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

Which one of the following is the correct percentage of the two (out of the total of 4) green-house gases that contribute to the total global warming?

1. CFCs 14%, CH₄ 20%

2. CO₂ 40%, CFCs 30%

3. N₂O 6%, CO₂ 86%

4. CH₄ 20%, N₂O 18%

Which one of the following is being utilized as a source of bio- diesel in the Indian

countryside?

1. Euphorbia

2. Beetroot

3. Sugarcane

4. Pongamia

In a coal fired power plant electrostatic precipitators are installed to control emission of:-

1. SO₂ 

2. NO_x

3. SPM

4. CO

Which one of the following is not a bioindicator of water pollution?

1. Sludge-worms

2. Blood-worms

3. Stone flies

4. Sewage fungus

The "blue baby' syndrome results from

1. excess of chloride

2. methaemoglobin

3. excess of dissolved oxygen

4. excess of TDS (Total Dissolved Solids)