Question # 1

A high frequency sound has frequency

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100 Hz

200 HZ

300 Hz

500 Hz

Which of the following substance has been advocated as fuel of future.

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O2

N2

H2

H2O

Which of the following health effect is caused by lead.

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Cancer

Neurotoxin

Hypertension

Kidney damage

Which of the following is not a chemical pollutant.

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Solid waste

Noiso

Insecticides

Liquid waste

Which of the following process involves the use fo organic compound as an electron acceptor.

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Aerobic respiration

Anaerobic respiration

Fermentation

Glycolsis

Which of the following substance is colloidal in nature.

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Clay

Al2O3

Fe2O3

All above

When rain is accompanied by a thunderstorm, the collected rain water will have pH

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Slightly lower than that of rain water without thunderatorm

Slightly higher than that of rain water without thunderastorm

Uninfluenced by occurrence of thunderatorm

Which depends on amount of dust in air

A man has to think of alternate sources of energy due to

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Shortage of vehicles

Shortage of fossil fuels

Construction of house

Running of power plant

Which of the following statement represent disadvantages of sanitary landfill

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Public opposition

Uneconomical

Health hazard

All above

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

Which of the following pollutant is not primary pollutant.

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Ash

Smoke

SO3

SO2

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

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Uranium mining

Uranium processing

Reactor waste

All above

Which of the following statements is not related to the decomposition phenomenon occurring in nature.

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Decomposition is due to autotrophic organisms

Decomposition involves bacteria and fungi

During decomposition organisms carry out specific reactions

Many species of decomposer are present in the biosphere

The range of sound pressure for uncomfortable level is.

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80 - 90 dB

100 - 120 dB

130-140 dB

All above

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 is a mode of controlling pollution in big cities.

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Cleanliness and less use of insecticides

Proper disposal of organic wastes, sewage and industrial effluents

Broader roads and shifting of factories out of the residential areas

All of above

The most harmful components of incomplete combination are generally groped as particulate polyclic matter organic (PPOM) These materials are derivatives of .

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Benzene

Naphthalene

Benz a pyrene

None of the above

carbon monoxide is harmful to human beings as it.

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Is carcinogenic

Is antagonistic to CO2

Has higher affinity for haemoglobin as compared to oxygen

Is destructive to O3

The expected specific waste fo petroleum industry is.

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Asphalt and tars

Paper

Cloth

Fibre

Permanent hardness of water is due to.

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Sulphate of Ca

Chloride of Ca

Sulphate of Mg

All above

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