This practice/revision test includes 25 important multiple choice questions from the Class 12th Biology NCERT chapter - Environmental Issues.
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Q.1.
Which chemical substance affects the Ozone Layer?
- Chlorofluorocarbon
- Chlorine
- Hexafluorocarbon
- Molecular Carbon
Answer:
(a) Chlorofluorocarbon
Explanation: Chlorofluorocarbon affects the Ozone Layer.
Explanation: Chlorofluorocarbon affects the Ozone Layer.
Q.2.
In Ozone Degradation which element acts as catalyst?
- Chlorine
- Flurine
- Oxygen
- Potassium
Answer:
(a) Chlorine
Explanation: Chlorine acts as catalyst in ozone degradation.
Explanation: Chlorine acts as catalyst in ozone degradation.
Q.3.
Ozone Layer is found in
- Stratosphere
- Lithosphere
- Troposphere
- Hemisphere
Answer:
(a) Stratosphere
Explanation: Ozone Layer is found in Stratosphere
Explanation: Ozone Layer is found in Stratosphere
Q.4.
Acid Rain comes under which type of pollution?
- Water pollution
- Air pollution
- Soil pollution
- Sound Pollution
Answer:
(c) Soil pollution
Explanation: Acid Rain comes under Soil pollution.
Explanation: Acid Rain comes under Soil pollution.
Q.5.
Environment (Protection) Act came into force in?
- 1986
- 1989
- 1992
- 1993
Answer:
(c) 1992
Explanation: 1992
Explanation: 1992
Q.6.
Bhopal gas tragedy of 1884 took place because methyl isocyanate reacted with
- DDT
- Ammonia
- CO2
- Water
Answer:
(c) CO2
Explanation: Bhopal gas tragedy of 1884 took place because methyl isocyanate reacted with CO2
Explanation: Bhopal gas tragedy of 1884 took place because methyl isocyanate reacted with CO2
Q.7.
Chlorofluoro carbon are responsible for
- Acid rain
- Ozone layer depletion
- Global warming
- Thermal inversion
Answer:
(d) Thermal inversion
Explanation: Chlorofluoro carbon are responsible for Thermal inversion
Explanation: Chlorofluoro carbon are responsible for Thermal inversion
Q.8.
Fluoride pollution mainly affect
- Teeth
- Kidney
- Brain
- Heart
Answer:
(a) Teeth
Explanation: Fluoride pollution mainly affect Teeth
Explanation: Fluoride pollution mainly affect Teeth
Q.9.
Nutrient enrichment of water bodies causes
- Stratification
- Eutrophication
- Succession
- None of these
Answer:
(b) Eutrophication
Explanation: Nutrient enrichment of water bodies causes Eutrophication
Explanation: Nutrient enrichment of water bodies causes Eutrophication
Q.10.
Increased skin cancer and high mutation rate are due to
- Acid Rain
- Ozone Depletion
- CO2 Pollution
- CO Pollution
Answer:
(b) Ozone Depletion
Explanation: Increased skin cancer and high mutation rate are due to Ozone Depletion
Explanation: Increased skin cancer and high mutation rate are due to Ozone Depletion
Q.11.
Natural air pollutant are
- Pollen Grains
- Gases of Volcanic Eruption
- Aerosol
- Fluorides
Answer:
(b) Gases of Volcanic Eruption
Explanation: Natural air pollutant are Gases of Volcanic Eruption
Explanation: Natural air pollutant are Gases of Volcanic Eruption
Q.12.
Which one of the following is not a greenhouse gas?
- Methane
- CO2
- Chlorofluoro carbon
- Hydrogen
Answer:
(d) Hydrogen
Explanation: Hydrogen is not a greenhouse gas.
Explanation: Hydrogen is not a greenhouse gas.
Q.13.
Minimata disease is caused by
- ByChromium
- By Cadmium
- By Methyl mercury
- By Radioactive elements
Answer:
(c) By Methyl mercury
Explanation: Minimata disease is caused by Methyl mercury.
Explanation: Minimata disease is caused by Methyl mercury.
Q.14.
Bluebaby syndrome results from
- Excess of TDS
- Excess of DO
- Excess of chloride
- Methaemoglobin
Answer:
(d) Methaemoglobin
Explanation: Bluebaby syndrome results from Methaemoglobin
Explanation: Bluebaby syndrome results from Methaemoglobin
Q.15.
A mutagenic pollutant is:
- Organophosphate
- Resines
- Hydrocarbons
- Nitrogen oxides
Answer:
(c) Hydrocarbons
Explanation: A mutagenic pollutant is Hydrocarbons
Explanation: A mutagenic pollutant is Hydrocarbons
Q.16.
Rain is called acid rain, its pH is below:
- 7
- 6.5
- 6
- 5.6
Answer:
(d) 5.6
Explanation: 5.6
Explanation: 5.6
Q.17.
Common indicator organism of water pollution is
- Lemna pancicostata
- Eichhomia crassipes
- Escherichia coli
- Entamoeba histolytica
Answer:
(c) Escherichia coli
Explanation: Common indicator organism of water pollution is Escherichia coli
Explanation: Common indicator organism of water pollution is Escherichia coli
Q.18.
Pollution of SO2 destroys
- Lichen
- Fungi
- Algae
- Fish
Answer:
(a) Lichen
Explanation: Pollution of SO2 destroys SO2
Explanation: Pollution of SO2 destroys SO2
Q.19.
Act formulated in 1996 was
- Insecticide Act
- Air (Prevention and Control of Pollution) Act
- Water (Prevention and control of Pollution) Act
- Environment protection Act
Answer:
(d) Environment protection Act
Explanation: Environment protection Act
Explanation: Environment protection Act
Q.20.
Permissible noise levels in a residential area at night time is
- 35 dB
- 40 dB
- 45 dB
- 50 dB
Answer:
(c) 45 dB
Q.21.
The natural aging of the lake is called
- Biomagnification
- Eutrophication
- BOD
- None of the above
Answer:
(b) Eutrophication
Explanation: The natural aging of the lake is called Eutrophication
Explanation: The natural aging of the lake is called Eutrophication
Q.22.
The agents that bring undesirable changes in the environment arc called
- Pollution
- Fragments
- Pollutants
- None of the above
Answer:
(c) Pollutants
Explanation: These are known as pollutants.
Explanation: These are known as pollutants.
Q.23.
Particulate matter can be removed by
- Catalytic converter
- Converter
- Radioactive converter
- Electrostatic converter
Answer:
(d) Electrostatic converter
Explanation: Particulate matter can be removed by Electrostatic converter
Explanation: Particulate matter can be removed by Electrostatic converter
Q.24.
The petrol used in engines filled with catalytic converter should be
- Simple petrol
- Any type of petrol
- Unleaded petrol
- None of the above
Answer:
(c) Unleaded petrol
Explanation: The petrol used in engines filled with catalytic converter should be Unleaded petrol
Explanation: The petrol used in engines filled with catalytic converter should be Unleaded petrol
Q.25.
Which metal inactivates a catalytic converter?
- Gold
- Iron
- Silvers
- Lead
Answer:
(d) Lead
Explanation: Lead inactivates a catalytic converter.
Explanation: Lead inactivates a catalytic converter.
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