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Test: Environmental Issues - 2 (Old NCERT) - NEET MCQ


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25 Questions MCQ Test Biology Practice Tests: CUET Preparation - Test: Environmental Issues - 2 (Old NCERT)

Test: Environmental Issues - 2 (Old NCERT) for NEET 2024 is part of Biology Practice Tests: CUET Preparation preparation. The Test: Environmental Issues - 2 (Old NCERT) questions and answers have been prepared according to the NEET exam syllabus.The Test: Environmental Issues - 2 (Old NCERT) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Environmental Issues - 2 (Old NCERT) below.
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Test: Environmental Issues - 2 (Old NCERT) - Question 1

Smog which doesn’t contain any secondary pollutants is:

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 1

Correct Answer :- a

Explanation : Classical smog does not contain any secondary pollutants. It is a mixture of fog, sulfur dioxide and coal smoke particulates

Photochemical smog is composed of primary and secondary pollutants.Primary pollutants, which include nitrogen oxides and volatile organic compounds, are introduced into the atmosphere via vehicular emissions and industrial processes.Secondary pollutants, like ozone, result from the reaction of primary pollutants with ultraviolet light. It is most common in sunny and dry cities, like Los Angeles.

Test: Environmental Issues - 2 (Old NCERT) - Question 2

Read the following statements:
i. carbondioxide is a qualitative pollutant.
ii. carbondioxide is already present in environment and is termed as pollutant when it’s concentration increases in the environment:

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 2

Carbon dioxide is a quantitative pollutant. This gas is already present in environment in small quantity. When its concentration increases in the environmentit is termed as pollutant. It may cause greenhouse effect also.

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Test: Environmental Issues - 2 (Old NCERT) - Question 3

The dust collection efficiency of Electrostatic precipitator is affected by the particle size of the aerosol to be collected, so :

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 3

Electrostatic precipitator is used to remove particulate matters from chimneys of factories. The dust collection efficiency of electrostatic precipitator is affected by the particle siz of the aerosol to be collected so, the collection efficiency is high for large particles and low for the small particles.

Test: Environmental Issues - 2 (Old NCERT) - Question 4

Planting trees on both the sides of roads and highways is called providing green muffler. It is to reduce :

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 4

Planting trees on both the side of roads and highways is called providing green muffler. It is done to reduce noise pollution to nearby residential areas.

Test: Environmental Issues - 2 (Old NCERT) - Question 5

Irreparable computers and other electronic goods are known as

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 5

Irreparable computers and other electronic goods are known as e-wastes or electronic wastes. E-wastes are buried in landfills or incinerated.

Test: Environmental Issues - 2 (Old NCERT) - Question 6

Various methods applied for removing particulate pollutants from air employs:

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 6

For removing particulate pollutants from air various methods are applied such as use of activated charcoal and calcium hydroxide that absorbs the particulate matters form polluted air.

Test: Environmental Issues - 2 (Old NCERT) - Question 7

Deoxygenation of water causes :
i. conversion of eutrophic water body back into oligotrophic.
ii. growth of anaerobic microbes producing secondary pollutants like H2S.

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 7

Deoxygenation of water bodies means reducing the oxygen from the water. Deoxygenation do not convert eutrophic water body back into oligotrophic. In such waters growth of anaerobic microbes producing secondary pollutants like H2S.so, the statement i is wrong and ii is correct.

Test: Environmental Issues - 2 (Old NCERT) - Question 8

Huge quantity of sewage is dumped in a river, the BOD will

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 8

Huge quantity of sewage is dumped in a river, the BOD will increase as sewage contain large amount of organic matter that support large number of aquatic microbes that consume oxygen present in water.

Test: Environmental Issues - 2 (Old NCERT) - Question 9

Acid rain is due to

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 9

Acid rain is due to air pollution. Burning of fossils fuels release sulphur dioxide and nitrogen oxides that combine with water to form sulphuric acid and nitric acid during rain.

Test: Environmental Issues - 2 (Old NCERT) - Question 10

Eutrophication of water body occurs due to addition of

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 10

Eutrophication of water body occurs due to addition of detergents, fertilizers and untreated sewage.

Test: Environmental Issues - 2 (Old NCERT) - Question 11

Terrestrial life would become impossible with

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 11

Terrestrial life would become impossible with change in atmosphere permitting all solar radiations to reach lithosphere. Solar radiations are essential for food preparation that supports the aquatic life.

Test: Environmental Issues - 2 (Old NCERT) - Question 12

Aerosols decrease primary productivity by

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 12

Aerosols decrease primary productivity by reducing rate of photosynthesis of autotrophic organisms, which are primary producer of ecosystem of any kind of habitat.

