Waste from nuclear power generation

MCQ Questions for Class 12 Medical Biology Environmental Issues Quiz 1

Which of these following methods is the most suitable for disposal of nuclear waste?

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Shoot the waste into space
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Bury the waste under Antarctic ice-cover
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Dump the waste within rocks under deep ocean
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Bury the waste within rocks deep below the Earth's surface

Depletion of which gas in the atmosphere can lead to an increase incidence of skin cancers?

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Nitrous oxide
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Ozone
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Ammonia
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Methane

When domestic sewage mixes with river water

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The river water is still suitable for drinking as impurities are only about 0.1%.
0%
Small animals like rats will die after drinking river water.
0%
The increased microbial activity releases micronutrients such as iron.
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The increased microbial activity uses up dissolved oxygen.

Biochemical Oxygen Demand (BOD) may not be a good index for pollution for water bodies receiving effluents from

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Petroleum industry
0%
Sugar industry
0%
Domestic sewage
0%
Dairy industry

High value of BOD (Biochemical Oxygen Demand) indicates

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Water is less polluted
0%
Consumption of organic matter in the water is higher by the microbes
0%
Water is pure
0%
None of these

World ozone day is celebrated on __________

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$16^{th}$ September
0%
$5^{th}$ June
0%
$22^{nd}$ April
0%
$21^{st}$ April

Explanation

16 $^{th}$ september is celebrated as world ozone day
5 $^{th}$ June is celebrated as world environment day.
22 $^{nd}$ april is celebrated as Earth day.
21 $^{st}$ april is celebrated as civil services day.

So, the correct answer is option A.

Ozone in stratosphere extends

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10-20km
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20-25km
0%
15-30km
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25-40km

The stratospheric ozone depletion leads to?

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Global warming
0%
Increase in the incidence of skin cancers
0%
Forest fires
0%
All of the above

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Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
0%
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
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Assertion is correct but Reason is incorrect.
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Both Assertion and Reason are incorrect.

Explanation

Chlorofluorocarbons are responsible for ozone depletion. After the release of CFCs into the troposphere, CFCs go to the stratosphere where they are broken down by UV radiations releasing chlorine. In presence of sunlight chlorine breaks O

$_3$ into O

$_2$

The reason is correct but not correct explanation of assertion as, due to ozone depletion, its levels decreases by 67% every year causing higher levels of UV radiations reaching earth which may cause eye cataracts, skin cancer etc.

Therefore, the correct answer is option B.

Biological Oxygen Demand (BOD) is a measure of

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Industrial wastes poured into water bodies
0%
Extent to which water is polluted with organic compound
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Amount of carbon monoxide inseparably combined with haemoglobin
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Amount of oxygen needed by green plants during night

Assertion :Presently, the global atmosphere is warming up.

Reason :The depletion of stratospheric ozone layer has resulted in increase in ultraviolet radiations reaching the earth.

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If both the assertion and the reason are true and the reason is a correct explanation of the assertion
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If both the assertion and reason are true but the reason is not a correct explanation of the assertion
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If the assertion is true but the reason is false
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If both the assertion and reason are false
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If the assertion is false but reason is true

Explanation

The warming up of global atmosphere present day is due to the increase in green house effect. Green house effect (GHE) describe the roles of water vapour,

$CO_2$ and other trace gases in keeping the Earth's surface warmer than it would be otherwise.These radiatively active gases are relatively transparent to incoming shortwave radiation (visible spectrum), but are relatively opaque to outgoing reradiating (infrared rays) longwave radiation. The latter radiation, which would otherwise escape to space, is trapped by these gases within the lower levels of the atmosphere. The subsequent reradiation of some of the energy back to the surface maintains surface temperature higher than they would be if the gases were absent (without the green house effect the Earth's average global temperature would be 18 degree celsius rather than the present 15 degree celsius). There is concern that increasing concentration of the green house gases including CO2, CH4, and man made chlorofluorocarbons (CFCS), may enhance the green house effect and cause global warming. Ozone layer present in the stratosphere is depleted by the aerosols and chloroflurocarbons. Ozone protects the earth from high energy ultra violet radiation. So, the correct answer is 'If both the assertion and reason are true but the reason is not a correct explanation of the assertion'

