Has been stable over the history of the planet

Will stabilize over the next century, according to the predictions of most scientists

Has been documented to have changed once due to the evolution of green photosynthesizing plants

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NEET • BIOLOGY • ENVIRONMENTAL ISSUES

Environmental issues practice · Mixed difficulty

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Showing 91-120 of 245 questions

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91 Hard

91 of 245

Understanding +4 | -1

Select the correct arrangement according of the types of ultraviolet radiations according to the intensity of their effect on human skin.

View answer and explanation

Correct option: B

UV\mathrm{ - }B > UV\mathrm{ - }C > UV\mathrm{ - }A

Option C (

UV\mathrm{ - }C > UV\mathrm{ - }B > UV\mathrm{ - }A

) is incorrect. The correct option is

UV\mathrm{ - }B > UV\mathrm{ - }C > UV\mathrm{ - }A

. UV-B has the most intense effect on human skin, followed by UV-C and then UV-A.

92 Medium

92 of 245

Analyzing +4 | -1

Assertion: Through the use of catalytic
converters, unburnt hydrocarbons are changed
into carbon monoxide which in turn is changed
into nitrogen oxides and water.

Reason: Motor vehicles equipped with catalytic
converters should use leaded petrol to protect
the catalyst from degradation.

View answer and explanation

Correct option: D

If both Assertion and Reason are false

Option D (If both Assertion and Reason are false) is correct because catalytic converters change unburnt hydrocarbons into carbon dioxide and water, and leaded petrol damages the catalyst.

93 Medium

93 of 245

Understanding +4 | -1

Carbon dioxide is called green house gas because it is

View answer and explanation

Correct option: C

Transparent to sunlight but traps heat

Option C (Transparent to sunlight but traps heat) is correct because carbon dioxide allows sunlight to pass through but absorbs and re-emits infrared radiation (heat).

94 Medium

94 of 245

Remembering +4 | -1

Which one of the following pesticides is banned now-a-days?

View answer and explanation

Correct option: A

DDT

Option A (DDT) is correct because DDT is a persistent pesticide that has been banned in many countries due to its harmful effects on the environment and human health.

95 Easy

95 of 245

Remembering +4 | -1

The ozone layer is found in

View answer and explanation

Correct option: C

Stratosphere

Option C (Stratosphere) is correct because the ozone layer, which absorbs harmful UV radiation, is primarily located in the stratosphere.

96 Easy

96 of 245

Understanding +4 | -1

Earth’s climate

View answer and explanation

Correct option: B

Is changing as a result of natural and human processes

Option B (Is changing as a result of natural and human processes) is correct because Earth's climate is influenced by both natural variations and human activities.

97 Medium

97 of 245

Understanding +4 | -1

Addition of phosphate and nitrates/fertiliser into water and that water ultimately draining into lake firstly affects

View answer and explanation

Correct option: A

Growth of aquatic organisms in lake

Option A is correct because the initial effect of increased nutrients (phosphates and nitrates) is the stimulation of growth of aquatic organisms, particularly algae.

98 Medium

98 of 245

Understanding +4 | -1

DDT residues are rapidly passed through food chain causing biomagnifications because DDT is

View answer and explanation

Correct option: A

Lipo soluble

Option A (Lipo soluble) is correct because DDT is fat-soluble (liposoluble), which allows it to accumulate in the fatty tissues of organisms and biomagnify through the food chain.

99 Easy

99 of 245

Remembering +4 | -1

…….. is an undesirable change in physical, chemical or biological characteristics of air, land, water or soil

View answer and explanation

Correct option: A

Pollution

Option A (Pollution) is correct because pollution is defined as an undesirable change in the physical, chemical, or biological characteristics of the environment.

100 Easy

100 of 245

Remembering +4 | -1

In which state of India, Ecosave toilets are not found?

