ozone hole” is most pronounced over which region?
a) Antarctica
b) Arctic
c) North America
d) Europe

Answer
a) Antarctica

Volatile organic compounds (VOCs) are precursors to the formation of:
a) Ground-level ozone (O3)
b) Acid rain
c) Particulate matter (PM10)
d) Nitric oxide (NO)

Answer
a) Ground-level ozone (O3)

The process of converting nitric oxide (NO) into nitrogen dioxide (NO2) in the atmosphere is known as:
a) Volcanic activity
b) Nitrogen fixation
c) Nitrogen deposition
d) Photochemical oxidation

Answer
d) Photochemical oxidation

The combustion of fossil fuels releases which greenhouse gas into the atmosphere?
a) Methane (CH4)
b) Carbon dioxide (CO2)
c) Nitrous oxide (N2O)
d) Water vapor (H2O)

Answer
b) Carbon dioxide (CO2)

The “Minamata disease” was caused by the release of which toxic metal into the water
bodies?
a) Lead
b) Mercury
c) Cadmium
d) Chromium

Answer
b) Mercury

The process of converting nitrogen oxides (NOx) into nitric acid (HNO3) is a major contributor to:
a) Greenhouse effect
b) Ozone depletion
c) Acid rain
d) Photochemical smog formation

Answer
c) Acid rain

The “Cuyahoga River fire” in 1969 was a significant event that raised awareness about:
a) Oil spills
b) Acid rain
c) Water pollution
d) Air pollution

Answer
c) Water pollution

Which of the following is a secondary air pollutant formed through the reaction of nitrogen oxides (NOx) and volatile organic compounds (VOCs) in the presence of sunlight?
a) Particulate matter (PM10)
b) Carbon monoxide (CO)
c) Ground-level ozone (O3)
d) Sulfur dioxide (SO2)

Answer
c) Ground-level ozone (O3)

The process of converting sulfur dioxide (SO2) into sulfuric acid (H2SO4) in the atmosphere is a major contributor to:
a) Acid rain
b) Photochemical smog formation
c) Greenhouse effect
d) Ozone depletion

Answer
a) Acid rain

The “Great Pacific Garbage Patch” is an example of:
a) Air pollution
b) Soil pollution
c) Water pollution
d) Noise pollution

Answer
c) Water pollution

The process of converting carbon dioxide (CO2) into carbonic acid (H2CO3) in the atmosphere is a major contributor to:
a) Acid rain
b) Greenhouse effect
c) Ozone depletion
d) Photochemical smog formation

Answer
b) Greenhouse effect

The accumulation of persistent organic pollutants (POPs) in the food chain is known as:
a) Acidification
b) Eutrophication
c) Biomagnification
d) Greenhouse effect

Answer
c) Biomagnification

The process of converting nitrogen oxides (NOx) and sulfur dioxide (SO2) into particulate matter in the atmosphere is known as:
a) Photochemical smog formation
b) Acid rain formation
c) Greenhouse effect
d) Volcanic activity

Answer
a) Photochemical smog formation

Which of the following is a major greenhouse gas produced by ruminant animals during digestion?
a) Methane (CH4)
b) Carbon dioxide (CO2)
c) Nitrous oxide (N2O)
d) Water vapor (H2O)

Answer
a) Methane (CH4)

The “Kyoto Protocol” aimed to reduce emissions of greenhouse gases from industrialized
countries to combat:
a) Ozone depletion
b) Acid rain
c) Global warming
d) Water pollution

Answer
c) Global warming

The process of converting ammonia (NH3) and ammonium compounds into nitric acid
(HNO3) in the atmosphere is a major contributor to:
a) Acid rain
b) Photochemical smog formation
c) Greenhouse effect
d) Ozone depletion

Answer
a) Acid rain

The phenomenon of temperature inversion contributes to the formation of:
a) Acid rain
b) Photochemical smog
c) Greenhouse effect
d) Ozone hole

Answer
b) Photochemical smog

Which of the following pollutants is known to cause respiratory and cardiovascular diseases in humans?
a) Particulate matter (PM10)
b) Carbon monoxide (CO)
c) Sulfur dioxide (SO2)
d) Nitrogen oxides (NOx)

Answer
a) Particulate matter (PM10)

The “Love Canal” incident in the 1970s brought attention to the issue of:
a) Acid rain
b) Water pollution
c) Radioactive waste disposal
d) Air pollution

Answer
b) Water pollution

The process of converting carbon monoxide (CO) into carbon dioxide (CO2) in the atmosphere is known as:
a) Volcanic activity
b) Methane oxidation
c) Greenhouse effect
d) Photochemical smog formation

Answer
b) Methane oxidation

The process of converting sulfur dioxide (SO2) into sulfate aerosols in the atmosphere can have a cooling effect on the climate and is known as:
a) Greenhouse effect
b) Ozone depletion
c) Acid rain
d) Global dimming

Answer
d) Global dimming

The “Bhopal disaster” in 1984 was caused by the release of which toxic gas?
a) Sulfur dioxide (SO2)
b) Nitrogen oxides (NOx)
c) Methyl isocyanate (MIC)
d) Carbon monoxide (CO)

Answer
c) Methyl isocyanate (MIC)

Which of the following pollutants is a major component of photochemical smog?
a) Sulfur dioxide (SO2)
b) Carbon monoxide (CO)
c) Nitrogen oxides (NOx)
d) Methane (CH4)

Answer
c) Nitrogen oxides (NOx)

