Question # 1

In water the concentration of dissolved O₂should be

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1-3 ppm

2-4 ppm

4-8 ppm

8-12 ppm

Which one of the following is secondary pollutant of atmosphere.

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CO

NO2

SO2

H2SO4

The pH range of the acid rain is.

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7-6.5

6.5-6

6-6.5

Less than 5

Ecosystem is smaller unit of

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Lithosphere

Hydroshpere

Amosphere

Biosphere

A single chloride free radical can destroy how many ozone molecules

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100

100,000

100,00

unlimited

The temperature in the incineration of industrial and hazardous waste process has a range.

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900 to 1000 ^oC

250 to 500^oC

950 to 1300^oC

500 to 900^oC

Water is disinfected by a substance to avoid toxification

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KMnO₄

Alums

O₃

Cl₂

Ecosystem is a smaller unit of

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lithospher

hydroshper

atmosphere

biosphere

Ozone is mostly produced in

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Tropical region

North polar region

South polar region

Thermosphere zone of atmosphere

The main pollutant of leather tanneries in the waste water is due the salt of.

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Lead

Chromium (VI)

Copper

Chromium (III)

Acid rain fist of all was observed by

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Augus Smith

Robert Hook

Mosley

Watson

The pH range of the acid rain is

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7-6-5

6.6-6

6-5.6

less than 5

Fungicides are the pesticides which

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Control the growth of fungus

Kill insects

Kill plants

Kill herbs

Which one is primary pollutant.

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Peroxyacetyl nitrate

Sulphuric acid

Carbonic acid

Carbon monoxide

The region of earth capable of supposing life is called.

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Atmosphere

Bisphere

Dithosphere

Hydrosphere

Which field produces significant amount of methane in the atmosphere

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paddy field

Cotton field

Can sugar field

Wheat field

The minimum temperature of troposphere is.

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-2^oC

-56^oC

-100^oC

15^oC

The yellowish colour in photochemical smog is due to the presence of.

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NO

NO2

SO2

CO2

Peroxyacetylnitrate (PAN) is an irritant to human beings and it affects

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eyes

ears

stomach

nose

The smog which have high contents of SO2 in it, is called.

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Reducing smog

Oxidizing smog

Natural smog

Neutral smog

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