View answer and explanation

Correct option: B

Delhi

Option B is correct because Ecosave toilets are primarily found in Kerala and Sri Lanka, focusing on ecological sanitation, and are not typically implemented in Delhi.

101 Medium

101 of 245

Remembering +4 | -1

Amrita Devi Bishnoi wildlife protection award is for the individuals or communities from rural areas that have extraordinary courage in

View answer and explanation

Correct option: D

Protecting wildlife

Option D (Protecting wildlife) is the correct answer because the Amrita Devi Bishnoi award recognizes courage in wildlife conservation.

102 Hard

102 of 245

Remembering +4 | -1

What it is called when thousands of aquatic species are killed over a wide range in sea.

View answer and explanation

Correct option: B

El Nino effect

Option B (El Nino effect) is correct because El Nino is associated with widespread aquatic species mortality.

103 Easy

103 of 245

Remembering +4 | -1

In the town of Arcata situated on northern coast of …A… , an integrated waste water treatment process was developed with the help of biologists from …B… . Here A and B refers to

View answer and explanation

Correct option: B

A-California; B-Humboldt State University

Option B (A-California; B-Humboldt State University) is correct because Arcata is in California, and the project involved Humboldt State University biologists.

104 Easy

104 of 245

Remembering +4 | -1

Which of the following is not a green house gas?

View answer and explanation

Correct option: D

Oxygen

Option D (Oxygen) is correct because oxygen is not a greenhouse gas; it does not trap heat in the atmosphere.

105 Medium

105 of 245

Remembering +4 | -1

In India, the Air Prevention and Control of pollution Act came into force in …A…, but was amended in …B… to include …C… as an air pollutant
Complete the given statement by choosing appropriate option for A-C

View answer and explanation

Correct option: B

A-1981, B-1987, C-noise

Option B (A-1981, B-1987, C-noise) is correct because the Air Prevention and Control of Pollution Act came into force in 1981 and was amended in 1987 to include noise as an air pollutant.

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106 Easy

106 of 245

Remembering +4 | -1

‘Bad’ ozone is formed in

View answer and explanation

Correct option: D

Troposphere

Option D (Troposphere) is correct because 'bad' ozone, which is harmful to human health and the environment, is formed at ground level in the troposphere.

107 Hard

107 of 245

Understanding +4 | -1

There are several ways of looking at living thing, one which is at the molecular level and analytical level with regard to life could vary nearly come to:

View answer and explanation

Correct option: B

Matter energy interaction

Option B (Matter energy interaction) is correct because life at the molecular and analytical level involves interactions between matter and energy.

108 Easy

108 of 245

Understanding +4 | -1

Assertion : Water pollutants are measured by
BOD.

Reason : If BOD is more, the water is polluted.

View answer and explanation

Correct option: A

If both Assertion and Reason are true and
Reason is the correct explanation of Assertion

Option A (If both Assertion and Reason are true and Reason is the correct explanation of Assertion) is correct because BOD is indeed used to measure water pollutants, and a higher BOD indicates more pollution due to increased organic matter.

109 Medium

109 of 245

Understanding +4 | -1

Which of the following are correctly matched?
I. Arsenic poisoning - Black foot disease
II. Secondary effluent
treatment - Biological process
III. Pyrolysis - Solid soil waste disposal
IV. Tubifex - Water pollution indicator
V. Biomagnification - Degradable pollutants

View answer and explanation

Correct option: D

I,II,III and IV

Option D (I,II,III and IV) is correct because Arsenic poisoning causes black foot disease, Secondary effluent treatment is a biological process, Pyrolysis is a method for solid waste disposal, and Tubifex worms are indicators of water pollution.

110 Medium

110 of 245

Understanding +4 | -1

Which of the following is absent in polluted water?

View answer and explanation

Correct option: C

Larva of stone fly

Option C (Larva of stone fly) is correct because stonefly larvae are highly sensitive to pollution and are typically absent in polluted water due to their need for high oxygen levels.

