Question # 1

Smaller unit of biosphere is:

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specie

ecosystem

plankton

troposphere

The region of earth capable of supporting life is

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Hydrosphere

Lithosphere

Biosphere

Atmosphere

Cyclone collector is used to reduce

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Noise pollution

Air pollution

Water pollution

Radioactive pollution

Ozone is usually produced in the

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South polar region

North pole region

Tropical region

Thermosphere zone

Out of total amount of water available for human use is

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0.30%

0.2%

40%

50%

Which is unnecessary for purification of water for drinking purposes

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Coagulation

Aeration

Treatment with Iodine

Treatment with chlorine

The scope of environmental chemistry is to study:

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Source of chemicals

Transportation of chemicals

Transportation of toxic chemical

All of these

Which one of the following is used as coagulant for purification potable water

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Copper sulphate

Alum

Barium sulphate

Nickel sulphate

Which factor is helping to reduce the environmental pollution

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Urbanization

Industrialization

Increase of plantation

Rapid growth of population

One of the environmental problem is the formation of oil slicks when oil is spilled form tankers in sea water. Which treatment is suitable to remove oil slicks

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Blow air

Add Na₂CO₃

Use a specially made sorbent having fluorine trapped in it

Use a sorbent having Al₂O₃trapped in it

Chloroform is carcinogenic:

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Heart

Lungs

Liver

Kidney

The most important pesticides are:

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Herbicides

Insecticides

Fungicides

All

Ocean contains part earth's water:

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95%

96%

97%

98%

Contamination of water of tanning industries is due to:

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Cr(III)

Cr(VI)

Mn(III)

Mn(VII)

Transformation is a cyclic process in which used plactic is

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Remelted and styrene is added

Converted into low quality substance

Converted back into original components

None of these

Test of incomplete combustion of petrol in the presence of

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CO₂

SO₂

NO₂

Co

The main pollution of leather tanneries in the waste is due to the salt of

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Chromium

Copper

Chromium

Lead

The layer of gases around the earth are called?

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Atmosphere

Hydrosphere

Lithosphere

All of these

Ecology is a science of environment and deals specially with

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stratosphere

biosphere

lithosphere

hydrosphere

Surface and ground water sources are contaminated by various human activities which of the followings is not a human activity that causes contamination in fresh water

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live stock waste

oil leaks and spills

disposal of industrial effluents

rain

Air pollution causes

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Acid rain

O₃ depletion

Green House Effect

All

Photo chemical smog contains ______ as main reactants

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Nitrons oxide and unburnt hydrocarbons

Nilric oxide and unburnt hydrocarbons

No and burnt hydrocarbons

N₂O and burnt hydrocarbons

Soil remediation means

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to make it suitable for cultivation of crops

to make it acidic

to make it alkeline

to add manure into it

Coagulation in the purification of water is carried out by

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Alum

NiSO₄

BaSO₄

CuSO₄

In the atosphere, CO₂is about

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0.01%

0.03%

0.05%

0.09%

Water bodies are included in:

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Atmosphere

Hydrosphere

Lithosphere

All of these

alum or aluminium sulphate used as coagulant in alkaline medium change into precipitate of radicals of alumimium.

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sulphates

oxides

hydroxides

chlorides

Which step is unnecessary for purification of water for drinking purposes

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aeration

coagulation

treatment with chlorine

treatment with iodine

Acidification of soil can leach metal:

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Al

Hg

Pb

Ca

Leaching of nutrients is due to

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Drying of soil

Combustion of soil

Acidification of soil

Neutralization of soil

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

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900 - 1000°C

250 - 500°C

950 - 1300°C

500 - 900°C

Polar ice caps and glaciers consists total earth water:

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1%

2%

3%

4%

Ozone in stratosphere extends upto km:

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0-15 km

10-15 km

15-40 km

15-25 km

Rigid rocky crust earth upto a depth of 100 km is called:

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Atmosphere

Hydrosphere

Lithosphere

All of these

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