Environmental Issues

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

A renewable exhaustible natural resource is –

1. Forest
2. Minerals
3. Coal
4. Petroleum

dB is a standard abbreviation used for the quantitative expression of –

1. the dominant Bacillus in a culture
2. the density of bacteria in a medium
3. a certain pesticide
4. a particular pollutant

The two gases making highest relative contribution to the greenhouse gases are –

1. CFCs and N2O
2. CO2 and N2O
3. CO2 and CH4
4. CH4 and N2O

Global agreement in specific control strategies to reduce the release of ozone depleting substances, was adopted by :

1. The Montreal Protocol
2. The Kyoto Protocol
3. The Vienna Convention
4. Rio de Janeiro Conference

Biochemical Oxygen Demand (BOD) in a river water :

1. Gives a measure of Salmonella in the water
2. Has no relationship with concentration of oxygen in the water
3. Increases when sewage gets mixed with river water
4. Remains unchanged when algal bloom occurs