Environmental I...

Smog which doesn’t contain any secondary pollutants is:

Read the following statements:
i. carbondioxide is a qualitative pollutant.
ii. carbondioxide is already present in environment and is termed as pollutant when it’s concentration increases in the environment:

The dust collection efficiency of Electrostatic precipitator is affected by the particle size of the aerosol to be collected, so :

Planting trees on both the sides of roads and highways is called providing green muffler. It is to reduce :

Irreparable computers and other electronic goods are known as

Various methods applied for removing particulate pollutants from air employs:

Deoxygenation of water causes :
i. conversion of eutrophic water body back into oligotrophic.
ii. growth of anaerobic microbes producing secondary pollutants like H₂S.

Huge quantity of sewage is dumped in a river, the BOD will

Acid rain is due to

Eutrophication of water body occurs due to addition of

Terrestrial life would become impossible with

Aerosols decrease primary productivity by

Highest DDT deposition shall occur in

Fertilizers added to fresh water will cause

Correct order of concentration of DDT in following organisms are
i. Small fish
ii. Large fish
iii. Phytoplankton
iv. Human beings

Assertion: Agricultural output increased several times after introduction of DDT.
Reason: DDT was the first insecticide used on a wide scale.

Bioremediation of Phenol, one of the most common environmental pollutants is reported to be assisted by :

The metal which is inert and when swallowed remains non-toxic but becomes severely toxic when inhaled in volatile form:

The possible drawback of bioremediation method for oil spill containment is :

Which of the two countries are most affected by global warming?

Global warming will cause

Ozone layer in upper atmosphere is being destroyed by

The two main reason for increase in CO₂ gas is

Concentration of green house is increasing due to
I. Deforestation
II. Increased use of refrigerators
III. Increased combustion of coal and petroleum
IV. Increasing human population

Deforestation generally decreases