In vehicles, catalytic converters are used

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To increase mileage of vehicles
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To convert $\displaystyle { CO }_{ 2 }$ into carbonates
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To increase the efficiency of lead mixed petrol
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To convert $\displaystyle CO$ to $\displaystyle { CO }_{ 2 }$

Biological Oxygen Demand (BOD) is a measure of

0%
Industrial wastes poured into water bodies.
0%
Extent to which water is polluted with organic compounds.
0%
Amount of carbon monoxide inseparably combined with haemoglobin.
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Amount of oxygen needed by green plants during night.

A large quantity of urban sewage is drained into nearby village river. Which among the given conditions would happen after mixing of sewage into the river?
(i) Biochemical oxygen demand (BOD) of receiving water body increases.
(ii) Dissolved oxygen of receiving water body decreases.
(iii) It will not cause mortality among fishes and other aquatic creatures.
(iv) It will lead to the nutrient enrichment of receiving water body.

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(i), (ii) and (iii)
0%
(i), (ii) and (iv)
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(ii) and (iii) only
0%
(iii) and (iv) only

Which of the following statements is correct?

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Catalytic converter can separate particulate matter of diameter less than 2.5 micrometers.
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Histones are acidic in nature that form core for DNA packaging.
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Lactobacillus is not present in dough used in idli formation.
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Template with polarity 5' - 3' has continuous DNA replication.

According to origin, identify the secondary air pollutant.

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$SO_2$
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Ash
0%
Ozone
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Radioactive compound

Greenhouse effect is due to the presence of

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Ozone layer in the atmosphere
0%
Infrared light reaching the earth
0%
Moisture layer in the atmosphere
0%
CO $_2$ layer in the atmosphere

Decrease in species diversity in tropical countries is mainly due to

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Urbanisation
0%
Pollution
0%
Deforestation
0%
Soil erosion

The ozone layer in earth's atmosphere is crucial for human survival because it

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Has ions
0%
Reflects radio signals
0%
Reflects ultraviolet rays
0%
Reflects infrared rays

Which one is not dangerous for life and atmosphere?

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Biopollutants
0%
Ozone layer
0%
Nuclear blast
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Deforestation

Which of the following is not a greenhouse gas?

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$N_2O$
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CFC
0%
$O_3$
0%
$SO_2$

Among the most dangerous non-biodegradable waste is

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cow-dung
0%
plastic articles
0%
garbage
0%
radioactive waste

Excessive exposure of humans to UV-rays results in

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damage to immune system
0%
damage to lungs
0%
skin cancer
0%
peptic ulcers

Which of the following organism is likely to have more concentration of D.D.T in its body?

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Herbivores
0%
Carnivores
0%
Top carnivores
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Primary producers

Explanation

$\textbf{Correct option:}$

$\textbf{(C)}$

$\textbf{Solution:}$

$\bullet$ Persistent pesticides, such as organochlorines or chlorinated hydrocarbons like DDT, enter the food chain and accumulate in animal fat, increasing the amount per unit weight of creatures as the trophic level rises.

$\bullet$ Biomagnification, bioconcentration, or biological amplification are all terms used to describe this phenomena.

$\bullet$ The greater an organism's trophic level in a food chain, the higher the level of bioaccumulation.

$\bullet$ As a result, the highest concentration of persistent DDT in the body is likely to be seen in top carnivores.

$\textbf{Thus the Correct option is (C)}$

The result of ozone hole is

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Acid rain
0%
UV radiations reach the surface of earth
0%
Global warming
0%
Green house effect

.................. has destructive effects on the entire ecosystem.

0%
Radioactive pollution
0%
Noise pollution
0%
Soil pollution
0%
Water pollution

What does e-waste stand for?

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environment Waste
0%
electronic Waste
0%
equipment Waste
0%
All of the above

In which of the following year, the depletion of the ozone layer have been noticed?

