Question # 1

Which of the following level is an indicator of hearing loss.

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> 25 dB

< 25 dB

<20 dB

None of these

Maximum desirable concentration of fluorides according to international standard is.

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10-100 ppm

1 ppm

100-200 ppm

10-20 ppm

Which of the following pollutant result from combustion of fossil fuels.

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SO2

NOx

CO

All above

Which of the following gas protects us form harmful effect of uv radiation.

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SO2

NO2

CO

O3

Which of the following is domain of industrial ecology.

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The materials extractor

The materials processor

The consumer

All of above

Carbon dioxide content in atmosphere is

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0.0034%

0.034 %

0.34 %

3.4 %

The maximum noise level at which a man can work for 8 hours is.

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80 dB

70 dB

90 dB

60 dB

Commercial incinerators produce.

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Smoke

CO

NOx

All above

Which of the following process is not physical in nature.

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Mixing

Flocculation

Sedimentation

Activated sludge process

Drained sewage has B.O.D.

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More than that of water

Less than that of water

Equal to that of water

None of the above

Which of the following process is used for the removal of particulates.

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Wet removal by precipitation

Sedimentation

Diffusion and impaction

All above

Ozone layer of upper atmosphere is being destroyed by

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chlorofluorocarbons

SO2

Photochemical oxidants O2 and CO2

Smog

Which of the following reacts with hemoglobin of blood and produce toxic effect.

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Carbon dioxide

Carbon monoxide

Oxygen

Carbon suboxide

Burning of fossil fuels is the main sources of which of the following pollutant.

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Nitrogen oxide

Nitric oxide

Nitrous oxide

Sulphur dioxide

Which of the following health effect is caused by cadmium.

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Hypertension

Cardiovascular problem

Kidney damage

All above

Long diseases are about four times more in urban areas as compared to rural areas. This is due to the presence of which of the following. in atmosphere.

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CO2

NO2

O2

N2

Water pollution is due to

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Agricultural discharges

Swages and other wastes

Industrial effects

All the above

Which of the following statement is not related with environmental pollution.

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Direct or indirect change in any component of the biosphere

Undesirable change in the physical characteristics of the air

Undesirables change in the biological characteristics of the soil

not affecting adversely the industrial progress

Which of the following acids acts as acid waste from coal mines.

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HCl

HNO3

CH3COOH

H3PO4

Air pollution is not caused by

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Pollen grains

Hydroelectric power

Industries

automobiles

Solar energy mainly light originates from sun due to.

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Addition relations

Displacement reactions

Thermonuclear reactions

Substitution reactions

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