Question # 1

Most Hazardous metal pollutant of automobile exhaust is.

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Tin

Mercury

Cadmium

Lead

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

Result of ozone hole is.

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Acid rain

Global warming

Increased amount of CO2

Greater exposure of earth to U.V. rays.

Which of the following is component of the ecosystem.

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Inorganic substances

ORGANIC Substances

Animal and plants only

All above

Environmental pollution effects.

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Biotic component

Plants only

Humans only

Both biotic and abiotic components of environment

Acid rain is caused due to increase in the concentration of _______ in the atmosphere

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Ozone and dust

CO2 and CO

SO3 and CO

SO2 and NO2

Fish die in water bodies polluted by sewage due to.

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Pathogens

Clogging of gills by silt

Reduction in dissolved oxygen

Foul smell

Which of the following pose threat to historical monument Taj.

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Floods in Yamuna river

Temperature mediated spoilage of marble

Air pollutants from Mathura refinery

Weathering of marble

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

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> 25 dB

< 25 dB

<20 dB

None of these

Ozone layer of stratosphere requires protection from indiscriminate use of.

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Fungicides, insecticides, bactericides and medicines

Aerosols and high flying jets

Atomic explosions and industrial wastes

Weather ballons

Which of the following substance is not present in acid rain.

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Sulphuric acid

Nitric acid

Acetic acid

Sulphurous acid

The range of sound pressure which is painful is as

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130-140 dB

100 - 120 dB

90 - 80 dB

All above

The presence of which of the following in drinking water is responsible for mottling of teach.

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Mercury

Iodine

Chlorine

Flourine

Which among the following is secondary pollutant.

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CO

CO2

PAN

Aerosol

Ozone is stratosphere is depleted by

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CF2Cl2

C7F16

C6H6Cl6

C6F6

Which of the following statement is no true with respect to nitrogen dioxide.

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It is produced by the oxidation of NO

Its small concentration has been detected to lower stratosphere

It is major pollutant

It does not absorb sunlight.

Which of the following metal acts as pollutant.

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Hg

Pb

Zn

Ni

All above

UV radiation from the sun causes a reaction in the atmosphere that leads to production

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Fluorides

Carbon monoxide

Sulphur dioxide

Ozone

Which of the following process is a source of nuclear pollution.

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Uranium mining

Uranium processing

Reactor waste

All above

SO2 is generated from which of the following industry.

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Drying and packing

Paper

Pulp

paper and pulp

The main active contaminants of uranium processing are.

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U - 235

U-238

Pu -234

All above

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