Question # 1

Environmental pollution refers to.

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Peeling of top soil

Dissipation of energy

Release of toxic materials in environment

None of the above

Which of the following process is involved in getting back nitrogen into atomosphere.

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Nitrification

Denitricication

Ammonification

All above

Which of the following substance is a volatile metals.

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Lead

Zinc

Mercury

Sodium

Which of the following statement is not relevant with nitrous oxide.

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It is a colorless and odourless gas

It is non toxic gas

It is present in the atmosphere in higher concentration

It has high reactivity in the lower atmosphere

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

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Carbon dioxide

Carbon monoxide

Oxygen

Carbon suboxide

Which of the following compounds has fishing ordure

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ammonia

Organic sulphides

Amines

H2S

Acute toxicity is expressed by the term

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LD50

IC50

I 1/2

Mean life

The smog is essentially caused by the presence of.

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O3 and N2

O2 and N2

Oxides of sulphur and nitrogen

O2 and O3

Which of the following process is involved in nitrogen flotation

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Non symmetric fixation of nitrogen

Fixation by soil bacteria

Fixation by yeast

Fixation by blue green algae

All above

Which of the following is a source of energy but does not cause pollution.

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Gaslone

Nuclear power plant

Fossil fuels

Sun

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

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SO2

NOx

CO

All above

Which of the following trace elements may be present in the particulate materials.

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Cadmium

Nickel

Mercury

Lead

All of the above

Which of the following health effect is caused by lead.

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Cancer

Neurotoxin

Hypertension

Kidney damage

Which of the following metal acts as pollutant.

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Hg

Pb

Zn

Ni

All above

Photochemical among is generally formed

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In early hours of winters

Around mid day in summer months

When intensity of solar radiation sis very low

When concentration of particulate matter is very low.

The expected specific waste fo petroleum industry is.

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Asphalt and tars

Paper

Cloth

Fibre

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

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> 25 dB

< 25 dB

<20 dB

None of these

Which of the following techniques are used for minimizing water pollution.

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Stabilization of ecosystem

Recharge of the waste

Waste treatment

All above

Which of the following health effect is caused by cadmium.

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Hypertension

Cardiovascular problem

Kidney damage

All above

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

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Precipitation

Chemical reaction in the atmosphere

Absorption

All above

Most Hazardous metal pollutant of automobile exhaust is.

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Tin

Mercury

Cadmium

Lead

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