Which of the following is the use of lichens in case of pollution?

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Lichens are sensitive to sulphur dioxide pollution, hence they serve as bioindicators of pollution.

Agrochemicals include ____.

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Agrochemicals include fertilizers, pesticides, herbicides, fungicides, etc. Chemicals which are used in agriculture to improve and enhance the production of crops are called agrochemicals. Fertilizers like the NPK fertilizers enhance the production of crops, as they provide nutrients which may not have been obtained by the plants from the soil naturally. Pesticides, herbicides, fungicides, etc. prevent the crops from being destroyed by pests of all sorts, thus increasing production.

According to the Euro II norm, aromatic hydrocarbons are to be contained at 42% as ____.

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According to the Euro II norm, aromatic hydrocarbons are to be contained at 42% as it causes respiratory problems and cancers. High concentrations of hydrocarbons are known to irritate the mucous lining causing respiratory diseases and cancers. Once they enter the lungs they cause swellings in the lungs.

The stratosphere is known for the presence of ____.

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The stratosphere (which extends from 15 to 35 Km above the surface of the earth) is known for the presence of Ozone, which helps in shielding the living organisms against harmful radiations from the sun.

Among the given options, the one which is not an outcome of global warming is____.

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Among the given options, the one which is not an outcome of global warming is - an increase in electromagnetic radiations from the sun. An increase in electromagnetic radiations is a property of the sun, independent of the climate on the earth. Global warming is a phenomenon which will bring about drastic changes in the life of the living organisms.

Sewage water can be purified for recycling with the action of

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Because in the presence of oxygen micro-organisms (bacteria) oxidises the complex organic components to inorganic forms.

Most hazardous metal pollutant of automobile exhausts is

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Lead (Pb) is the most hazardous metal pollutant of automobile exhaust.

Atmosphere of big/metropolitan cities is polluted most by

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Automobile exhaust is the main cause of air pollution in metro cities.

When a city throws sewage into a river, the sewage from ____ will most easily spread diseases like typhoid, cholera, etc.

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When a city throws sewage into a river,the sewage from hospitals will most easily spread diseases like typhoid, cholera, etc. Sewage from hospitals are dangerous if let out untreated, as it contains remnants of tissue, blood diseased parts together with used bandages and waste from the operating rooms which are a haven for germs to thrive. Hence they contaminate the water body into which they flow. If water is obtained from the same source for drinking purposes, then there is a big chance of people contracting these diseases.

Naresh cried, covered his ears and said that he felt dizzy, when a cracker burst loudly near him, at a Diwali party. The reason for such a reaction could be that ____.

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Naresh cried, covered his ears and said that he felt dizzy, when a cracker burst loudly near him,at a deepavali party. The reason for such a reaction could be that he could have damaged his ears. When a sudden impact of loud noise, above the bearable limit, occurs very near the ear, it causes instant damage to the ears and results in pain, accompanied at times with nausea, vomiting and dizziness. Other symptoms like high BP, palpitation and sleeplessness have also been reported.

CPCB is an abbreviation for ____.

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CPCB is an abbreviation for Central Pollution Control Board. CPCB was constituted in 1974, under the Water (prevention and control of pollution)Act, 1974. Further, it was entrusted with the power and functioning under Air (prevention and control of pollution) Act, 1981. It promote cleanliness of streams and wells in different areas of the States by prevention, control and abatement of water pollution, and to improve the quality of air and to prevent, control or abate air pollution in the country.

Integrated Waste Water Management utilizes a mix of ____ and ____ processes.

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Integrated Waste Water Management utilizes a mix of artificial and natural processes. Integrated Waste Water Management is a technique which is unique, as it does not entirely depend on chemical treatments or man-made processes, but also incorporates the natural processes in treating waste water and making it safe to be let out into water bodies, without affecting the aquatic biotic community.

The most widely used method of removing of particulate matter of up to 99% from polluted air is by ____.

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The most widely used method of removing particulate matter up to 99% from polluted air is by electrostatic precipitator. Particulate matter in the air has to be removed before letting into the atmosphere. Various methods like filter chambers, water sprayers have not proved helpful in removing particulate matter. Electrostatic precipitators have been found to be the most successful as it removes 99% of the impurities from the polluted air.

Chipko movement in 1974 was spearheaded by ____.

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Sunderlal Bahuguna, the famous environmentalist, motivated the village folk of Garhwal Himalaya to hold on to the tree trunks when the contractors and the forest mafia were planning to cut down the trees. The contractors had to abandon their plans. This movement was called the 'chipko' movement.

Antarctica has been in the news as ____.

