Environmental Issues

Select the correct statements regarding dissolved
Oxygen and Biochemical Oxygen Demand.
(A) BOD is inversely related to dissolved oxygen.
(B) Low dissolved oxygen and high BOD lead to
loss of aquatic life.
(C) High BOD leads to high...

Match List-I with List-II.

.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}...

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

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

Given below are two statements:
Statement I: Electrostatic precipitator is most widely used in thermal power plant.
Statement II : Electrostatic precipitator in thermal power plant removes ionising radiations.
In the light of the above stat...

Which of the following statements is correct?

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

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 efficiently.
(d) It is cheaper.
(e) It is less inflammable.
Choose the most appropriate answer from...

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 particles.
Statement II : Particulate matter (PM 2.5) cannot be removed by scrubber but c...

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?

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

Dobson units are used to measure thickness of :

Snow-blindness in Antarctic region is due to

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

Montreal protocol was signed in 1987 for
control of

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

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

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

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

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

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

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

World Ozone Day is celebrated on

Which of the following is a secondary pollutant?

Match the items given in column I with those in
column II and select the correct option given
below.

.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-style:solid;border-width:0px;font-family:Arial, sans-serif;font-size:14px;...

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

The highest DDT concentration in aquatic food chain shall occur in

A lake which is rich in organic waste may result in

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

Joint Forest Management Concept was introduced in India during :

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

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

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

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

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

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

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 -

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 2012 was held at :

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

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

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

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

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 ?

The second commitment period for Kyoto Protocol
was decided at :

Global warming can be controlled by :

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

Kyoto-Protocol was endorsed at :