The “Minamata Convention” aims to address the issue of mercury pollution in:
a) Air
b) Water
c) Soil
d) All of the above

Answer
d) All of the above

The process of converting ammonia (NH3) and ammonium compounds into nitrogen oxides (NOx) in the atmosphere is a major contributor to:
a) Acid rain
b) Photochemical smog formation
c) Greenhouse effect
d) Ozone depletion

Answer
b) Photochemical smog formation

The “Deepwater Horizon” oil spill in 2010 had a significant impact on which marine
ecosystem?
a) Great Barrier Reef
b) Gulf of Mexico
c) Mediterranean Sea
d) Baltic Sea

Answer
b) Gulf of Mexico

The process of converting volatile organic compounds (VOCs) and nitrogen oxides (NOx)
into ground-level ozone (O3) is known as:
a) Acid rain formation
b) Greenhouse effect
c) Photochemical smog formation
d) Ozone depletion

Answer
c) Photochemical smog formation

Which of the following is a major contributor to indoor air pollution in homes and buildings?
a) Sulfur dioxide (SO2)
b) Carbon monoxide (CO)
c) Nitrogen oxides (NOx)
d) Methane (CH4)

Answer
b) Carbon monoxide (CO)

The process of converting methane (CH4) into carbon dioxide (CO2) in the atmosphere is known as:
a) Volcanic activity
b) Methane oxidation
c) Greenhouse effect
d) Photochemical smog formation

Answer
b) Methane oxidation

The process of converting sulfur dioxide (SO2) into sulfuric acid (H2SO4) in the atmosphere is a major contributor to:
a) Acid rain
b) Photochemical smog formation
c) Greenhouse effect
d) Ozone depletion

Answer
a) Acid rain

The “Fukushima Daiichi” nuclear disaster in 2011 resulted from a:
a) Nuclear explosion
b) Meltdown of nuclear reactors
c) Oil spill
d) Radiation leak from a research facility

Answer
b) Meltdown of nuclear reactors

Which of the following pollutants is a major component of smog and is responsible for reducing visibility in urban areas?
a) Sulfur dioxide (SO2)
b) Carbon monoxide (CO)
c) Nitrogen oxides (NOx)
d) Particulate matter (PM10)

Answer
d) Particulate matter (PM10)

The process of converting nitrogen oxides (NOx) into nitric acid (HNO3) is a major contributor to:
a) Acid rain
b) Photochemical smog formation
c) Greenhouse effect
d) Ozone depletion

Answer
a) Acid rain

The “Chernobyl disaster” in 1986 was caused by a:
a) Nuclear explosion
b) Meltdown of nuclear reactors
c) Oil spill
d) Radiation leak from a research facility

Answer
b) Meltdown of nuclear reactors

The process of converting methane (CH4) and carbon monoxide (CO) into carbon dioxide
(CO2) in the atmosphere is known as:
a) Methane oxidation
b) Greenhouse effect
c) Photochemical smog formation
d) Acid rain formation

Answer
a) Methane oxidation

The “Exxon Valdez” oil spill in 1989 had a significant impact on which marine ecosystem?
a) Great Barrier Reef
b) Gulf of Mexico
c) Mediterranean Sea
d) Prince William Sound, Alaska

Answer
d) Prince William Sound, Alaska

The process of converting volatile organic compounds (VOCs) and nitrogen oxides (NOx)
into ground-level ozone (O3) is known as:
a) Acid rain formation
b) Greenhouse effect
c) Photochemical smog formation
d) Ozone depletion

Answer
c) Photochemical smog formation

Which of the following pollutants is a major contributor to indoor air pollution in homes and buildings?
a) Sulfur dioxide (SO2)
b) Carbon monoxide (CO)
c) Nitrogen oxides (NOx)
d) Methane (CH4)

Answer
b) Carbon monoxide (CO)

The process of converting methane (CH4) into carbon dioxide (CO2) in the atmosphere is known as:
a) Volcanic activity
b) Methane oxidation
c) Greenhouse effect
d) Photochemical smog formation

Answer
b) Methane oxidation

The process of converting sulfur dioxide (SO2) into sulfuric acid (H2SO4) in the atmosphere is a major contributor to:
a) Acid rain
b) Photochemical smog formation
c) Greenhouse effect
d) Ozone depletion

Answer
a) Acid rain

The “Fukushima Daiichi” nuclear disaster in 2011 resulted from a:
a) Nuclear explosion
b) Meltdown of nuclear reactors
c) Oil spill
d) Radiation leak from a research facility

Answer
b) Meltdown of nuclear reactors

Which of the following pollutants is a major component of smog and is responsible for reducing visibility in urban areas?
a) Sulfur dioxide (SO2)
b) Carbon monoxide (CO)
c) Nitrogen oxides (NOx)
d) Particulate matter (PM10)

Answer
d) Particulate matter (PM10)

The process of converting nitrogen oxides (NOx) into nitric acid (HNO3) is a major contributor to:
a) Acid rain
b) Photochemical smog formation
c) Greenhouse effect
d) Ozone depletion

Answer
a) Acid rain

The “Chernobyl disaster” in 1986 was caused by a:
a) Nuclear explosion
b) Meltdown of nuclear reactors
c) Oil spill
d) Radiation leak from a research facility

Answer
b) Meltdown of nuclear reactors

The process of converting methane (CH4) and carbon monoxide (CO) into carbon dioxide
(CO2) in the atmosphere is known as:
a) Methane oxidation
b) Greenhouse effect
c) Photochemical smog formation
d) Acid rain formation

Answer
a) Methane oxidation

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