111 Easy

111 of 245

Understanding +4 | -1

Green house effect with respect to global climate refers to

View answer and explanation

Correct option: B

Warming effect

Option B (Warming effect) is correct because the greenhouse effect traps heat in the atmosphere, leading to global warming.

112 Medium

112 of 245

Analyzing +4 | -1

Assertion : Global warming (Green house
effect) occurs due to penetrability of low
wavelength radiation through ozone layer.

Reason : CFC is green house gas which results
in impenetrability of long wave length radiation
through

C{O_2}

of the atmosphere.

View answer and explanation

Correct option: A

If both Assertion and Reason are true and
Reason is the correct explanation of Assertion

Option D (If both Assertion and Reason are false) is correct because global warming is due to the trapping of long-wavelength radiation, and CFCs do not cause impenetrability of long-wavelength radiation through CO2.

113 Easy

113 of 245

Remembering +4 | -1

Which element is caused of itai-itai disease?

View answer and explanation

Correct option: C

Option C (Cd) is correct because Itai-Itai disease is caused by cadmium poisoning.

114 Medium

114 of 245

Analyzing +4 | -1

A: CNG burns more efficiently than diesel.

R: CNG is cheaper than petrol or diesel.

View answer and explanation

Correct option: B

Assertion & Reason are true but the reason is not the correct explanation of the assertion

Option B (Assertion & Reason are true but the reason is not the correct explanation of the assertion) is correct because CNG burns more efficiently, and CNG is cheaper, but the cheapness doesn't cause the efficiency.

115 Easy

115 of 245

Understanding +4 | -1

A pollutant can best defined as it

View answer and explanation

Correct option: B

Changes homeostasis of environment

Option B (Changes homeostasis of environment) is correct because pollutants disrupt the natural balance of the environment.

116 Medium

116 of 245

Understanding +4 | -1

The possible beneficial aspect of grazing animals is the

View answer and explanation

Correct option: D

Addition of their excreta into the soil

Option D (Addition of their excreta into the soil) is correct because animal excreta acts as a natural fertilizer, enriching the soil.

117 Medium

117 of 245

Remembering +4 | -1

Which of the following methods are useful for solid waste disposal?
I. Open burning
II. Sanitary landfills
III. Rag-pickers and kabadiwallahs
IV. Natural breakdown
V. Recycling
VI. Incineration
Choose the correct option

View answer and explanation

Correct option: D

I, II, III, IV, V and VI

Option D (I, II, III, IV, V and VI) is correct because all listed methods (open burning, sanitary landfills, rag-pickers, natural breakdown, recycling, and incineration) are used for solid waste disposal, although some are more environmentally sound than others.

118 Easy

118 of 245

Understanding +4 | -1

The amount of biodegradable organic matter in sewage water can be estimated by measuring

View answer and explanation

Correct option: B

Biochemical oxygen demand

Option B (Biochemical oxygen demand) is correct because BOD specifically measures the amount of oxygen required by microorganisms to decompose biodegradable organic matter in water.

119 Hard

119 of 245

Remembering +4 | -1

In the last decades, most serious nuclear reactor accident created MIC gas tragedy in

View answer and explanation

Correct option: B

Ukraine (1986) and Bhopal (1984)

Option B (Ukraine (1986) and Bhopal (1984)) is correct because the Chernobyl disaster in Ukraine occurred in 1986, and the Bhopal gas tragedy in India occurred in 1984.

120 Medium

120 of 245

Remembering +4 | -1

Without greenhouse effect the average temperature at surface of earth would have been:-

View answer and explanation

Correct option: A

- 18^\circ \,C

Option A (-18° C) is correct because without the greenhouse effect, the Earth's average surface temperature would be significantly lower, estimated to be around -18°C.

Revision notes and key takeaways

Review ENVIRONMENTAL ISSUES in your textbook or class notes, then use this set to check your understanding.

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Environmental issues practice · Mixed difficulty

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