Environmental Issues · Biology · NEET

Nitrates and phosphates flowing from agricultural farms into water bodies are a significant cause of :

What will happen if fresh water lake gets contaminated by addition of polluted water with high BOD?

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Select the correct statements regarding dissolved Oxygen and Biochemical Oxygen Demand. (A) BOD is inversely related to dissolved oxygen. (B) Low...

The thickness of ozone in a column of air in the atmosphere is measured in terms of :

Which of the following statements is correct?

Given below are two statements: Statement I: Electrostatic precipitator is most widely used in thermal power plant. Statement II : Electrostatic preci...

Why CNG is considered better fuel than diesel? (a) It can not be adulterated. (b) It takes less time to fill the fuel tank (c) It burns more efficient...

The device which can remove particulate matter present in the exhaust from a thermal power plant is:

The entire fleet of buses in Delhi were converted to CNG from diesel. In reference to this, which one of the following statements is false?

Given below are two statements: Statement I : In a scrubber the exhaust from the thermal plant is passed through the electric wires to charge the dust...

Dobson units are used to measure thickness of :

Snow-blindness in Antarctic region is due to

Montreal protocol was signed in 1987 for control of

In water hyacinth and water lily, pollination takes place by :

Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder causing wheezing due to :

Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?

Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for :

Which of the following pairs of gases is mainly responsible for green house effect?

Which one of the following equipments is essentially required for growing microbes on a large scale, for industrial production of enzymes?

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

World Ozone Day is celebrated on

In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen?

Which of the following is a secondary pollutant?

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Which one of the following statements is not valid for aerosols ?

A lake which is rich in organic waste may result in

The highest DDT concentration in aquatic food chain shall occur in

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

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

A river with an inflow of domestic sewage rich in organic waste may result in -

Joint Forest Management Concept was introduced in India during :

Acid rain is caused by increase in the atmospheric concentration of -

Eutrophication of water bodies leading to killing of fishes is mainly due to nonavailability of -

The UN conference of Parties on climate change in the year 2012 was held at :

Increase in concentration of the toxicant at successive trophic levels is known as :

Which of the following are most suitable indicators of SO2 pollution in the environment?

The UN Conference of Parties on climate change in the year 2011 was held in :

High value of BOD (Biochemical Oxygen Demand) indicates that :

Which of the following is not one of the prime health risks associated with greater UV radiation through the atmosphere due to depletion of stratosphe...

Rachel Carson's famous book "Silent Spring" is related to:

A scrubber in the exhaust of a chemical industrial plant removes :

The zone of atmosphere in which the ozone layer is present is called :

A location with luxuriant growth of lichens on the trees indicates that the :

The second commitment period for Kyoto Protocol was decided at :

Climate of the world is threatened by :

Which one of the following is not correct as regards the harmful effects of particulate matter of the size 2.5 micro meters or less ?

Kyoto-Protocol was endorsed at :

Global warming can be controlled by :

The Air Prevention and control of pollution Act came into force in :

In an area where DDT had been used extensively, the population of birds declined significantly because :

Measuring biochemical oxygen demand (BOD) is a method used for

Which one of the following is a wrong statement?

''Good ozone'' is found in the :

Eutrophication is often seen in :

Which one of the following statements is wrong in case of Bhopal tragedy ?

Which one of the following pairs of gases are the major cause of "Green house effect"?

Which one of the following is correct expanded forms of the following acronyms ?

When domestic sewage mixes with river water -

A renewable exhaustible natural resource is –

dB is a standard abbreviation used of the quantitative expression of –

The two gases making highest relative contribution to the green house gases are –

Step taken by the Government of India to control air pollution include :

Global agreement in specific control strategies to reduce the release of ozone depleting substances, was adopted by :

Biochemical Oxygen Demand (BOD) in a river water :

Montreal protocol aims at :

Chipko movement was launched for the protection of -

DDT residues are rapidly passed through food chain causing biomagnification because DDT is :

A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this? (i) Lots of urea and phosphate f...

According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for grea...

Which one of the following is the correct percentage of the two (out of the total of 4) greenhouse gases that contribute to the total global warming ?...

In which one of the following the BOD (Biochemical Oxygen Demand) of sewage (S), distillery effluent (DE), paper mill effluent (PE) and sugar mill eff...

Which one of the following is not a bioindicator of water pollution ?

In a coal fired power plant electrostatic precipitators are installed to control emission of:-

Which one of the following statements is correct ?

Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters, is ...

Montreal Protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year-

Photochemical smog pollution does not contain-

Prolonged liberal irrigation of agricultural fields is likely to create the problem of -

Which of the following is not used for disinfection of drinking water ?

Identify the correctly matched pair -

Which one of the following pairs is mismatched ?

In 1984, the Bhopal gas tragedy took place because methyl isocyanate :-

Lead concentration in blood is considered alarming if it is -

Common indicator organism of water pollution is :-

Fluoride pollutions mainly affects : -

Escherichia coli is used as an indicator organism to determine pollution of water with ;-

Which of the following is absent in polluted water ?

Maximum green house gas released by which country :

What is B.O.D ?

What is the intensity of sound in normal conversation ?

Which is the cause of damage to relative biological effectiveness ?