Test: Environmental Issues - 2 (Old NCERT) - Question 13

Highest DDT deposition shall occur in

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 13

Dichlorodiphenyltrichloroethane (DDT) is chemically an organochlorine that was used an insecticide. It is a stable compound that shows high solubility in the fatty tissues. When it is released in the water via the agricultural field surface run-off, it is ingested by the aquatic organisms like phytoplankton that are main producers in an aquatic food chain. From these, DDT continues rising up the food chain. Because successive consumers at the successive trophic level consume more food, it accumulates at the higher trophic level in greater amounts. This is called biomagnification. Sea/gulls and birds are the top consumers in an aquatic food chain, they will show the highest accumulation.

Hence, the correct answer is 'Sea Gull/Birds'.

Test: Environmental Issues - 2 (Old NCERT) - Question 14

Fertilizers added to fresh water will cause

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 14

Fertilizers added to fresh water increase the nutrients that cause growth of large number of microbes in water that leads to eutrophication.

Test: Environmental Issues - 2 (Old NCERT) - Question 15

Correct order of concentration of DDT in following organisms are
i. Small fish
ii. Large fish
iii. Phytoplankton
iv. Human beings

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 15

The concentration of DDT increase with increase in trophic levels. Phytoplankton being producer have minimum concentration of DDT. Human being consume large number of fish so, concentration will be maximum due to biomagnifications.

Test: Environmental Issues - 2 (Old NCERT) - Question 16

Assertion: Agricultural output increased several times after introduction of DDT.
Reason: DDT was the first insecticide used on a wide scale.

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 16

DDT or dichloro-diphenyl trichloroethane was the first important synthetic pesticide (organo chlorine) discovered in 1939 by a Swiss chemist Paul Muller. It was toxic to wide range of insect pests ("broad spectrum") yet appeared to have low toxicity to mammals. It was persistent and didn’t break down rapidly in the environment, so that it didn’t have to be reapplied often. DDT was so effective at killing pests and thus boosting crop yields and was so inexpensive to make that its use quickly spread over the globe. Farmers used more and more DDT throughout the 1950s and 1960s to get an increased yield of crop,

Test: Environmental Issues - 2 (Old NCERT) - Question 17

Bioremediation of Phenol, one of the most common environmental pollutants is reported to be assisted by :

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 17

Bioremediation is a waste management technique that involves the use of organisms to remove or neutralize pollutants. Bioremediation of phenol is carried out using earthworms and bacteria.

Test: Environmental Issues - 2 (Old NCERT) - Question 18

The metal which is inert and when swallowed remains non-toxic but becomes severely toxic when inhaled in volatile form:

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 18

Mercury is inert and when swallowed remain non-toxic but becomes severely toxic when inhaled in volatile form. It enters the respiratory system and riches to lungs to cause lung cancer.

Test: Environmental Issues - 2 (Old NCERT) - Question 19

The possible drawback of bioremediation method for oil spill containment is :

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 19

Bioremediation method is used to remove oil spill containments in water bodies. In this method large number of bacteria outcompete other organisms for oxygen creating a dead zone.

Test: Environmental Issues - 2 (Old NCERT) - Question 20

Which of the two countries are most affected by global warming?

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 20

Global warming due to green house effect melts the glaciers and ice caps that increase the water level of oceans. The countries like Maldives and Bangladesh are in danger of submersion due to increasing ocean water level.

Test: Environmental Issues - 2 (Old NCERT) - Question 21

Global warming will cause

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 21

Global warming is caused by green house effect in which temperature of inner atmosphere increases that result into melting of ice caps and glaciers. The melting results into rise in levels of oceans.

Test: Environmental Issues - 2 (Old NCERT) - Question 22

Ozone layer in upper atmosphere is being destroyed by

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 22

Ozone layer in upper atmosphere is being destroyed by chlorofluorocarbon. CFC’s breaks the molecular O3 into O2 and O. thus layer of ozone get thinner and not able to prevent UV radiations.

Test: Environmental Issues - 2 (Old NCERT) - Question 23

The two main reason for increase in CO2 gas is

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 23

The two main reasons for increase in CO2 gas are destruction of forest and excessive combustion of fossil fuels. Forests help in decreasing CO2 gas by photosynthesis process.

Test: Environmental Issues - 2 (Old NCERT) - Question 24

Concentration of green house is increasing due to
I. Deforestation
II. Increased use of refrigerators
III. Increased combustion of coal and petroleum
IV. Increasing human population

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 24

Concentration of green house is increasing due to deforestation, increased use of refrigerators and increased combustions of coal and petroleum. Deforestation causes increased level of CO2 gas, refrigerators releases CFC’s gas and burning of fossil fuels also increases carbon dioxide level in atmosphere.

Test: Environmental Issues - 2 (Old NCERT) - Question 25

Deforestation generally decreases

Detailed Solution for Test: Environmental Issues - 2 (Old NCERT) - Question 25

Deforestation generally decreases rainfall. Plants release water vapour in form of water vapour in the process of transpiration. The water vapour contribute in cloud formation to bring rains.

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