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1979
0%
1980
0%
1981
0%
1982

Discarded electronic items are categorized under

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Industrial waste
0%
Domestic waste
0%
Hazardous waste
0%
Electronic waste

______ can cause sea levels to rise dramatically.

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Global warming
0%
Rock slide
0%
Water pollution
0%
Air pollution

What happen when the destruction of the ozone layer increases?

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The amount of harmful ultraviolet radiation
0%
The amount of needful ultraviolet radiation
0%
The amount of ultra radiations
0%
None of these

What is e-waste?

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Hazardous chemical waste
0%
Waste electronic equipment
0%
Waste from nuclear power generation
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Environmental friendly waste

What is the toxic substance contained by typical electronic waste?

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PCBs
0%
Dioxin
0%
Pesticide-like compounds
0%
Heavy metals

Different examples of waste are

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Electronic waste
0%
Waste water
0%
Hazardous waste
0%
All of the above

What is the single greatest source of solid waste?

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Mining
0%
Municipalities
0%
Agriculture
0%
Industry

Which of the following reduce(s) air pollution?
(i) Using an incinerator
(ii) Using renewable energy
(iii) Fixing catalytic converters in vehicles

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Only (i)
0%
(ii) and (iii)
0%
(i) and (iii)
0%
(i), (ii) and (iii)

Ozone is present as a chief constituent in which region of the atmosphere?

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Troposphere
0%
Stratosphere
0%
Mesosphere
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Thermosphere

Depending upon the amount of radioactivity, there are ........ type of radioactive waste

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Two
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Five
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Four
0%
Six

Which of the following is used to treat radioactive waste?

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Ammonia to neutralize it
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Bacteria to consume it
0%
Storage until it gets harmless
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Acid to decompose it

Which of the following cause green house effect?
(i) Deforestation
(ii) Emission of gases from factories
(iii) Melting of polar ice

0%
Only (i) and (ii)
0%
Only (i) and (iii)
0%
Only (ii) and (ii)
0%
(i), (ii) and (iii)

Explanation

Deforestation is removal, decrease or deterioration of forest cover of an area. It causes the change in climate, floods, soil erosion, siltation, cyclones, drought, desertification and increased level of carbon dioxide (greenhouse gas) in the atmosphere. Greenhouse gases like carbon dioxide and CH

$_4$ that are also released from factories cause green house effect.

Waste from hospitals are known as

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Industrial waste
0%
Biomedical waste
0%
Biomagnification
0%
Eutrophication

What does bioaccumulation mean?

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Accumulation of substance
0%
Absorption of substance
0%
Accommodation of substance
0%
None of these

Growing more trees would .....

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Increase noise pollution.
0%
Decrease noise pollution.
0%
Have no effect on noise pollution.
0%
Reduce noise pollution to zero.

Which country produces the most e-waste per year?

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Britain
0%
China
0%
India
0%
USA

Nuclear wastes are rich in

0%
Radioactive material
0%
Electronic material
0%
Carbon dioxide
0%
None of the above

Organic farming is raising crops through use of

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Biofertilizers
0%
Manures
0%
Resistant varieties
0%
All of the above

Extensive planting of trees to increase forest cover is called

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Afforestation
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Agroforestry
0%
Deforestation
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Social forestry

Pallavi got PUC certificate for her vehicle which indicates which of the following criteria for the vehicle?

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It has low rate of emission
0%
It is equipped with new technology
0%
It has greater fuel capacity
0%
None of the above

Plants remove carbon in the form of:

0%
Carbonates
0%
Carbon monoxide
0%
Bicarbonates
0%
Carbon dioxide

Cyclone collectors and electrostatic precipitators are meant for controlling.

0%
Sewage pollution
0%
Air pollution
0%
Pesticide pollution
0%
Natural pollution

CBSE Questions for Class 12 Medical Biology Environmental Issues Quiz 1 - MCQExams.com

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Practice Class 12 Medical Biology Quiz Questions and Answers

CBSE Questions for Class 12 Medical Biology Environmental Issues Quiz 1 - MCQExams.com

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Practice Class 12 Medical Biology Quiz Questions and Answers

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