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Home > NCERT Solutions > Tripura Board > Class 12 > Biology > Biology > Chapter 16 Environmental Issues

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TextBook Solutions for Tripura Board Class 12 Biology Chapter 16 Environmental Issues

Question 1

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In the scrubber in the electrostatic precipitator the gases are passed through :
filter
lime
spray of water
both 2 and 3

Solution

both 2 and 3

Question 2

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Ozone depletion will cause :
Forest fire
Pneumonia
Increased incidence of skin cancer
None of these

Easy

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Question 3

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The meaning of BOD is :
Bacterial oxygen demand
Biological optimum density
Biochemical oxygen demand
Bioorganisation decay

Easy

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Question 4

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Which of the following pollutants is not produced by exhaust of motor vehicles ?
CO
Hydrocarbon
Fly-ash
NO

Easy

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Question 5

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What is the term for the inflammation of cornea due to high absorption of UV-B radiation :
myopia
snow blindness
biomagnification
None of the above

Easy

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Question 6

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Smog is a mixture of :
Aluminium ions
Methane and ozone
smoke and fog
water and smoke

Easy

View solution

Question 7

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WHO’s recommendations about the industrial noise limit is of :
105 dB
75 dB
135 dB
165 dB

Easy

View solution

Question 8

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Which of the atmospheric layer contains ozone layer ?
Troposphere
Stratosphere
Mesosphere
Thermosphere

Easy

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Question 9

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The amount of dissolved oxygen required by the microorganisms to degrade the organic wastes present in water is called ?
Biomagnification
Eutrophication
BOD
COD

Easy

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Question 10

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The cause of acid rain is :
CO₂ and CO
SO₂ and NO2
SO₃ and CO
Ozone and dust

Easy

View solution

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TextBook Solutions for Tripura Board Class 12 Biology Chapter 16 Environmental Issues

In the scrubber in the electrostatic precipitator the gases are passed through :
filter
lime
spray of water
both 2 and 3

Ozone depletion will cause :
Forest fire
Pneumonia
Increased incidence of skin cancer
None of these

The meaning of BOD is :
Bacterial oxygen demand
Biological optimum density
Biochemical oxygen demand
Bioorganisation decay

Which of the following pollutants is not produced by exhaust of motor vehicles ?
CO
Hydrocarbon
Fly-ash
NO

What is the term for the inflammation of cornea due to high absorption of UV-B radiation :
myopia
snow blindness
biomagnification
None of the above

Smog is a mixture of :
Aluminium ions
Methane and ozone
smoke and fog
water and smoke

WHO’s recommendations about the industrial noise limit is of :
105 dB
75 dB
135 dB
165 dB

Which of the atmospheric layer contains ozone layer ?
Troposphere
Stratosphere
Mesosphere
Thermosphere

The amount of dissolved oxygen required by the microorganisms to degrade the organic wastes present in water is called ?
Biomagnification
Eutrophication
BOD
COD

The cause of acid rain is :
CO₂ and CO
SO₂ and NO2
SO₃ and CO
Ozone and dust

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

For Daily Free Study Material Join wiredfaculty

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Download Android App

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TextBook Solutions for Tripura Board Class 12 Biology Chapter 16 Environmental Issues

In the scrubber in the electrostatic precipitator the gases are passed through : filterlimespray of waterboth 2 and 3

Ozone depletion will cause : Forest fire Pneumonia Increased incidence of skin cancer None of these

The meaning of BOD is : Bacterial oxygen demandBiological optimum densityBiochemical oxygen demandBioorganisation decay

Which of the following pollutants is not produced by exhaust of motor vehicles ? COHydrocarbonFly-ashNO

What is the term for the inflammation of cornea due to high absorption of UV-B radiation : myopiasnow blindnessbiomagnificationNone of the above

Smog is a mixture of : Aluminium ionsMethane and ozonesmoke and fogwater and smoke

WHO’s recommendations about the industrial noise limit is of : 105 dB75 dB135 dB165 dB

Which of the atmospheric layer contains ozone layer ? TroposphereStratosphereMesosphereThermosphere

The amount of dissolved oxygen required by the microorganisms to degrade the organic wastes present in water is called ? BiomagnificationEutrophicationBODCOD

The cause of acid rain is : CO2 and COSO2 and NO2SO3 and COOzone and dust

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

In the scrubber in the electrostatic precipitator the gases are passed through :
filter
lime
spray of water
both 2 and 3

Ozone depletion will cause :
Forest fire
Pneumonia
Increased incidence of skin cancer
None of these

The meaning of BOD is :
Bacterial oxygen demand
Biological optimum density
Biochemical oxygen demand
Bioorganisation decay

Which of the following pollutants is not produced by exhaust of motor vehicles ?
CO
Hydrocarbon
Fly-ash
NO

What is the term for the inflammation of cornea due to high absorption of UV-B radiation :
myopia
snow blindness
biomagnification
None of the above

Smog is a mixture of :
Aluminium ions
Methane and ozone
smoke and fog
water and smoke

WHO’s recommendations about the industrial noise limit is of :
105 dB
75 dB
135 dB
165 dB

Which of the atmospheric layer contains ozone layer ?
Troposphere
Stratosphere
Mesosphere
Thermosphere

The amount of dissolved oxygen required by the microorganisms to degrade the organic wastes present in water is called ?
Biomagnification
Eutrophication
BOD
COD

The cause of acid rain is :
CO₂ and CO
SO₂ and NO2
SO₃ and CO
Ozone and dust