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

1. estimating the amount of organic matter in sewage water

2. working out the efficiency of oil driven automobile engines

3. measuring the activity of Saccharomyces cerevisae in producing curd on a commercial

scale

4. working out the efficiency of RBCs about their capacity to carry oxygen

 

Which one of the following pairs of gases are the major cause of Green house effect?

1. CO₂ and CO

2. CFCs and SO₂

3. CO₂ and N₂0

4. CO₂ and O₃

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

1. Thousands of human beings died

2. Radioactive fall out engulfed Bhopal

3. It took place in the night of December 2/3, 1984

4. Methyl isocynate gas leakage took place

Eutrophication is often seen in

1. fresh water lakes

2. ocean

3. mountains

4. deserts

A renewable exhaustible natural resource is 

1. coal

2. petroleum

3. minerals

4. forest

dB is a standard abbreviation used for the quantitative expression of

1. the density of bacteria in a medium

2. a particular pollutant

3. the dominant Bacillus in a culture

4. a certain pesticide

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

1. CO₂ and CH₄

2. CH₄ and NO₂

3. CFCs and N₂0

4. CO₂ and N₂0

Chipko movement was launched for the protection of

1. grasslands

2. forests

3. liverstock

4. wet lands

According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometres) of the air pollutants is responsible for greatest harm to human health?

1. 2.5 or less

2. 1.5 or less

3. 1.0 or less

4. 5.2 or 2.5

Which one of the following is being tried in India as a biofuel substitute for fossil fuels?

1. Jatropha

2. Azadirachta

3. Musa

4. Aegilops