Photochemical smog pollution does not contain:

1. ozone

2. nitrogen dioxide

3. carbon dioxide

4. PAN (Peroxy Acyl Nitrate)

The limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal wastewater into natural surface water is:

1. < 3.0 ppm

2. < 10 ppm

3. < 100 ppm

4. < 30 ppm

Which of the following supports a dense population of plankton and littoral vegetation?

1. Oligotrophic

2. Eutrophic

3. Lithotrophic

4. Agroecotrophic

Maximum greenhouse gases are released by:

1. India

2. Britain

3. USA

4. France

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

1. $S{O}_2$

2. $N{O}_x$

3. SPM

4. CO

A lake with an inflow of domestic s wage rich in organic waste may result in:

1. Drying of the lake very soon due to algal bloom

2. Increased production of fish due to lot of nutrients

3. Death of fish due to lack of oxygen

4. Increased population of aquatic food web organisms

Minamata disease is caused due to the presence of …………. in water.

1. cadmium

2. lead

3. arsenic

4. mercury

Biological Oxygen Demand (BOD) is a measure of:
 

The Montreal Protocol refers to:

1. persistent organic pollutants

2. global warming and climate change

3. substances that deplete the ozone layer

4. biosafety of genetically modified organisms

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