Question # 1

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

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SO2

NOx

CO

All above

The hardness of water i s due to the presence of dissolved soluble salts of.

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Calcium

Megnesium

Iron

All above

Chief source of water and soil pollution in

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Mining of ores

Thermal power plant

Agro industry

All the above

Which of the following gas does not exist free on earth.

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N2

H2

O2

CH4

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

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.

Human hearing is sensitive to frequency in the range of about

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10,000 - 20,000 Hz

10 - 10,000 Hz

16- 20,000 Hz

None of the above

Which of the following substance is generally not considered an air polutant.

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CO

CO2

SO2

NO2

Which of the following health effect is caused by mercury.

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Nerve damage

Brain damage

Kidney damage

All above

Which of the following statement is not related with the effect of thermal pollution.

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Decrease in BOD

Increase in BOD

Reduction in DO

Change in algal production

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

The alternate feasible fuel for existence of mankind to

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Uranium

Wood

Bontonite

Cloth residues

Which of the following to non -auditory effect of noise on human body.

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Changes in the Vascular tone

_{Increase in the blood pressure}

Wakening of the coloured vision

All above

Photochemical smog is caused primarily by

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CO

CO2

NO2

O3

The unit of sound pressure level is

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Pascal

Decibel

Newton

Ampere

Which of the following statement is not related with direct use of solar energy.

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It is used for space heating of buildings

It can be used to produce electrical power using photovoltaic cells

It can be used to produce hydrogen gas

It can be used start motor vehicle

The action of all the relations of all the organism to their environment is called

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Biology

Botany

Ecology

Archiology

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

Chlorofluorocarbon are widely used as coolants in.

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Air conditioners

Clearing solvents

Aerosol propellant's

All above

Environmental pollution effects.

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Biotic component

Plants only

Humans only

Both biotic and abiotic components of environment

Temporary hard water is softened on industrial scale by adding.

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Mg(OH)2

Ca(OH)2

KOH

NaOH

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