Environmental Issues · Question 43

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

1. It can directly enter into our circulatory system
2. It can be inhaled into the lungs
3. It can cause respiratory problems
4. It can cause inflammation and damage to the lungs

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

1. Earthworms in the area got eradicated
2. Cobras were feeding exclusively on birds
3. Birds stopped laying eggs
4. Many of the birds' eggs laid did not hatch

Which one of the following is a wrong statement?

1. Most of the forests have been lost in tropical areas
2. Greenhouse effect is a natural phenomenon
3. Ozone in upper part of atmosphere is harmful to animals
4. Eutrophication is a natural phenomenon in freshwater bodies

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

1. Working out the efficiency of oil driven automobile engines
2. Estimating the amount of organic matter in sewage water
3. Measuring the activity of Saccharomyces cerevisiae in producing curd on a commercial scale
4. Working out the efficiency of R.B.Cs. about their capacity to carry oxygen

"Good ozone" is found in the

1. Troposphere
2. Ionosphere
3. Stratosphere
4. Mesosphere

Eutrophication is often seen in :

1. Ocean
2. Mountains
3. Deserts
4. Fresh water lakes

Which one of the following pairs of gases is the major cause of "greenhouse effect"?

1. CFCs and SO2
2. CO2 and CO
3. CO2 and N2O
4. CO2 and O3

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

1. Thousands of human beings died
2. It took place in the night of December 2/3, 1984
3. Radioactive fallout engulfed Bhopal
4. Methyl isocyanate gas leakage took place

Which one of the following is the correct expanded form of the given acronym?

1. IPCC = International Panel for Climate Change
2. EPA = Environmental Pollution Agency
3. UNEP = United Nations Environmental policy
4. IUCN = International Union for Conservation of Nature and Natural Resources

When domestic sewage mixes with river water

1. The river water is still suitable for drinking as impurities are only about 0.1%
2. Small animals like rats will die after drinking river water
3. The increased microbial activity releases micro-nutrients such as iron
4. The increased microbial activity uses up dissolved oxygen