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It has been observed that Antarctica has a hole in the ozone layer above it which is a cause for worry as it may lead to melting of the ice and cause major damage to the environment It has been observed that major ozone damage, in this region, occurs during winters.

The acronym FOAM stands for_____________.

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The acronym FOAM stands for Friends Of Arcata Marshland. FOAM was formed in 1987, after the city of Arcata, in northern California, on a $100,000 grant from Ford Foundation's 'Innovations in Governance' programme.

Amrita Devi Bishnoi was famous for ____.

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Amrita Devi Bishnoi of Rajasthan was famous for her love for nature, so much so that she displayed extraordinary courage and dedication by giving up her life for protecting the trees around her.

The Haryana Kisan Welfare Club spreads information about ____ .

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The Haryana Kisan Welfare Club spreads the information about the benefits of the practice of integrated farming. The Haryana Kisan Welfare Club, which has the membership of more than 5000 farmers, has been promoting integrated organic farming, as it is a cyclic in nature, zero waste procedure, where the waste products of one process are cycled as nutrients of other processes.

Major aerosol pollutant in jet plane emission is

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Fluorides of carbon is the major pollutant from jet plane emission.

Delhi's motorists have all been advised to use CNG, which is ____ , to reduce pollution.

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Delhi's motorists have all been advised to use CNG, which is Compressed Natural Gas, to reduce pollution. Compressed Natural Gas is considered a better fuel as it contributes less towards environmental pollution. Delhi recorded a high amongst most cities in air pollution, hence this step was necessary to curb pollution.

A major component of gobar gas is

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Methane forms a major part of gobar-gas. Ammonia is toxic. Ethane and butane are not major components of gobar gas.

The people of Arcata made use of 60 hectares of ____ for waste water management.

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The people of Arcata made use of 60 hectares of marsh land for waste water management. After treatment of waste water artificially, the water according to the integrated system was further treated by natural agents. This was done by letting the treated water into areas of marshland to enable the natural agents to act on the pollutants.

Endosulfan', the banned chemical is a ____.

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Endosulfan, the banned chemical, is a pesticide. Endosulfan, an organochlorine, is used as an insecticide. It is very toxic and is a threat to human health. In Kerala, the chemical was used in cashew plantations and the local people suffered from severe forms of deformities. A global ban on this chemical was officially passed at the Stockholm convention on 28th April 2011.

Water pollution can be stopped best by

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Water pollution can be stopped best by treating effluents to remove injurious chemicals.

Human excreta can be recycled into ____.

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Human excreta can be recycled into a natural fertilizer for plants. Human excreta, if left to undergo microbial action, will be converted into manure within six months. This fact has been considered in the ecological sanitation schemes where eco toilets allow such microbial conditions, thus helping people who live in drought prone areas overcome the problem of waste disposal .

e- waste refers to____.

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e- waste refers to electronic waste. e- waste refers to parts of electronic goods like computer parts discs etc, which forms a major part of solid waste in cities and towns. These parts are non-biodegradable, and even if they are compacted in landfills, there is fear of seepage of chemicals into underground water sources.

The idea of burying the nuclear wastes in shielded containers, 500 m below the earth's surface has not been welcomed by the people as ____.

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The idea of burying the nuclear wastes in shielded containers, 500 m below the earth's surface, has not been welcomed by the people as the wastes can find way into the groundwater sources. Burying the nuclear wastes was considered the best way of getting rid of nuclear wastes, as there were less chances of animal life and plant life being affected, but studies have shown that the wastes can find their way into groundwater sources, thus contaminating them. The radiations from food or the environment has drastic side affects on mankind, and may cause deformities and cancers.

The best way of dealing with solid waste by municipalities of large cities is by _____.

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The best way of dealing with solid waste by municipalities of large cities is by sanitary landfills. Large cities have an enormous amount of solid waste. Metropolitan cities produce thousands of tonnes of solid waste every day. Hence,the easiest and the best way so far, is the use of sanitary landfills, which involves dumping waste in depressions over huge areas and putting the solid waste in layers, after compaction and layering with soil, allowing microbial action to take place in the layers below. This method also prevents rats and other pests from flourishing as it is covered by soil. It also does not allow the waste to flyaround and spread dirt in the surroundings.

What does ozone do to keep away UV radiations from reaching us?

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Ozone is formed when oxygen molecules absorb the short wavelengths of the UV rays in the stratosphere and gets converted into ozone. The longer wavelengths of UV rays are absorbed by the ozone molecule to dissociate back to oxygen. Therefore very few harmful radiations reach the earth's surface.

In the environment, ozone is known for its

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In the environmental, ozone is known for its both harmful and useful effects.

Class 12th Biology - 16 Environmental Issues MCQs
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Class 12th Biology - 16 Environmental Issues MCQs