Environmental Issues

 

Environmental Issues

1. DB is a standard abbreviation used for the quantitative expression of

a)The density of bacteria in a medium

b) A particular pollutant

c) The dominant bacillus in a culture

d) A certain pesticide

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

a)UNEP - United Nations Environmental Policy

b)EPA - Environmental Pollution Agency

c)IUCN - International Union for Conservation of Nature and Natural Resources

d)IPCC - International Penal for climate Change

 

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

a) Birds stopped laying eggs

b) Earthworms in the area got eradicated.

c) Cobras were feeding exclusively on birds.

d) Many of the birds eggs, laid, did not hatch.

 

4. Measuring Biochemical Oxygen Demand (BOD) is a method used for

a) Estimating the amount of organic matter in sewage water.

b) Working out the efficiency of oil driven automobile engines.

c) Measuring the activity of saccharomyces cerevisiae in producing curd on a commercial scales

d) Working out the efficiency of RBCs about their capacity to carry oxygen

 

5. A scrubber in the exhaust of a chemical industrial plant removes

a) Gases like sulphur dioxide.

b) Particulate matter of the size 5 micrometer or above.

c) Gases like ozone and methane

d) Particulate matter of the size 2.5 micrometer or less

 

6. Rachel Carson’s famous book ‘Silent Spring’ is related to

a) Pesticide pollution

b) Noise Pollution

c) Population explosion

d) Ecosystem management

 

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

a) Biodeterioration

b) Biotransformation

c) Biogeochemical cycling

d) Biomagnification

 

8. A river with an inflow of domestic sewage rich in organic waste may result in: a) Drying of the river very soon due to algal bloom

b) Increased population of aquatic food web organisms

c) An increased production of fish due to biodegradable nutrients

d) Death of fish due to lack of oxygen

 

9. A lake which is rich in organic waste may result in

a) Drying of the lake due to algal bloom

b) Increased population of fish due to lots of nutrients

c) Mortality of fish due to lack of oxygen

d) Increases population of aquatic organisms due to minerals

 

10. The highest DDT concentration in aquatic food chain shall occur in

a) Seagull

b) Crab

c) Cell

d) Phytoplankton