Question # 1

Most hazardous metal pollutant of automobile exhaust is

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Mercury

Lead

Cadmium

Copper

In purification of potable water the coagulant used is

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Nickle sulpahte

Copper sulpahte

Barium sulpahte

Alum

Exposure to CO results in

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Headache

Fatigue

Unconsciousness

All of these

Mottling of teeth is due to presence of an element in drinking water

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Mercury

Fluorine

Boron

Chlorine

Pollution is

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Removal of top soill

Release of toxic/undesirable materials in enevironment

Conversation of energy

All the above

The pH range of the acid rain is

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8 - 7

7 - 6.5

6.5 - 6

Less than 5

NO and NO₂gases in atmosphere are represented by

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NO

NO₄

NO_x

N_xO_y

Polycyolic aromatic hydrocarbons are taught to be

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Disinfectant

Carcinogenic

Helpful

Reactive

Ozone depletion in stratosphere shall result in

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Forest fires

Increased incidence of skin cancer

Global warming

None of the above

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

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Live stock waste

Agricultural pesticides

Oil breaks and spills

All of the above

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

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It attaches to sulphur of the disulphide link

Hg is a heavy metal

Hg is liquid at room temperature

Hg is non reactive chemically

Acid rain is due to increase in atmospheric concentration of

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Ozone and dust

CO₂and CO

SO₃and CO

SO₂and NO₂

SO₂and NO₂produce pollution by increasing

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Alkalinity

Acidity

Neutrality

Buffer action

Which one is the major reason for pollution in high cities?

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Fossil fuel

Acid rain

Heat dispersion

None of the above

One of the environmental problem is the formation of oil slicks when oil is spilled from 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 flouring trapped in it

Use a sorbent having Al₂O₃trapped in it

Which gas is not a constituent of atmosphere

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Xe

O₃

H₂

F₂

Which of the following waste material is not recycled for use again

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Paper

Plastic

Hides of animals

Glass

Sulphur dioxide affects

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Cell wall

Plasmodesmata

All membrane systems

Nucleus

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

Baloons and turbo-prop aeroplanes

Which is not the condition for the formation of smog

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There must be sufficient NO gas

There must be sunlight to help photo chemical reaction to take place

Air must be blowing swiftly

There must be SO₂in the air

A single chlorine free radical can destroy how many ozone molecules

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100

100000

10000

10

Soil salinity can be measured by

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Calorimeter

Potometer

Porometer

Conducitvity meter

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

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SO₂

NO₂

CO

A and b only

The 95.5% mass of Lithosphone is made of 11 elements i.e. O₂, Si, Al, Fe, Ca, Na, K, Mg, Ti, H₂and P. which element is present in trace amount

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Iodine

Bromine

Lead

Carbon

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

Swage water is purified by

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Microorganisms

Light

Fishes

Aquatic plants

Burning of fossil fuels is the main source of pollution

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Nitrogen oxide

Nitric oxide

Nitrous oxide

Sulphur dioxide

The region of earth capable of supporting life is

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Hydrosphere

Lithosphere

Biosphere

Atmosphere

Minamata disease is due to pollution of

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Organic waste into drinking water

Oil spill in water

Industrial waste containing mercury into fishing water

Arsenic into the atmosphere

Which is not the affect of polluted air on environment

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Acid rain

Smog

Ozone

Global warming

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